Ford 289 rocker arm adjustment bdisanto Discussion starter. 8/351W) - 1973 Ford 302 valve adjustment - Hello, I have a 1973 Ford 302 in a boat that I have just rebuilt. Any suggestions Big Block V8 - 385 Series (6. Performance & General Engine Building - 289 rocker arms - What holds the rocker arms center on a 67 289. Get a feel for when the rockers are at their rest position. I can not find any information on how to adjust the rocker arms. 4K views 5 replies 3 participants last post by 63SPRINT Mar 24, 2003. This is a 289 with adjustable rockers. None-the-less, after buttoning her back up I still had the noise. These engines use hardened pushrods. Log In; Register; Forums. If, however, what you have actually is a lifter that's sticking, adjusting the valves won't help that. Wait a minute or two for that 260, 289, and 1968-69 302 V8 Engines. because they are unadjustable I didn't think this would be a problem. Stop the starter when they are both at rest. 1227 posts · Joined 2013 Add to quote; Only show this user #1 · Sep Roller Rocker Arm Adjustment (stud mount). 8/351W) - How to adjust valves on 289 - Can anyone tell to where I can get a book or an article on how to adjust my valves on a 289. 082-. 0/429, 7. The heads are the performer heads with ford racing roller rockers, edelbrock hydrollic cam and lifters. 122 posts · Joined 2008 Add to quote; Only show this user #1 · Nov 1, 2008. i hope my cam is not flat now but i don't think it is since it runs good and there is no metal I helped my dad adjust the valves in his '65 Ford Custom 289/3spd several times after engine rebuilds. Here is an article for you: Ford Then, give the rocker arm nut a 1/2 a turn by lining up the ratchet with the cylinder head, so the pre-load is set on the valves. Usually a 5/8" hex nut. 6:1 Any thing to look for using 1. The only manual I have is based on a total rebuild with collapsed lifters, therefore the gap they give is huge. Jump to Latest 23K views 12 replies 9 participants last post by DanH Dec 7, 2010. Is that too much or is When it is almost closed, stop and adjust the exhaust rocker arm on that particular cylinder. 8/351W) - how do I adjust roller rockers? - I have a 351w that has roller rockes and adjustable stud installed. 8/351W) - Rocker assembly adjustment 302 - Just installed stock cam and lifters in my 68 289/302 but not clear how to adjust rocker assembly on 68 289/302 with non-adjustable hydraulic rocker arms. Remove ALL upward and downward play in the pushrod, that is ZERO LASH, {lash being an air gap between the rocker arm and the valve stem while the pushrod is resting If you 'tighten the rocker arms until the tapping goes away' and you have a solid lifter 289, you will quickly bend pushrods/valves (or worse), and then have the oportunity to Do a search for valve adjustment. With the rocker arm loose, tighten the adjuster on the rocker stud while feeling clearance with the rocker arm and there’s no tension on the pushrod. A dial indicator with a Ford Inline Six, 200, 250, 4. I have never had to deal with these kind before and need some help on the correct Ford Inline Six, 200, 250, 4. Jump to Latest 8K views 5 replies 3 participants last post by dakine858 Nov 4, 2008. does anyone know what to do? 1966 289 Rocker arm ratio. When the exhaust valve just starts In think you are missing the fact that when you install NEW (non-stock) rocker arms you need to do TWO adjustments: 1. While it is possible to tap the stock stud points and install screw-in studs without removing the heads, it is not T-shirt & merch: https://www. Sort by Oldest first Oldest first Newest first Most reactions. Is there a special tool to hold the rocker and lifter in the collapsed position while The Ford 289 V8 engine was equipped with a total of 16 valves. When it is almost closed, stop and adjust the exhaust rocker arm on that particular cylinder. I have looked through a chiltons manual which told me next to nothing and my haynes manual is for 73-79 trucks so I do not know if would be correct for the specific year. I have an old shop The idea is to put the lifters onto the cam's base circle, or when the valve is closed, to make the adjustment. 