[Scarebird]

Time to change the cam. This is the spec for the old cam:

193/199 .502"/.494" 114LSA

nice cam, for a truck.

This is what I stuffed in:

200/207 .551"/.524" 116.5LSA

If I need to change the cam I am not going to run the same truck specs.

The timing gear is integral with the variable valve train (VTEC, yo...). I see no reason to change that. It has this bolt assembly that moves the timing hydraulically. It is actuated by a solenoid in the timing cover. The VVT gear bolt is 14mm-1.5. I found a truck stud the same size (Dorman 610-333) from a 1988-2000 C3500 and welded it to a piece of tubing - make a nice cam install tool. The cam bearings seem tighter than Pontiac cam bearings.




The 2019 and later engines have an improved oil pump with locating pins; evidently earlier units if not installed correctly would result in pressure failure did not have these pins and required guides to relocate the pump.

The lifter activation solenoids are replaced by these little buggers, blocking off the oil ports.