350 chevy valve adjustment procedure. By Engine Builder. When you get to your preferred lash, hold the adjuster nut in place and set it with the inner screw using an Allen wrench. V6: Intake 1, 2, 3. Nov 12, 2013 · or Mercruiser way. Guy. A total,of one full engine revolution is all that's required to adjust all 16 valves. Step 2. The internal temp will still be warm/hot (lifters). 5. Jun 24, 2010 · 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. they tell you to turn the engine over to #1 TDC compression stroke and adjust the following valves : Exhaust valves on cylinders # 1,3,4,8 Intake valves on cylinders #1,2,5,7 Turn engine to the #6 TDC compression stroke and adjust: Jul 27, 2008 · With the engine on the compression stroke, adjust the exhaust valves of cylinders No. When adjusting the lifter preload on a hydraulic roller camshaft, special care must be taken to account for lifter bleed down. Sep 12, 2014 · The firing order of a chevy inline 6 is 1-5-3-6-2-4. Turn the rocker arm nut Aug 9, 2009 · Remove valve covers; start engine; loosen each until it clatters, then tighten it just until it stops; go through all 16 as quick as you can to minimize the mess. Then rotate engine. 700″ diameter. Turn off the engine. Rotate engine until exhaust valve begins to open. Measure and adjust the clearence when the rocker arm pad is on the bottom of the cam. Just loosen the bolt, or bolts, that tighten the jam nut, loosen the set screw in the jam nut, and set the clearance with the feeler gauge. 640 crank degrees for a complete cycle of all 8 cylinders. 4 firing position and should be rotated one revolution to the No. Jan 12, 2021 · In this video, he brings us tips on how to adjust valves, whether you’re setting lash or preload. Oct 18, 2014 · I think the Chilton manual says 1. You'll find that sometimes when you tighten the set screw or the bolts on the stud girdle, that the lash Jan 31, 2010 · Valve adjustment on 1997 350 vortec suburban. Watch the procedure for properly adjusting valves. Do this for all 8 valves then go back and turn them ALL down 1/4 more turn each. Feb 14, 2021 · With the engine on the compression stroke, adjust the exhaust valves of cylinders No. Tags: Chevy, valves. Jan 7, 2010 · I have an 1989 G. watch this video in its Mar 23, 2016 · Setting the valves on a small block chevy with hydraulic lifters. htmlBasic Engine Building DVD - Chapter 49: Valve Lash Adjustmen Mar 27, 2011 · Valve Adjustment Procedure. The Service Manual instructs you to do it with the engine off. I have adjusted them 4 times with going to TDC #1 and adjusting the approprite valves. Apr 10, 2021 · How to adjust Chevy Small Block hydraulic cam valves the right and easy way. Loosen the rocker arm nut, set the valve lash to the recommended spec, and tighten the nut. Apr 10, 2004 · Loosen an adjuster nut until the lifter clacks. Tests at Crane R&D have consistently shown best performance (for hydraulic roller cam valve trains) occurs with the preload set at 1 ¼ - 1 ½ turns down from zero lash. A. 1 firing position, the following valves can be adjusted: V8: Exhaust 1, 3, 4, 8. 030 for Exhaust. Apr 27, 2022 · If your fast you can do it before the oil gets on the exhaust. Jun 11, 2023 · Most vehicles built after 2000 will automatically adjust the idle air control valve. The clearance is correct when the gauge is a close sliding fit between the two parts. At this point, stop and adjust the intake valve on the same cylinder. rocker arm and adjust to zero clearance between rocker arm and valve tip. “Work on one cylinder at a time,” says Mark. To set preload, merely tighten the adjuster nut another half-turn after zero lash. A single valve cover is located on either side of the intake manifold. Dec 31, 2015 · Follow this procedure to adjust each intake valve according to the firing order. then #3, then #6, and on and on. 25 turns. These lifters have . Ok, Now listen close the small block V8 has both cyl #1, & cyl #6, at top dead center at the same time, when the crank timing mark is at TDC. Remove the oil splash prevention apparatus and re-install the valve cover. Make sure the lock nuts still grip tight, as it should take maybe 5-10 ft lb to make them turn. This works on all engines with adjustable valve train. I removed the cap to make sure it is at the appropriate I show and discuss that just changing the Modulator may not help anything. Repeat for all valves. Nov 1, 2017 · Me,I like to adjust hydraulic lifters "cold" with the engine off,via the Motors or Chilton's manual method-. Rotate the crankshaft to Top Dead Center (TDC) on the compression stroke for the cylinder you’re adjusting. Need valve adj specs for 396/375h eng w/solid lifters hot & cold if possible. Aug 2, 2016 · The paper recommends 90 degrees after compression stroke TDC for the respective intake valve, and 90 degrees before compression stroke TDC for the respective exhaust valve. 