9L / 300 - 86 300 rocker arm adjustment? - on my 86 bronco i am putting a different head back on, well the original head was off a 86 4. Passenger Car: 1962/63 406, 1963/64 427 have them. Rotate the crankshaft until the #1 piston is at TDC (top If they are pedastel mount, given the pushrod is the correct length bring the cylinder to top dead center and tighten to 18 to 25 ft-lb. 3L IDI & 6. (Image/Jim Smart) Beginning May 8, 1966 Ford went to rail-style rocker arms, which have guide rails cast into the valve end of the While not common, it's possible to have a rocker arm tip worn enough adjusting with a feeler gauge won't cause the tapping to cease. From what I have read, the proper way to adjust rockers is to tighten just until the pushrod takes a Then I turn the main adjusting hex nut back out the 1/2 a turn I just turned it (back to just resistance on the pushrod). Also, some rockers are taller dimensionally than the stock rockers leaving less threads at the top of the stud. T. 7 etc. Mike Larsen Discussion starter. 6 Rocker Ratio with 7/16" Stud (Set of 16) Learn More Big Block V8 - 385 Series (6. 5/460) - 429 Rocker arm adjustment - Ok, how do I adjust the rockers on my 69 DOVE-A heads. Rocker arms Even with the barrel shaped 5. Joined: Jan 20, 2013 Posts: 4,412. Fortunately, the process to adjust the 289's valves is fairly Ford adjustable rocker arm installation and adjustment! Always start with number 1 TDC compression stroke! Ford adjustable rocker arm installation and adjustment! Y-Block V8 (239, 272, 292, 312, 317, 341, 368) - Rocker arm adjusting stud question - What is the diameter of the ball part of the stud? (I'm hoping they are Ø3/8 ) Thanks! Rocker Arms Ford 289-302-351W V8 1. You need to look at the adjustable rockers on the earlier 302's that had adjustable rockers just like Chevrolet. At that point you give the rocker arm 1/2 to 3/4 more of a turn. This scheme is fully adjustable and may be used successfully with mechanical cams. Ford 260, 289 and 302 Valve Adjusting Order Need to adjust your valves on a Ford Small Block? This is the chart that will help you do it. This is for engines with the older firing order. Before following this procedure, verify that the rocker arm mounting studs do not incorporate a positive stop When the exhaust valve just begins to open on the number 1 cylinder, adjust the number 1 intake valve. ) . teepublic. 584 posts · Joined 2001 Add to quote; Only show this user #1 · Aug 23, 2009. This gap is usually measured with feeler gauges and is adjusted by threaded nut. Adjusting the valves actually adjusts the distance between the pushrod and the valve's rocker arm. I 300-6 Rocker arm adjustment I am doing a little bit of engine work to the 300-6 in my girlfreinds 82 bronco and was looking for a little advice on how the rocker arms are supposed to be adjusted. Everything adjusted OK. Glossary: Adjuster Nut: The tall nut that threads onto the rocker arm stud and sets the lifter pre-load. Jump to Latest 12K views 12 replies 5 participants last post by Mike Larsen May 2, 2012. 0 fulcrum it would seem that the rocker arm could still walk around as on the 289 with the half a ball style fulcrum, Maybe they just spread the load out better and stay aligned better. Tighten the adjusting nut until the slack is taken out of the rocker arm and pushrod. The book I recommend you buy for your build. I installed a power package from edelbrock on my 289 small block. Do this by loosening the rocker adjustment nut until you can move the pushrod up and down. went throuigh and thought I adjusted them acording to a motor manual ROCKER ARM ADJUSTMENT? Jump to Latest 3. Bout the time think I figured it out I read, or given advice contrary to my way To convert late 289/302 heads for use with mechanical tappets, all valves must be replaced with early (1963-66) type valves. Member. Did not have torque wrench when tightening rocker arms. Shop now! All 289 engines built after 1966 1/2 (except 289/271HP), and all 302 and 351 engines use "rail" rocker arms. I put a new cam in my 429 and at first thought I had adjustable rockers, but after reading on the internet tonight, think they are non-adjustable. The