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How do I adjust the rocker arms on a 1988 astro van. I replaced a head gasket and was told these need to be adjusted, but Im not sure what to do. I have a torch wrench.

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I'am gussing its a 4.3, first you have to make sure the lifter is all the way down on the cam lobe, you can acheve this by rotating the engine by hand, then you tighten the nut on the rocker down until you can bearly turn the push rod and then give it another full turn, do this same procedure on the rest and you are good to go, you do not need a torque wrench to do this just a socket and ratchet.

Posted on Sep 11, 2009

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Im not sure what engine you have but adjusting the rocker arms is generally the same w/ V8 or V6.You will not need a tork wrench.You'll need a 3/8 socket wrench w/ 5/8 socket for the rckr arm nut and 1/2" socket wrench(big long wrench) w/ the socket that will fit the crank pulley bolt to manually turn the engine.Start w/the timing mark on the balancer lined up w/ 0 on the timing tab.With all of the pushrods in place and the rckr arms loosely in place put the adjusting nuts on the studs by hand just a couple turns.Your only going to adjust the rckrs w/pushrod that are the furthest down.The #1piston should be at top dead center and the #1 intake and exhaust pushrods should be both equal distance up.Adjust all rckr arms that are this far down.Rotate the engine 180 degrees(1 turn)to line the timing mark again and adjust the rest of the rcker arm nuts that werent adjusted.TIP:When youre turning the engine by hand you'll see some pushrods/rockers start to move down.when they stop moving down this is the place where they should be for adjusting and thats usually when the timing mark lines up.Now to adjust grab the pushrod you are adjusting w/thumb and index finger so you can spin and move it up and down.With 5/8 wrench in other hand start to tighten rckr nut to just where you cannot freely spin or move up and down the push rod(zero lash).Then for final adjustment tighten the rckr nut 1/2 turn.Do this to only the pushrods that are all the way down,turn the engine once and adjust the remaining rckr nuts

Posted on Sep 11, 2009


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Ok so ik I'm posting allot haha but does anyone know where or how to adjust lifters just found out mine r just now needed adjustment in near mount Vernon WA or a price at least haha

In engines with rocker arm valve systems, the procedure I'm familiar with is to remove a rocker arm cover, and (one at a time!) while the engine is running, slowly back off the rocker arm retainer nut or bolt just until you hear the lifter tapping, then tighten it a quarter turn. If you can identify a lifter that is already tapping, tighten its rocker arm slowly until it stops tapping, then adjust it. Do not over-tighten! This can damage the engine.

Listen carefully to how the engine sounds; if it starts to stumble when you tighten a loose rocker arm, you've gone too far. If you cannot get the engine to run well without tapping, you may have too much wear in the valve train and may be due for a head overhaul, or you don't have adequate oil pressure in the lifters in question.
Repeat until all rocker arms are done. Replace the rocker arm cover using a new gasket, then (in a V-engine), repeat the procedure on the other side of the engine.

Wearing safety goggles, or better yet, a transparent face shield, is strongly recommended. Sometimes oil will squirt out a considerable distance from the lifter side of the rocker arm during adjustment, and the direction is not readily predictable.

Apr 03, 2015 | Cars & Trucks

1 Answer

How tight do lifters need to be in a 1988 honda dx

.008" intake, .010"exhaust, turn engine to tdc #1 compression, adjust #1 cyl rocker arms, turn crankshaft 180 degrees and adjust #3 cyl rocker arms, rotate another 180 degrees & adjust #4, than another 180 to adjust #2.

Mar 30, 2014 | Cars & Trucks

1 Answer

What is the torque specs for the rocker arms and head on a 1988 GMC SIERRA V-8 SHORT BLOCK?

everything you need below.
NOTE: Rocker arms arent under torque. You can google the process to adjust them, but just enough to take the slap out.... too tight and the valves will go stupid.

Sep 22, 2013 | Chevrolet C1500 Cars & Trucks

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Bad rocker arm

could be lifter not charging of is not adjustable. or push rod out of lifter

Sep 20, 2013 | Pontiac Grand Prix Cars & Trucks

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1996 vortec 5.7. how do I adjust rocker arms when the motor is cold?

these are adjusted the same way 5.7 litre motors have been adjusted since GM started making this size of motor. with every thing in place tighten rocker nuts down until about 1/16" threads is protruding above nut. once the car starts allow the engine pressure to build and oil is squirting around rockers. then with engine running tighten down rockers that are noisy until the noise has just gone. then back off nut until it starts to clatter then tighten 3/4 of a turn. repeat to all the other rockers and your done.

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Valve lash procedure

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Nov 20, 2011 | 1991 Chevrolet K1500

1 Answer

I have a 1996 Buick lesabre with the 3.8 liter v6 motor. I just did a top end gasket set and need to know how to adjust the rocker arms. Can anyone help? I know I need to start on compression stroke to...


Fig. 7: Rocker arms and related components - 1991-99 VIN L engine and 1998-99 VIN 1 engine (click image for zoom)

  1. Clean the rocker arms and pedestal bolts in a suitable solution and inspect for wear. Make sure to clean all of the thread adhesive from the rocker arm pedestal bolts.

To install:
  1. If removed, install the pushrods and make sure they seat in the lifter.
On 1998-99 vehicles, the bolts rocker arm bolts are designed to permanently stretch when tightened. The correct part number fastener must be used to replace this type of fastener. Do NOT use a bolt which is stronger in this application. If the proper bolt is not used, the parts will not be tightened correctly, and part or system damage may occur.
  1. Apply a threadlocking compound to the bolt threads before reassembly.
  2. Install the pedestal and rocker arm assemblies, then tighten the retaining bolts as follows:
    1. 1988-92 vehicles: 28 ft. lbs. (18 Nm).
    2. 1991-98 vehicles: 19 ft. lbs. (29 Nm), plus an additional 90° with a torque angle meter.
    3. 1999-99 vehicles: 11 ft. lbs. (19 Nm), plus an additional 90° with a torque angle meter.

  3. Install the valve cover(s), as outlined earlier, then connect the negative battery cable.
  4. Start engine and check for fluid leaks and listen for valve train noise.
I hope this helps, and just keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment.

Have a nice day and thanks for using FixYa.


Oct 17, 2011 | 1996 Buick LeSabre

1 Answer

Rocker arms

Hello antcarrol,
I'm, thinking you may mean cam rocker arms (lobe followers) and like the saying goes, "1 picture is worth a thousand words". These arms fit below cam shaft and sit over valve springs with a small round disc shaped spacer. These spacers are notched so the follower rest on valve. The other end of follower sits atop of the lash adjuster, The top of this adjuster is globed shaped to fit securely to the follower while allowing the correct lash adjustment by two hex nuts on the adjuster.
Confused yet? Well its not easier said than done. If you have access to a shop manual hopefully picture will help Good luck and I hope I have helped. Kam

Jun 04, 2008 | 1990 Acura Integra Hatchback

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