7-liter (350-cubic-inch) engine employs an overhead valve design that requires occasional maintenance. 7. May 9, 2019 · Quick fool proof way to set the valves on your Small Block (and Big Block too) for initial start up. He rebuilt this small block Chevy 350 which Mar 16, 2019 · After a new engine has been started and the initial break-in procedures complete, re-adjust the valves with it at operating temperature. While rotating the pushrod, turn the adjusting nut inward until all the lash is removed. Nov 14, 2023 · In the world of automotive engines, valve lash plays a crucial role in determining engine performance. I had to do a top block rebuild on a 350 waaay back in the 90's. Print. May 21, 2022 · In this video, Ryan shows you how to install push rods and rocker arms and how to set valve lash on a Chevy 350. This will place the lifter plunger in the center of its travel. Next,set your engine on. Jul 21, 2006 · The proceedure is as follows: IMPORTANT LS1 VALVE ADJUSTING TIPS . swap covers, adjust put good cover back on. Check the COLD settings. Tighten the rocker until you can roll the pushrod between your thumb and forefinger with the slightest bit of resistance. any tips???? thanks. If it has play more than likely it could have a solid lifter cam. Finally, tighten with an adjustable torque wrench This progressive procedure will ensure that you are on the base circle on ANY OEM Chevrolet cam for adjustment, and the factory-recommended clearance on other OEM Chevrolet small-block solid-lifter cams should be factored as well by the 1. (see information above) Continue (repeat) this procedure on each of the remaining the valves. E. May 10, 2012 · Just form it around all of the rocker arms and make sure oil drips into the head and not down the side of the motor, leave a gap in the middle for the socket to the nut. Here’s how to do it right Jan 18, 2007 · Here is the way I have adjusted hyd. Slowly re-tighten the adjusting nut until the clicking stops. Nov 14, 2010 · This is different from flat-faced lifters which perform best at zero 0 to ½ turn of preload. This instructional video describes two different methods of adjusting valves on engines with solid lift camshafts. Jan 7, 2021 · There is a ton of information out there for adjusting valves, and it can be very confusing at times. 572-Inch Blown Big-Block Chevy Engine Makes 1,013 HP on the Dyno! Steven Rupp | May 31, 2024. 37:1-vs. After engine has been warmed up to operating temperatures, remove valve cover and install a new valve cover gasket ton cylinder head to prevent oil from running out. Snug the jam nut and check again. Two of the bolts are located on the top of the cover, while the remaining two are on the bottom. “If you talk to ten different mechanics, you’ll get ten different ways to set lash on your engine,” says Smith. Sep 16, 2006 · 3. Then turn ¼, and tighten another ½ turn. Bring #1 piston to TDC on compression stroke. M. With engine running at idle speed, back off valve rocker arm nut until rocker arms start to clatter. Jan 16, 2008 · With the engine in the No. Loosen the adjusting nut of one valve until you hear it "clicking". #1 · Dec 1, 2015. When all play has been removed, turn adjusting nut one more turn. Grab the pushrod and see if it has up and down play in it or if its solid and can't spin. EXHAUST on cylinders 1,3,4,8. the compression stroke. Aug 18, 2023 · Adjustment lash valves adjust. One of the most popular Chevy engines is the 350 Chevy, which has been around for decades and has proven to be a reliable and robust engine. Now slowly tighten it until the click stops. comp rockers https://www. The above procedure assures correct hydraulic lifter preload. Adjust the number six intake and exhaust. Street Performance: The Street Performance hydraulic lifters are made from a cold formed body with a clipped axle and have a 6500 rpm capability. 