weiend and Chilton's instructions both recommends to torque to 18-25 lbs/ft at bottom of cam lobe. 22GT. 10 posts · Joined 2004 Add to quote; Only show this user #1 · Feb 25, 2005. Loosen the exhaust rocker arm and follow the same procedure described before in steps 3 and 4 to adjust this rocker arm. I have a 302 engine with 289 heads on it from a 66 mustang. If you car has a later model cam shaft you should use the 302 HO / 351W order which is different. Continue on through the firing order of the motor, which Need help with proper rocker arm nut size. Ther are plenty of videos on youtube to show you how to set the later style Check out Alf's Mustang Parts on Amazon www. I’m using the following procedure: Starting with #1 cylinder and going through the firing order. These engines were originally The rocker arm is held in alignment with the valve stem by a close tolerance pushrod slot machined into the cylinder head. Then while moving the pushrod, slowly tighten the adjustment nut until you feel no movement of the pushrod between the lifter and the rocker arm Upgrade your Ford 289 engine with precision-engineered rocker arms from Scorpion Racing Products. 73)). malstrom Discussion starter. The rail rockers are designed to "allign" the rocker and pushrod assembly with the valve. I prefer to torque Engine Swaps - 351w rocker arm question - Ok, this may sound kinda dumb, but what is rocker arm ratio? I mean I want to purchase some roller rocker arms for my 74 351w, but there are soo many types to choose from and there are ratios like 1. The new rockers I Big Block V8 - 385 Series (6. i have read that it is not possible to use a feeler gauge to set them. You anyone know the proper way to set the valve adjustment on a 66 289 with the rail type rocker arms. Started this motor up and had a bunch of clattering. The lifters are hydraulic, the push rods are oversized, the heads are Edelbrock, and it has Ford SVO roller rocker arms. Profile Page. Early 289 engines and 289/271HP use conventional rocker arms. southcross2631. Thanks for any information! Save Share Reply Quote Like. firing order good. could tightening them to tight cause. You can also twirl Small Block V8 (221, 260, 289, 5. Only tighten to the point where you The difference is the heads, I replaced them with gt40 heads. these adjust like almost all rocker arms do. I pulled off, pulled the valve cover, and sure enough one of the nuts had backed off Verifying rocker adjustment to end a debate. I hadn't gotten 1 mile down the road when I could hear one of the rocker arms must have come loose. Turn the engine over by hand until an exhaust valve is starting to open. 9L IDI, what is the proper procedure to torque the rocker arm assemblies? The manual I have says to turn the engine over by hand until the timing mark is at the 11 o'clock position as viewed from the front and then My rocker arm studs don't have a shoulder so instructions are to fully compress the lifter and set clearance around 0. Then with an allen wrench and my wrench on the adjusting nut I turn both their 1/2 turn at the same time bottoming out the allen screw just before the 1/2 turn is completed by the adjusting nut, better locking the adjusting those are the same ones on my 302. B. Rotate the engine in its normal direction of rotation (clockwise) and watch the exhaust valve on that particular cylinder. 77 posts · Joined 2007 Add to quote; Only show this user #1 · May 1, 2012. 9l, but anyways do i have to do a certain adjustment to the rockers or do i just torque them down to specs? OK, so I did the rocker arm adjustment, which was ridiculously easy! The right side need a lot of adjustment, the left side was much better. The CASO method is just to tighten it down until the tapping stops. 8/351W) - Valve Adjustment, 302 - When I finally figure out the piston issue from my last post, I am going to need to put this engine back together. These rocker arms were designed to work with short valve stems, which are nearly flush with the spring retainer. 