Question about 1996 Pontiac Firebird

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Rocker arms 1996 firebird 3800 series two

I replaced all twelve lifters and i would like to know if it matters about the rocker arms and over which valve they should be placed there were numbers on the bottom

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No they are all the same ..though putting them in original positions is recommended
http://www.thinkythings.org/3800/12-rockers.jpg

Posted on Oct 25, 2008

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2 Answers

What's causing valve tapping?


Some tapping is normal with age and mileage. Wear on the cam and lifters and followers causes it.

Apr 08, 2016 | Cars & Trucks

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

If ticking sound don't go away after flushing oil change is there a need to repair engine


Ticking sound is typical of slack in the valve train. Try using a wood dowell "stethescope" and touch it to the rocker arm cover over each cylinder. If a rocker arm adjustment is too slack, you'll hear a clicking sound rather than a muted murmur. If you find the noisy lifter you will need to remove the rocker arm cover and adjust it. CAUTION NOTE - It is possible that a hydraulic lifter may have some grit in the internal valve. That would stop the lifter from functioning properly.

Mar 06, 2015 | Cars & Trucks

1 Answer

Ticking noise while in drive getting worse, been told that noise coming from bell housing?


Valve Adjustment

Print
The 4.2L and 5.3L engines do not require a periodic valve lash adjustment.
The 4.3L engines are equipped with screw-in rocker arm studs with positive stop shoulders. Because the shoulders that allow the rocker arms to be tightened into proper position, no adjustments are necessary or possible. If a valvetrain problem is suspected, check that the rocker arm nuts are tightened to 18 ft. lbs. (24 Nm). When valve lash falls out of specification (valve tap is heard), replace the rocker arm, pushrod and hydraulic lifter on the offending cylinder.

Oct 23, 2014 | 2003 Chevrolet TrailBlazer

1 Answer

Broken lifter arm 96 honda prelude?


Interesting question. If you think a lifter arm, which I presume is also called a rocker arm, is broken, remove the valve cover and find it. All the rocker arms are visible, and should be easy to see.

May 05, 2014 | 1996 Honda Prelude

1 Answer

Lifters sound loud on 2011 Ultra Classic


This car has hydraulic lifters( tappets} therefore should not adjustment, you probably have a bad or weak lifter. But, in any case you have to remove the valve covers to make the adjustment. You will see the adjustable bolt on the rocker arm. rotate the engine until the valve is all the way to the top, [no tension on the valve spring] then place a feeler Gage in between the rocker arm and the valve stem, adjust the rocker arm until the feeler Gage is snug but not tight. Do this with each valve. Check the book for the correct Gage to use but I think it is a .018.

Oct 05, 2012 | Cars & Trucks

1 Answer

I replaced the lifters in my 2000 galant 2.4 L and i need to know what to torque the rocker arm shafts to.


1.5 and 1.8 engines:
* Install the rocker arm and shaft assemblies. Tighten the rocker arm shaft retainer bolts to 23 ft. lbs. (32 Nm).

* Check valve adjustment and install the valve cover. Tighten the valve cover bolts to 16 inch lbs. (1.8 Nm) for the 1.5L engine or to 29 inch lbs. (3.3 Nm) for the 1.8L engine.



2.0 engine
* Lubricate the rocker shaft with clean engine oil and install the rockers and springs in their proper places.

* Install the rocker shaft assemblies on the engine. Tighten the bolts gradually and evenly to 21-25 ft. lbs. (29-35 Nm).



2.4 engine

fa2bc50.jpg

Fig. Rocker arm shafts and components-2.4L engine



* Fit the rocker shaft springs from above and position them so that they are at right angles to the plug side. Install the rocker springs before installing the exhaust side rocker shaft and rocker arm assembly.

* Install the exhaust side rocker shaft assembly in the engine. Tighten the rocker shaft mounting bolts gradually and evenly to 23 ft. lbs. (32 Nm).
* Remove the lash adjuster retaining tools.
* Install the rocker cover and tighten the mounting bolts to 30 inch lbs. (3 Nm).

* Reinstall the spark plug wires to the spark plugs.



Hope helps.

Sep 06, 2010 | Mitsubishi Galant Cars & Trucks

1 Answer

Rocker arm failure


Did the timing belt break at one time? Aside from the obvious of it sounding like your son did what mine did and tried to race the vehicle beyond it's abilities if the timing belt broken at one time it may have damaged the valves. If the valve impacts the cyclinder it is possible that it can damage the rocker and cam. When you pull the head off this time have the head re-worked and valves replaced. This should solve the problem.

Sep 12, 2009 | 2007 Chevrolet Cobalt Coupe

1 Answer

'89 2.9l, 194,000 mile Ranger


Stuck Valve.Or just about ready to stick.

Oct 12, 2008 | 1988 Ford Ranger

1 Answer

Datsun stanza 1980 tappets (lifters)


This car has hydraulic lifters( tappets} therefore should not adjustment, you probably have a bad or weak lifter. But, in any case you have to remove the valve covers to make the adjustment. You will see the adjustable bolt on the rocker arm. rotate the engine until the valve is all the way to the top, [no tension on the valve spring] then place a feeler Gage in between the rocker arm and the valve stem, adjust the rocker arm until the feeler Gage is snug but not tight. Do this with each valve. Check the book for the correct Gage to use but I think it is a .018.

May 15, 2008 | 2006 Datsun Stanza

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