Question about 2005 GMC Sierra
5.3L vortec engine
Posted by Anonymous on
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Posted on Jan 02, 2017
The 4.3L engines may be equipped with either of 2 rocker arm retaining systems. If your engine utilizes screw-in type rocker arm studs with positive stop shoulders, no valve lash adjustment is necessary or possible. If however, you engine utilizes the pressed-in rocker arm studs, use the following procedure to tighten the rocker arm nuts and properly center the pushrod on the hydraulic lifter:
Another method to tell when the piston is coming up on the compression stroke is by removing the spark plug and placing your thumb over the hole, you will feel the air being forced out of the spark plug hole. Stop turning the crankshaft when the TDC timing mark on the crankshaft pulley is directly aligned with the timing mark pointer or the zero mark on the scale.
The valve arrangement is as follows:
E-I-I-E-I-E (right bank-front-to-rear) E-I-E-I-I-E (left bank-front-to-rear)
Posted on Sep 23, 2010
SOURCE: i need the torque specs
THERE IS NO TORQUE SPEC FOR HYDROLIQUE LIFTERS
YOU ADJUST VALVES PER SPECIFICATION USUALLY
TIGHTEN UNTIL NO FREEPLAY BETWEEN LIFTER AND PUSHROD
THEN 1/2 OR 3/4 TURN MORE SO HYDROLIQUE LIFTER CAN PUMP
OIL UP THE PUSHROD TO LUBRICATE TOP END
LOOK UP SPEC TO BE SHURE OF FINAL TURN
Posted on Apr 16, 2011
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