1 piston on TDC at the end of the compression stroke, adjust the intake and exhaust valve clearance for No. Save Share Reply Quote Like. more. I want to get this thing set right. What are you going to do about rocker arms and the rocker arm valve adjustment locks? Let’s assume we’re setting the preload for the first time. Today I took the car out for a drive to test things out. 1/370, 7. One guy says to adjust on the tighter side, one guy says to go on the looser side. I'm confident the valve adjustment procedure and pre-load and zero lash have been done correctly (performed more than once so you tend to get good at In this video, we explain how to properly install and adjust roller rockers. 6. Be prepared to check pushrod length using an adjustable pushrod once you get the heads installed. The rocker arms seemed to be alright but being a novice at setting the valve train, I thought I may have tightened down the adjustment too much. The original heads had different type rockers than the GT40's The GT40's have GT40 heads rockers 1978-1996 255 302 351W FORD LINCOLN MERCURY ROCKER ARM | eBay The original rockers were: FORD MUSTANG BOSS 302 --OEM ROCKER ARM---LOT OF 8===-D8AZ-6564-B- | eBay Small Block V8 (221, 260, 289, 5. 3. 6 7/16 SKU: 73612-16 Stainless Steel Rocker Arms Ford 289-302-351W V8 1. I have ordered a book, but I doubt it will be here in time. Y. 6 or 1. This is why we prefer the hexshoulder, screw-in rocker-arm studs like we find with the 289 High All 302 engines had no adjustment you torque the rocker arm nuts OLDSMAN, Oct 29, 2019. anyone know the proper way to set the valve adjustment on a 66 289 with the rail type rocker arms. 7 ratio, not that it particularly matters for adjustment purposes. Conventional rockers have no These engines were originally equipped with this kind of stud. Your stock push rods should be okay for this. 5:1 or 1. the engine is out of the car and if it is possible i would like to Small Block V8 (221, 260, 289, 5. get the intake valve to tdc then take out all the tension. This can be done at a number of positions, but just make sure that Using an adjustable length checking pushrod you set the height of the rocker arm on the mounting stud so that the pattern the roller tip makes on the valve stem is centered and I can recall the process after all these years: while running the fully warmed engine with thermostat open and coolant flowing (very important due to oil viscosity effect on the It will go to full open and then begin to close. Notice how on each cylinder the intake rocker will move, then a pause then the exhaust rocker will move. Let's see what works. You have a C-code, so you should have the hydrualic lifters on your 289. The final pushrod length is 2. Jump to Latest 8K views 2 replies 2 participants last post by tphan Aug 23, 2009. Then, rotate the crankshaft 120*, where the rotor should be pointing at the #5 spark plug wire tower. 8/351W) - adjusting the rocker arms - hi i need to know how to adjust the rocker arms. The later heads in this link shows when they went to non adjustable rockers. (Again, when we see the intake almost closed, we are sure that exhaust lifter is on the base circle of the lobe. If they are adjustable or stud mount The 'valve lash' (rocker arm adjustment) has to be quite precise on these cars. pulled the valve covers and some of the rocker arms are not centered with the valve stems. If you have hydraulic lifters, you can set the valves with the engine running by backing the nut off until the rocker starts to clatter and then Today at Alf's Mustang Garage we continue with our 289 engine rebuild series with installing rocker arms and adjusting the valves. 1 cylinder. In that case, best science is to remove both rocker assemblies, have the shafts rodded out and the rockers reground. 39754 posts · Joined 2009 Add to quote; Only Big Block V8 - 385 Series (6. It has cast rockers and has what The other day I adjusted my valves to try and take out a small miss at idle. However, due to production differences, it is possible some 289 or early 302 engines may be encountered that are equipped with positive stop rocker arm mounting studs. 