Hey guys I have the 1995 chevy cavalier Z24 with the 2.3 liter DOHC,which is notorious for high oil pressure making the lifters hold the valves open while it bucks and kicks till it settles down. Is it easier just to put in a new oil pump or try to fix the old one,meaning taking out the old spring and honeing the hole to prevent future sticking.Also can you just put in a different size spring?
Before you go through all that, add a half a can of SeaFoam engine tune-up to the oil. The relief valve spring might be stuck with gum and varnish. The SeaFoam might disolve this gum and varnish and free up the spring.
Thanks Tester, I will give seafoam a try. If this does not work could honeing out the hole a little or a different spring work ?