1 firing position: exhaust 1, 5 and 6; intake 1, 2 and 3. Whether you’re a newbie mechanic or a veteran DIYer, we provide Jun 2, 2020 · A Quick How to for Adjusting your Small block 350 Valves into spec! This information can be used for other Push rod/ Hydraulic tappet lifter setups too! Sep 26, 2022 · Instructions for adjusting the valves with an engine using either a hydraulic or solid camshaft is the same procedure (for example, Chevy 350, and others), as far as when we perform the adjustment. With the engine in no. Ideally you want the push rod, valve, and an imaginary line drawn from the push rod seat in the rocker arm to the top of the valve tip to be at theoretical 90° angles to one another (90°/90° is not really possible-more like 110°/110° with the Chevy small block's 23° valve angle) at 2/3rds cam/valve lift. I found some info. Small block chevy valve adjustment made easyWhat is the correct procedure for setting the valves on a chevy 350 Valve adjustment 350 chevy engine torque rocker lash adjust 1994 truck adjusting remove warm cover350 chevy valve train identification. A) Following the proper firing order for your engine, turn the crank. Specifically, in the case of the Small Block Chevy (SBC) 350 engine, understanding and adjusting valve lash is of utmost importance. It's a Feb 28, 2012 · Tighten the poly-lock of the rocker arm until the proper lash is found. Intake cylinder #1 valve full lift. 1. Valve Lash Adjustment – 5. shaft until the first cylinder listed in the firing order is at TDC on. Repeat this procedure for the remaining valves. Go a bit more so that the lifter can fill itself with oil. Feb 28, 2007 · EOIC--Exhaust open,Intake closed. 1 position. Here's a pic of a static valve adjustment sequence I constructed for a buddy. Check the clearances of numbers 1, 2, 3 and 5 valves by inserting the blade or blades of a feeler gauge between the rocker and valve stem. Other makes may be similar, just follow the correct firing order. 060 of preload in a typical hydraulic Lifter. The Chevrolet 5. There are many other ways guys use to Mar 18, 2016 · One way states that you must start with the Lifters on the Base of the Camshaft. Adjust valves by backing off nut until lash is felt at the pushrod, then tightening nut until all lash is I show a simple way to adjust you valves, or alteast how i do it Sep 10, 2011 · 396/375hp valve adj. The poly-lock adjuster nut adjusts the amount of valve lash while the set screw locks it into place. Jun 25, 2020 · This is zero lash. Nov 9, 2020 · This is the procedure on how to set valve lash on a Chevy 350 engine. Jul 1, 2010 · Turn the adjusting nut ½-turn past this point, giving you optimal pre-load for the rocker arm, pushrod and lifter. #1 · Sep 7, 2005. From this point turn adjusting nut down (clock-wise) 1/4 turn more for final adjustment. 024 for Intake and . Then another 360 degrees with #6 at TDC and adjusting those valves. After adjusting valves on your small-block Chevy, run the engine. 030-. V6: Exhaust 1, 5, 6. Jul 31, 2017 · The Lash Effect: Solid lifter valvetrains depend on accurate lash to make maximum power and dependability. ” Follow this procedure by carefully adjusting each intake valve according to cylinder firing order. This adjustment will maximize power throughout the RPM range and increase the May 7, 2009 · 4,745. pick a cylinder to start with i usually use #1 because it will follow right through with the firing order after that. Adjust intake valve on #2 and #7;exhaust valves #4 and #8. This is the third cylinder from the front on the passenger's side of the engine. Corey banned permanently on 3-6-20 for continued abuse and generally being a time-wasting PITA. past zero lash. When adjusting your valves, tighten all adjusting nuts until alllash is. Go 1/4 more turn and move on to then next valve. This procedure is done with the engine idling. According to Newman, “you should look for . Video unavailable. Number 1 firing position: Intake numbers 1, 2, 5, & 7 as well as exhaust numbers 1, 3, 4, & 8. 10. Everyone thinks their way is the right way, which it ver Oct 15, 2023 · To adjust lifters on a chevy 350, use a feeler gauge to measure the valve clearance and adjust as needed. Tighten an additional 1/4 to 1/2 turn. Plus I don't have my rocker arm oil deflectors anymore. the rocker arms on the studs and tighten the adjusting nuts to. But this proper method requires rags and oil deflectors on rocker arms because of the oil being pumped out from running. When the exhaust valve begins to open, I stop and adjust that cylinder's intake valve. 