0/302, 5. You should be able to turn the pushrod with your fingers after you tighten the I need help on the adjustment proceedure for the rocker arms, mine are the adjustable type with hydraulic lifters. Loosen that intake rocker arm nut until you can move the pushrod up and down a little. Ford Truck Enthusiasts Here is the order to adjust your valves on a Ford 260, 289 and 302. Normal valve I am I need of original style rocker arms fo a 1966 Mustang 289 with 2 barrel Carb. ] So I need to find out which ones to get thanks Chris . OK so in a prevoius postI asked about rail, non-rail rockers for rebuilt 65-66 289 heads, and how to re-install as my son took With No. Lightly turn the pushrod with your fingers as you tighten the adjusting nut, and Small Block V8 (221, 260, 289, 5. Both valves on this cylinder are now adjusted, and Although 289 blocks can be drilled and tapped to 1/2", the mod is not always a sure thing. Are they 1. Tighten it's paired intake valve to zero lash and add a half a turn. valve adjustment rail rockers 289. Loosen the rocker arm stud nut until there is end clearance in the pushrod, then tighten the nut to just remove all the pushrod to rocker arm clearance. Quick GT Discussion starter. Starting at the position described above, adust the intake and exhaust for #1 cyl. Note that the rockers are also the same width, so again, no interchange problems. As an Amazon Associate I earn from qualifying purchases Valve lash by definition is the gap between the rocker arm and the tip of the valve stem. To adjust, back off the intake rocker arm adjusting nut and remove any tension from the push rod. 100" at the valve stem. Q. The #4 cylinder has a tick to it and when I adjust Small Block V8 (221, 260, 289, 5. Welcome. Summit carries numerous lengths of hardened pushrods in their TFS stuff. 8/351W) - 302 Valve lash adjustment? - I recently acquired a well abused 1965 F100 originally a 223 now has a 302 with rattling rocker arms how do I fix this. I didnt build the motor a shop did but i did just replaced a couple pistons and rings and I'm trying to adjust the roller rockers now that it's back together. 9936 posts · Joined 2001 Add to quote; Only show this user #2 · Feb 9, 2021. 5/460) - adjusting pedestal mount rocker arms - I have a 460 with D3 heads and pedestal mount roller rockers. Oldsman. Could anyone go over the process of assembling and adjusting the The manner in which you tighten the rocker arm nuts depends on which style studs are in your heads. 1977 351w rocker arm adjustment this engine should have hydralic lifters that take up the gap. 5. To do this, they have "lips" or edges that extend over the valve stem. Pre-Power Stroke Diesel (7. from Athens, Tennesse. 8/351W) - Rocker-arm Adjustment - I had to change the heads in my 85 F-150 with a 351W and the replacement heads (D80E) are a set of the older ones with the studs that the rocker arms attach to. com/user/nelson-performanceNelson Performance TV brings to you a video on installing and adjusting the Rocker Arms, in How to adjust the valves on a Ford 302 in under 8 minutes without running the engine For a 289, 1-5-4-2-6-3-7-8. 9l and the head i am putting on is off a 82 4. I have adjusted the rockers and everything sounds fine except for one cylinder. Unleash the power and performance you crave. i have an aftermarket cam and i did not adjust the rockers right. 6- except Cleveland conversions and the Boss 302. I've never seen the scale, nor have I had any tested to see what the actual hardness is. com/shops/mustangalfThings I used in this video. 9L / 300 - rocker arms to tight? - I just rebuilt my 87 4. While spinning FE: 1965/76 F100/350's didn't come with adjustable rocker arms. i have read that it is not possible to use FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428) - rocker arm adjustment - how do i adjust the rocker arms they are the adjustable type on a 390 How do I adjust valves on 289 rocker? Jump to Latest 8. Excuse me there Mr. If one is loose enough to make that much noise, then some of the others could be in process of turning loose. they came in either 1. These are '66 289 rocker arm stud choices, continued. Started putting my 302 back together, I had bought reconditioned heads, as per the casting number they were out of 69 truck. Some 1958/64 Passenger Cars (332/352/390) came with them, some did not. I am working on my 63 falcon with a 260 v-8 i need to adjust the rockers. I have two questions: 1. See Figure 2. Do the same adjustments to the #5 cylinder's rocker arms. i. 81 posts · Joined 2002 Add to quote; Only show this user #1 · Mar 24, 2003. This modification is often done to improve performance and increase torque in small-block Ford engines. yellowtonka2 Discussion starter. Fig. When the intake valve is almost closed,tighten the exhaust valve to zero lash plus a half a turn. Tighten the rockers on this cylinder only. i just tightened the bolts. same ones that come on 93 cobra engines. 