Niku-Sama

not on a 300zx but on a VG motor i was wondering if i should have ANY play when i try to move the rocker arms from side to side

i was trying to figure out if theres a main or rod bearing out and no matter what i did it still made the noise even with going through the cylinders one at a time un plugging the plugs. so i popped the front valve cover off and3 of the 6 in there move side to side a bit.

snwbrderphat540

any rocker arm wil move side to side if they arent adjusted right (however i dont know if the VG SOHC motor is hydraulice lifter or not) so you could check the specs on them make sure they are tight enough but if they hdraulic then they get self adjusted to the proper pressure when the engine is running in which case i have no idea how to tell if thats a bad thing or normal.

Niku-Sama

cant rember to be honest

KasbeKZ

i think the lifters are non hydraulic. i'm pretty sure that that motion isn't bad enough to be the cause of whatever problem you have. i think they are meant to be self centering pretty much. i know that on my midget those beatchis would move a good bit. that engine is a tank lol.

snwbrderphat540

go get a haynes of FSM or similare and look it up doofus

xenonxiii

all VG motors have hydraulic lifters. there should be little to none side play in the rockers as they are on a shaft.

you can get the FSM with the specs from my site below.

motowndowntown

seems to me that if you had a main or rod bearing going your oil pressure would be low. If I remember right a bad rod bearing will knock all the time and a main will rattle on acceleration.

Niku-Sama

nope, got pressure