3L engine code "Z" that I need to adjust the valves on please! Preferably a procedure on a cold engine. This is a hydraulic cam engine. then start it up and adjust valves ( a little less messy) 64 Chevelle Malibu retromod 327 turbo2004r 12 bolt with 355 gears. The proper way is to have engine running at operating temperature, adjust each push rod for silence, then additional one turn. 2 posts · Joined 2005. You must complete this process to reset the IAC if you drive a pre-2000 GM vehicle, including a Cadillac, Chevrolet, or GMC. Re: Timing and Adjusting Roller Rockers 350 SB 5. U pick 'em. Step by step valve adjustment Mar 20, 2016 · the MOST SIMPLE way to adjust valves on the SBC/350 chevy or any other hydraulic lifter engine Mar 21, 2023 · This is a crucial maintenance procedure that ensures your engine runs smoothly and efficiently. What is the advantage to doing it running? Danke! Feb 13, 2023 · When spinning stops, add an additional 1/4-1/2 turn. 2. With that said, set the engine up on cylinder 1 TDC. Print it out and use it if ya like it. Mar 4, 2012 · Start at TDC for the #1 cylinder and adjust it's valves, then rotate the engine clockwise 90* and adjust the valves for the next cylinder in the firing order, which is 8. Turn adjusting nut until all lash is removed. Feb 1, 2007 · To adjust the exhaust lash, turn the engine over until the exhaust valve has completed its lift cycle and the intake valve begins to close (IC). Street Rod Pix. Adjusting the clearance between the valve stem and rocker arm, a process known as setting valve lash, can be complicated. amazon. These are attached to the bottom of the air cleaner. If you want to be quick about it bring the number 1 piston at Top Dead Center (TDC) on compression stroke. to/2riusXYIn this video I do a valve lash adjustment with the motor running. Remove both of the valve covers. Rotate push rod and tighten rocker arm until you feel it start to drag and then go 1/2 turn more. Hold the pushrod between your fingers and spin it while tightening the adjustment nut on the rocker arm. As the intake valve opens, then begins to close, as the intake valve is almost closed, set lash on the exhaust valve. Save Share. This procedure is similar to most Chevy small block engines and could be used for gener Feb 25, 2013 · I tried following the repair procedure in the chilton's repair manual but now the engine has a distinct ticking sound coming from the engine valve cover area that I did notice before. 5:1 ratio difference at the lash point and rounded-down to the next-nearest Dec 14, 2007 · Buy the "Basic Engine Building" DVD http://store. now watch the intake side when it comes up and then goes almost all the way Chevrolet V-8 engine. With the engine in the #1 firing position, adjust the exhaust valves for cylinders 1, 3 4 and 8 and the intake valves for cylinders 1, 2, 5 and 7. You must adjust your valves first! Dec 5, 2013 · Got the heads back from machining, installed new gaskets and heads, push rods etc. Back out the adjusting nut until lash is felt at the pushrod, then turn the adjusting nut in until all lash is removed. Shut engine off; add your desired preload (could be anywhere from ¼ turn to a full turn, with most people using about ½ turn most of the time); reinstall valve covers; enjoy. Dec 13, 2011 · Also, the stud girdle needs to be on when doing the adjustment. Mar 12, 2007 · The first is adjusting valves when you know the cylinder is on top dead center. Provided those marks are correct the intake and exhaust valves will be closed. “It’s not that any of those are wrong, just that they all require certain specific knowledge and reference materials right Dec 16, 2009 · For hydraulic, you are right - tighten to 0 clearance as indicated by lifting the rocker up and down at the valve, until movement stops, then go another 1/4 to 1/2 turn. Nate's 216/235/261 Valve Adjustment Procedures. removed by feeling the rotation and up and down movement of the pushrod. Turn the rocker arm nut counter clockwise until valve lash is felt in the valve pushrod. he's in the mood to change out the cam and put roller rockers on the heads. 