Installing rocker arms
03-02-2014, 01:37 PM
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Car: '86 Trans Am
Engine: 305 TPI
Installing rocker arms
I did my first valve job and replaced the cylinder head gaskets and now I'm re-assembling the engine back together.
Is there something that I should know about installing rocker arms + pushrods? I was about to simply bolt the rocker arms back in place but then I remember something about rotating the engine until the 1st cylinder is in its TDD or something like that.
My setup is a stock '86 305 TPI machine.
The engine has been rotated a few times but the camshaft and timing chain are untouched.
Is there something that I should know about installing rocker arms + pushrods? I was about to simply bolt the rocker arms back in place but then I remember something about rotating the engine until the 1st cylinder is in its TDD or something like that.
My setup is a stock '86 305 TPI machine.
The engine has been rotated a few times but the camshaft and timing chain are untouched.
03-02-2014, 03:11 PM
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: Installing rocker arms
When the lifter is on the base circle of the cam, you tighten the rocker down to zero lash. You then tighten the rocker an additional 1-4 to 1/2 turn. That sets a preload inside the hydraulic lifter.
03-02-2014, 07:35 PM
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Re: Installing rocker arms
Maybe it was Alky who previously mentioned making the nut tighter again if it feels loose by tapping it some with a hammer (off the stud of course!) to close up the top end a bit. Was a saver for me. Don't hit it too hard though - too tight and it's won't back off the stud and you've created another problem...
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