Question about Chevrolet 1500

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

Installed head gasket. Can't get it to start but rocker arms still need to be adjusted

Posted by Anonymous on

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  • Chevrolet Master
  • 4,977 Answers

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.

Posted on Aug 17, 2015

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Posted on Jan 02, 2017

ZJLimited
  • 17970 Answers

SOURCE: I have a 1996 Buick lesabre with the 3.8 liter v6

zjlimited_2060.jpg

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.

Jose.

Posted on Oct 18, 2011

  • 94 Answers

SOURCE: I have a 2001 chevy

Hello,

You are correct there is no lash adjustment, just the torque. However you do have to rotate the crankshaft balancer to position the crankshaft balancer alignment mark 57-63 degrees clockwise or counterclockwise from the engine front cover alignment tab. No further adjustment is required. By the way I have 22 Ft. Lbs for that torque (probably doesn't matter much) I hope this helps.

Posted on Sep 04, 2011

kamakazekarl
  • 12 Answers

SOURCE: 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

Posted on Sep 06, 2008

  • 1118 Answers

SOURCE: How do I adjust the rocker arms on a 1988 astro

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

ourhowse
  • 2007 Answers

SOURCE: putting distributor back in the right way

Okay. Turn the engine untill you have the crank mark lined up with the 0 on the pointer. At that point, look at the valves on #1 cylinder. They should both be closed, or in the "up" position. If they aren't, you'll have to turn it one revolution, to get to compression stroke. Now, you're ready to put the distributor in. Take the top off the cap, and position it in the hole, so that the rotor lines up with #1 on the distributor cap. If it's a newer one, take a close look inside at where #1 actually is because the newer ones are off set a little. Now, tighten the cap on, and hook up the plug wires, one at a time in the proper order and rotation. When you try to start it, it should run where it is, but you may have to turn the distributor slightly one direction or the other to make it start. Try your best to keep it running for 20 minutes or so the first time so your gaskets will set. ( not always an easy task when the valves aren't adjusted, and antifreeze can still vapour lock on you) If you need to know more, let me know.

Posted on Nov 13, 2009

Testimonial: "Thank you , but still hoping i had it at tdc to start with when i set the rocker arms but checked comp good on all but #1 and #3 "

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1 Answer

How do you adjust the rocker arms on a 1996 jeep grand cherokee 5.2 liter


its in the FSM. want to read that for free.
see chapter marked ENGINE>
chapter 9
ZJ jeep it is.

there is no such thing,
sorry
here ill paste the install push rods/rockers. lines

(1) Rotate the crankshaft until the "V8" mark lines
up with the TDC mark on the timing chain case
cover. This mark is located 147° ATDC from the No.1
firing position.
(2) Install the push rods in the same order as
removed.
(3) Install rocker arm and pivot assemblies in the
same order as removed. Tighten the rocker arm bolts
to 28 N·m (21 ft. lbs.) torque.
CAUTION: DO NOT rotate or crank the engine during
or immediately after rocker arm installation.
Allow the hydraulic roller tappets adequate time to
bleed down (about 5 minutes).
(4) Install cylinder head cover.
(5) Connect spark plug wires.
end. quote.

is this clear?

Aug 25, 2015 | 1996 Jeep Grand Cherokee

1 Answer

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

2 Answers

Valve lash procedure


i need to know how to adjust the valves on 02 pont sunfire

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...


zjlimited_2060.jpg

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.

Jose.

Oct 17, 2011 | 1996 Buick LeSabre

1 Answer

I have a 2001 chevy blazer 4.3 vortec put head gaskets in but cant find the procedure for adjusting the valves. it have rocker arm bolts all i can find is a twenty ft-lb torque is there no adjusting and...


Hello,

You are correct there is no lash adjustment, just the torque. However you do have to rotate the crankshaft balancer to position the crankshaft balancer alignment mark 57-63 degrees clockwise or counterclockwise from the engine front cover alignment tab. No further adjustment is required. By the way I have 22 Ft. Lbs for that torque (probably doesn't matter much) I hope this helps.

Sep 04, 2011 | 2000 Chevrolet Blazer

1 Answer

How do I adjust the valves on a 1998 old bravada 4.3 vortec


You don't. They are non-adjustable hydraulic lifters. GM's spec for torque on the rocker arm nuts: Tighten the valve rocker arm ball studs to 47 N·m (35 lb ft). Once the valve rocker arm nuts are installed and properly torqued, no additional valve lash adjustment is required.

