Fiero Valve Lash Adjustment Procedure For 2.8, 3.1, and 3.4
60 Degree V6
This procedure is valid if you have had to remove the heads or disturb the valve adjustment in any way. If you are only replacing the lower intake gaskets, go to the Members Only Tool Shed and borrow the pushrod removal tool or purchase one at your auto parts store that carries Lisle Tools.
http://www.lislecorp.com/divisions/products/?product=298With your fingers on the rocker arms of #1 cylinder, rotate engine clockwise until the crankshaft damper mark lines up with the 0 mark. If there is no movement in the rocker arms as the timing mark approaches 0 then you are on # 1. If they move, you are on # 4. Anytime you pass the TDC mark, it’s best to continue rotating clockwise until you come back to TDC of the cylinder sequence you’re working with. Timing component wear can give a false setting when you back up to the timing mark.
To set the proper lash on each cylinder, loosen all the rocker arm adjusting nuts.
As you follow the adjusting sequence below, rotate the pushrod while tightening the rocker arm nut until the moment you feel resistance in the pushrod.
Tighten the pushrod nut 1 ½ rotations after you feel the first resistance.
If you start with # 1 cylinder at TDC, the sequence for adjusting are as follows:
Intake Valves 1, 5, and 6.
Exhaust Valves 1, 2, and 3.
Now, rotate the crankshaft in a clockwise direction 360 degrees until the crankshaft pulley timing mark comes to the 0 mark again. This will be cylinder # 4 TDC.
Sequence for adjusting are as follows:
Intake Valves 2, 3, and 4.
Exhaust Valves 4, 5, and 6.
If you started with # 4 TDC sequence, adjust then rotate 360 degrees and adjust at # 1 TDC.
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