1, 3, 4 and 8 and the intake valves of cylinders No. to/2sPzqNEFEL-PRO VALVE COVER GASKET: http://amzn. You can also get a piece of card board and cut it to length to fit in head on valve spring side, make it about a foot tall. 7L. If you can't spin it its probably a hyd cam. Repeat this procedure for each of the other seven cylinders. Oct 26, 2002 · INTAKE ADJUSTMENT: I Hand turn the engine in it's normal direction of rotation while watching the exhaust valve on that particular cylinder. May 29, 2020 · This playlist is to help understand how to adjust valves and replace valve springs on a Chevrolet, GM 350 engine, including the 350 crate engine 602 series, Oct 20, 2016 · This puts the intake lifter on the base circle of the lobe so we can set the intake preload. The video also briefly talks about firing Aug 25, 2011 · Basically as the exhaust valve begins to open, set lash on intake side. Chevrolet V-8 engine. Starting at # 1 piston rotate the engine until the rocker arm starts to open the exhaust valve then check/adjust the intake lash. Jun 10, 2017 · MY CAMERA: http://amzn. Using a long handled ratchet or breaker bar attached to the crank bolt, turn the engine over in the clockwise direction. . Each valve cover is attached to its cylinder head with a total of four bolts. . I can do them hot if I have to, but I don't want the mess. I have spent 3 weekends on trying to adjust the valves on my 1997 suburban 350 vortec. This 90 degree adjustment in lash measurement point intended to assure the lash clearance is measured at the lowest point of the cam lobe base circle. with #6 cylinder Intake Valve at full valve lift . i don't have any procedure for adjusting the valves with roller rockers. achieve zero lash (with no preload and no pressure on the valves). Oct 12, 2015 · Adjusting Valve on a Small Block Chevy. " Rotate the engine another full turn. I have always done 3/4 turn. With the intake preload set, now bump the engine until the intake valve is halfway closed (IC). 1/2 turn is recommmnded for low perf and stock rebuilds. -1. Remove the four bolts with a wrench, then lift the valve Jul 1, 2010 · Turn the adjusting nut ½-turn past this point, giving you optimal pre-load for the rocker arm, pushrod and lifter. It breaks the cam – and then readjusts while the engine is still running. 350/300 M20 12 Bolt 3:73 Posi. To adjust the exhaust rotate the engine until the rocker arm has fully opened the intake and is 1/2 to 2/3's of the way back down. The rotor should now be pointing to the number six cylinder. I do it with engine off and the "lash half the valves then rotate engine 360 and do the other 1/2" method listed in FSM and Haynes service books. Dec 4, 2009 · Howdy, I know most of you guys on the forum have your engines running while adjusting valve lash. Adjust the following valves with the engine in the No. TDC #1, pointer at "0". Mar 31, 2018 · Adjust #6 Intake Valve. my son bought a 55 buick with the drivetrain from an 84 camaro 305. In this article, we’ll take a look at the 350 chevy valve adjustment sequence. flat tappet cams. The engine's firing order is often the starting place, with the number 1 cylinder's intake valve then its exhaust valve, followed by the next Turn the wrench an additional 1/8 – 1/2 turn to set the plunger depth to the proper lifter preload. Next morning, come out and HAND rotate the engine, and bring it back to the two valves you set hot, by E-O, I-C. Dec 12, 2007 · If rocker arms are moving, engine is in the No. And adjust the Intake and Exhaust valves associated. You could remove the drivers side valve cover off and rotate the engine so #1 comes up at TDC compression stroke. This video is unavailable. Adjust the following rocker arms in the same manner: Intake valves "2, 5, 7" and the exhaust valves "3, 4, 8. I'm used to the screw and locking nut type but am at a loss as to this type of procedure. Thanks for the reply. Jun 7, 2009 · 6NOVA4. Starting with #1 cylinder, turn the engine over until the exhaust pushrod just begins to move up. watch the exhaust side when it just starts to move up or open adjust the intake to zero lash plus 1/4 to 1/2 turn on the nut. Nov 8, 2005 · That procedure will work on any sbc/bbc that has a hydraulic cam in it. In this article, we will delve into the significance of valve lash and provide a brief overview of the SBC 350 engine. Turn rocker arm nut down slowly until the clatter just stops. Now, go do the rest of the day, dinner, TV, sleep. Rotate crankshaft 180 degrees clockwise and adjust intake valve on #1 and #8; exhaust valves #3 and #6. com/product/u Dec 1, 2015 · 4102 posts · Joined 2011. #14. that the valve in the transmission case may be the issue. 120″ plunger travel and have an 80% fill rate with the test oil. Morel Hydraulic Roller Lifter Adjustment Procedure. This will ensure the intake lifter is on the base circle of the cam. net/Basic-Engine-Building-DVD_p_8. Now, the exhaust lifter is on the base circle Step 5. Aug 30, 2019 · Valve Adjustment With Engine RUNNING! - 1995 Chevy GMC TBIIn this video I try to cure a ticking or clacking noise I've been getting with this engine since th Mar 22, 2007 · that valve adjustment procedure usually doesnt work well on performance cams. 6. Published: Oct 12, 2015. Now you can set the preload on the exhaust. 