Aug 05, 2011 | Oldsmobile Bravada Cars & Trucks

2 Answers

Good morning changing haed gasket on 1.5 hyundai accent how much torque for head bolts and rocker arm bolts


cylinder head bolts 52-55 ft lbs. engine cold 59-63 ft lbs. engine hot

rocker arm shaft bolts 15-20 ft lbs.

intake manifold bolts 11-15 ft lbs.

exhaust manifold bolts 22-30 ft lbs.

valve cover bolts 79-81 in lbs.

May 12, 2011 | Hyundai Motor 1998 Accent

1 Answer

There is a tapping noise in the motor but its not knocking I think its a lifter it hasent lost any power and its really not getting worse I would like to know what the spec is for tighing down the lifter...


Depends on which engine you have. If you have


ADJUSTMENT Although it is sometimes possible to reuse an old cylinder head cover gasket, in most cases it makes more sense to purchase a new one before beginning the procedure. Some vehicles may require the use of silicone sealant either with or without a new cover gasket. For more details, please refer to the cylinder head cover procedures in Engine & Engine Overhaul of this repair guide and refer to the gasket manufacturer's instructions.

Z24i Engine
See Figures 1, 2 and 3
For the intake valves: 1-4-5-8 valve clearance is 0.012 in. (0.30mm). For the exhaust valves: 2-3-6-7 valve clearance is 0.012 in. (0.30mm). The pivot locknut torque specification is 12-16 ft. lbs. (16-22 Nm).

  1. The valves must be adjusted with the engine warm, so start the truck and run the engine until the needle on the temperature gauge reaches the middle setting. After the engine is warm, shut it off.
  2. Note the location of any wires and hoses which may interfere with cylinder head cover removal, disconnect them and move them to one side. Remove the bolts holding the cylinder head cover in place and remove the cover. Remember, the engine will be hot, so be careful!

fb38656.gif


Fig. Fig. 1: Check the valve clearance with a flat feeler gauge-Z24i engine





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Fig. Fig. 2: Loosen the locknut and turn the adjusting screw to adjust the valve clearance-Z24i engine


1c1d35c.gif


Fig. Fig. 3: With the No. 1 piston at TDC, adjust the top set of valves FIRST; with the No. 4 piston at TDC, adjust the bottom set of valves SECOND-Z24i engine

  1. Rotate the crankshaft until the timing marks indicate that the No. 1 piston is at TDC of the compression stroke. If you're not sure of which stroke you're on, remove the No. 1 spark plug and hold your thumb over the hole. Pressure will be felt as the piston starts up on the compression stroke.
  2. Refer to the accompanying illustration (upper part), then check valves (1), (2), (4) and (6) using a flat bladed feeler gauge. The feeler gauge should pass between the valve stem end and the rocker arm screw with a very slight drag. Insert the feeler gauge straight, not at an angle.
  3. If the clearance is not within the specified value, loosen the rocker arm lock nut and turn the rocker arm screw to obtain the proper clearance. After correct clearance is obtained, tighten the locknut.
  4. Rotate the crankshaft until the timing marks indicate that the No. 4 piston is at TDC of the compression stroke. If you're not sure of which stroke you're on, remove the No. 4 spark plug and hold your thumb over the hole. Pressure will be felt as the piston starts up on the compression stroke.
  5. See the illustration (lower part), then check valves (3), (5), (7) and (8). Check and adjust valve clearance as necessary.
  6. Install the cylinder head cover gasket, the cover itself and any wires or hoses which were removed. Check the engine oil level.

KA24E, VG30i and VG30E Engines
See Figures 4 and 5
These models utilize hydraulic valve lifters. Periodic adjustment is neither necessary or possible. There is however a bleed down procedure that is necessary when the valve train has been disassembled.
HYDRAULIC LIFTER BLEED DOWN
  1. Remove the cylinder head cover.
  2. Check the lifters for proper operation by pushing hard on each lifter with fingertip pressure.
  3. If the valve lifter moves more than 0.04 in. (1mm), air may be inside it. Make sure the rocker arm is not on the cam lobe when making this check.
  4. Install the cylinder head cover.
  5. If there was air in the lifters, bleed the air by running the engine at 1000 rpm for 10 minutes.


4df22a2.gif


Fig. Fig. 4: Cross-sectional view of an installed hydraulic valve lifter-4 cylinder engine


6e01bb3.gif


Fig. Fig. 5: Cross-sectional view of an installed hydraulic valve lifter-6 cylinder engine

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1 Answer

4.3 liter, Rocker nuts back off at idle


I would try using some Loctite Threadlocker, they offer different strengths, removable and non-removable.

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