9L) - Proper way to torque rocker arm assemblies? - On the 6. SHARE POST #2. 12 posts · Joined 2001 Add to quote; Only show this user #1 · Aug 21, 2002. 9L engine and now it runs very rough. I loosened one rocker arm while the car was running and it seemed that I had the rocker at one full turn after loosing that tapping noise. Some you tighten down until the nut is tight up against a shoulder on the stud and others you tighten by eliminating push rod play and then tightening the nut another 1/4 to 1/2 turn. I have a Hanes manual for 1973-1979 fords but cannot find any method for tightening the rocker arms. Can someone tell me what a good gap measure would be on Small Block V8 (221, 260, 289, 5. Both valves on this cylinder are now adjusted, and you can move on to your next 1965 Heads and rocker arms are adjustable read this: Ford Small Block Cylinder Heads, Valves and Valvetrain I have the 1965 Hi-Po heads C5OE-A's on my 302 which are adjustable as shown in this link. 63SPRINT Discussion starter. The adjuster nut is locked in position with a set screw When the exhaust valve just begins to open on the first cylinder in the firing order, adjust the intake valve by loosening the adjusting nut slightly while spinning the pushrod until you feel lash in the rocker arm. I am running with kieth black domed pistons. This procedure for the 289 and early 302 V8 engines is designed for engines in which the rocker arm mounting studs do not incorporate a positive stop shoulder on the mounting stud. I belive you just torque down the nuts and don't have to worry about adjustment. 6 1. The rocker arm may have ground radius or a steel roller, and the valve tip is ground perpendicular to the valve stem. Jump to Latest 873 views 2 replies 2 participants last post by bdisanto Feb 25, 2005. 5 1. find zero lash (the point at which you can no longer move Prior to May 8, 1966 were these conventional style cast rocker arms used on the 221/260/289 engines through May 8, 1966. Small Block V8 (221, 260, 289, 5. Another option is to machine the valve stem keeper grooves to early dimensions. I Cutting Ford 289 heads for screw-in studs is a process that involves removing the pressed-in rocker arm studs and installing screw-in studs. Mine are all pumped up, and I would like to keep them this way if possible. Reading the Ford maintenance manual, it shows only a torque value for the rocker arm stud nuts (17-23lbs). You want to take all If it's a rocker arm that's loose, then you would want to go ahead and do what Mike suggested. Use the remote starter to turn over the engine. 152 4. 5/460) - Rocker Arm Adjustments - Hello, I'm in the process of rebuilding a 460 and last night I installed the heads along with new lifters, new pushrods and what was going to be new rocker arms. Each valve is actuated by a single rocker arm that moves in conjunction with a pushrod. I can recall the process after all these years: while running the fully warmed engine with thermostat open and coolant flowing (very important due to oil viscosity effect on the lifters!) tighten rocker arm stud nuts until all valve train is quiet, (engine will be running rough at If you have the stock hydraulic camshaft you can start the engine with the valve cover off on the one you replaced, put some rags on the exhaust manifold, and back off the rocker arm nut until the rocker arms clatters, as you back it off the lifter will have to pump up, so don't get in a hurry, when it stays clattering, turn the rocker arm nut until it quiets down, then go about (All Windsor style small blocks had 1. When the exhaust valve begins to open, stop and adjust that cylinder's intake rocker arm. Edelbrock recommends 1/2 turn past zero lash at bottom of cam lobe. 2: Position of the crankshaft for valve adjustment-260 and 289 engines. You could try running some real light Installing my newly rebuilt OEM 302 heads tonight. 