rocker arm replacement
06-12-2019, 08:59 AM
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rocker arm replacement Hi,i changed my rocker arms because i found a needle bearing in my oil.So i replaced them and adjusted as per gm specs and torqued them down in sequence and also rotated crank 360* to do them all at 22lbs.unfortunately when i started it up,i had alot of clatter.before i adjusted them i finger tightened them and then torqued in sequence.Any idea what i might have done wrong and what is the proper procedure.Yes i did put #1 cylinder at tdc.thanks
06-12-2019, 01:12 PM
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new stock rockers with caged trunion bearings.stock motor.when i started it up after storage and even when i put it in storage,there wasn't any valvetrain noise even though i had a broken rocker.now after changing the rockers and doing another oil change i have alot of rocker noise.they may not be adjustable but they still have to be torqued or tightened down someway as i did it the way gm says
06-12-2019, 02:24 PM
#4
just gonna have to yank the valve covers off and see whats loose, you cant really mess it up so may be a part failure if your 100% sure all rockers were tightened
Ive always ran them all down "to proper GM torque specs lol" and then spun the engine 1 turn and checked for "proper torque" again
Ive always ran them all down "to proper GM torque specs lol" and then spun the engine 1 turn and checked for "proper torque" again
06-12-2019, 02:50 PM
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so i removed 1 side last night and they're all tight but i think some should be loose.when u did yours did you find tdc on 1 and then tighten some exhaust and some intake than spin 360* and tighten the rest or did u just torque them all at 1nce
06-12-2019, 04:01 PM
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Are you sure the new rockers you bought are GM? Lots of re-pops floating around on Fleabay that aren’t GM, and could be dimensionally different.
06-12-2019, 05:07 PM
#7
ive done that....... seriously probably 50 times and never had any issue except one time I got in a hurry and left 1 rocker loose.... but that was my fualt
Dont mistake the lifter compressing as them being tight, make sure there all the way down
And as stated are you using GM parts?
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06-12-2019, 05:18 PM
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i bought these rockers from michigan motorsports and they're supposed to b direct replacements.
what exactly do you mean by bottom out and did you torque to 22lbs.thanks for the info.
what exactly do you mean by bottom out and did you torque to 22lbs.thanks for the info.
06-12-2019, 09:05 PM
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06-13-2019, 02:21 PM
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1 side is off but i didnt find any loose 1s but my son is coming over and he'll turn the engine over and we'll see whats loose,or should i loosen them all and retighten them or just tighten them to 22lbs as they are now..
thanks
thanks
06-14-2019, 12:01 PM
#19
Just let it idle for five minutes, sounds to me that a lifter got bled out when you were rotating the motor and needs to pump back up. When I did my clutch it clattered for several minutes because I had to rotate the motor to tighten the clutch/flywheel.
06-14-2019, 12:06 PM
#20
I’ve never had that happen...... maybe a few seconds but not minutes
if that was the case then anytime you shut then engine off and a valve was in the open position (witch is always the case) then that lifter/s would bleed down and clatter ever single startup for several minutes
if that was the case then anytime you shut then engine off and a valve was in the open position (witch is always the case) then that lifter/s would bleed down and clatter ever single startup for several minutes