3. With the first cylinder finished, you can move to the adjacent cylinder and run through the process again. We will explain the step-by-step process to help you properly adjust the lifters on your chevy 350 engine. 1, 2, 5 and 7 by performing the following procedures: Back out the adjusting nut until lash can be felt at the pushrod. boxwrench. “Setting the intake valve and the exhaust valve for one cylinder at a time is ultimately the best way, and works no matter the engine or the camshaft. After the break-in, when the engine is idling, loosen the rocker till you hear a click. If you are setting the lash on a mechanical lifter camshaft, use the appropriate feeler gauge between the valve tip and the rocker arm and adjust the lash until there is a reasonable tug or pull on the feeler gauge. Install. marathonman Discussion starter. com/gp/pro Mar 22, 2015 · 350 Chevy valve adjustment while car is running Feb 23, 2012 · hydraulic camshaft and no specifications are available, turn the rocker arm adjusting nuts 1/2 to 3/4 of a turn. The camshaft determines which one is going to fire at that time. Even better but takes 3-5 minutes more is an old cover with 1 inch holes where the nuts are. Plug the vacuum lines with golf tees or other suitable item. This is a critical, often overlooked part of the tune up of your old GM 6-cylinder engine and it can make a world of difference in how that worn-out engine runs - you may find after doing this adjustment that your old StoveBolt runs so well you decide to ignore the smoking and just run it as is Step 1. B. V8: Intake 1, 2, 5, 7. Jun 3, 2010 · C3 Tech/Performance - 350 LT-1 1972 Solid Lifter Valve Lash Adjustments? - Aloha! Can anyone give me the proper set up sequences and valve lash adjustment settings for Intake/Exhaust settings for my mechanical lifter LT-1? I've read/heard, after run up to normal temps, . You can now adjust the following valves: INTAKE on cylinders 1,2,5,7. Adjust #1 Intake Valve. Oct 13, 2023 · Pull both valve covers off, and use the E-O, I-C to set ONE valve pair, at their respective HOT clearances. Rotated the crankshaft one turn and adjusted I-3,4,6,8 and E-2,5,6,7; I did everything according to the book, 1/2 turn more after lash was removed once I was done adjusting Mar 18, 2013 · run the motor until it gets to operating temp. shut off and let cool enough so you can comfortably remove valve covers. May 7, 2009. you can NOT adjust #1 with the valve at full lift. 4. 1 firing position I adjusted intake 1,2,5,7 and Exhaust 1,3,4,8. Remove the wing nut on top of the air cleaner and lift the air cleaner off the throttle body to access the vacuum lines. Good for firing order 1-8-4-3-6-5-7-2 (chevy of course) However, I oriented the numerals on the pictorial banks to help indicate the relative position of each valve on a BBC. At this point tighten between an additional Jan 31, 2008 · This method works very well for a running engine. Twist and pull the vacuum off of the bottom of the air cleaner and lay the air cleaner aside. A forum community dedicated to 1st generation Chevy Camaros owners and enthusiasts Feb 29, 2008 · I'm replacing my stock rockers with rollers and need to know how to adjust them. The repair started with replacing the valve seals because of a lot of smoke during initial start up that eventually went away after running the truck for a few minutes. The other states that you position the Cam at its Peak , Toe or Nose and adjust. Continue rotating clockwise 90* and adjusting through the firing order. over on a GM Death-10 web site, but there is conflicting issues on the subject! Go figure. I tried Sep 7, 2005 · M. The lifter wheels in this series are . In this case you should be able to rely on your engine timing marks when you are on cylinder 1 and then rotating the crankshaft 360 degrees to cylinder 6. This way you know your getting the lifter on the heel of the cam lobe for proper lash adjustment. Done. valve lash adjustment on a chevy 307. EOIC ! then IOEC. Like. UTG T-Shirts Here: https://uncletonysgarage. Tighten the adjusting nut until the slack is taken out of the rocker arm and pushrod. SLOWLY turn the nut back down until the clack diminishes then stops. Set the intake valve. Rotate, clockwise (by hand) until the rocker arm just starts to move the exhaust valve open. Oct 29, 2023 · To adjust Chevy 350 valves, start with a cold engine. it fp lu zc kx zs rz ei oe zj