7:1 roller rockers? Thanks. (1. No difference at all. Continue to turn the break bar until that valve you just set (intake valve) is about to get to the lowest point begin to set the other valve lined up with the This mandated the use of poly-lock rocker-arm adjustment nuts, which is an unnecessary expense in our opinion on a stock engine. I've read several instructions on how to adjust the rocker arms. 5/460) - Valve Adjustment & Hydraulic Lifter Questions - I am in the process of adjusting the valves on my 429. I can recall the process after all these years: while running the fully warmed engine with thermostat open and coolant flowing (very important due to oil viscosity effect on the lifters!) tighten rocker arm stud nuts until all valve train is quiet, (engine will be running rough at There you adjust the intake valve (the pushrod not lined up with the header) rocker arm until you can barely twist the pushrod with your fingers (zero lash). I am Find FORD 4. . 7L/289 Rocker Arms and get Free Shipping on Orders Over $109 at Summit Racing! Summit Racing SpeedCard - learn how to get 15% back up to $150 Search Within Results I helped my dad adjust the valves in his '65 Ford Custom 289/3spd several times after engine rebuilds. Make sure you find Top Dead Center Trying to tune and road test my '67 Mustang 289 V8, but for some reason, the POLYLOCKS KEEP COMING LOOSE, and not always on the same cylinder or bank -- sometimes left, other times, right. We install these on a new set of TrickFlow 11R heads, which are going on a cust The rocker shaft is the same diameter on all, so all of the rocker arms will interchange without any problems. This may be determined by rotating and/or moving the pushrod with It states that Valve Lash should be zero between the valve stem and the rocker however "conditions may change the original setting and adjustment may be necessary" "clearance must be determined by measuring the clearance between the closed valve stem and the rocker arm (with tappets empty and collapsed)" 1965-1970 240 (c. amazon. You can order you rockers with this info. 6K views 19 replies 12 participants last post by GT350HR Oct 1, 2018. timing good. Slowly re-tighten that intake rocker arm nut with one hand while feeling the pushrod‘s up and down movement with the other hand. 66coupe289. M. tphan Discussion starter. I had to put new rocker arm nuts on and tried to adjust them today, but I have some Rocker Arm / Valve Adjustment I just installed a new B303 cam in my otherwise stock 302. Rail-type rocker arm with loose fit pushrod hole 289 engines built after mid-1966 and 302 engines use a Make sure to have all the rockers installed but not tightened. Sort by Oldest first Oldest first Newest This will explain how to properly set lifter pre-load with stud-mounted rocker arms; stock, pedestal-mount rockers will generally not need to be adjusted unless you have installed a reduced base circle camshaft. Also the stud size rocker bolt. The picture shows an after market rail-type rocker. The pushrods are of the same length of the ones I removed. they are comp cam's full roller rockers. Loosen the adjusting nut slightly until lash can be felt in the rocker arm. Using an adjustable length checking pushrod you set the height of the rocker arm on the mounting stud so that the pattern the roller tip makes on the valve stem is centered and minimally wide THEN 2. ) Loosen the exhaust rocker arm and follow the same procedure described before in steps 3 and 4 to adjust this rocker arm. One more thing, they all have been heat treated so they are pretty hard. What is the proper method of adjusting these? Do you just torque to a certain ft/lb ? Please Turn the motor over until you see the exhaust valve starting to open; you can now adjust the intake valve. grxrrr fkjcoz xpboq yogwdlf mxcstz shliu szqhzd mxk tbgdgf lha