fbodyman1026

iTrader: (11)

My friends 2000 z28 has noticed a faint tick coming from the drivers side head. His car only has 31k on it and it stock besides an slp lid. I figured it might be his oil that was sitting over winter(old 10w-30 conventional). So we ran some seafoam through it and put in some GC 0w-30. The tick is still there and accelerates with the rpms. Also oil pressure has dropped with the GC and kn oil filter. It was 40 idle/ 60 cruising. Now its like 35 and shaky/ 60 WOT??? When I changed I gained like 10psi everywhere.

Please give some advice on what to check first. Were thinking either roller rockers or lifters. But I thought lifter ticks went away when the car warmed up.

Thanks.

4.6what

i had a tick like that the other day. but not long after i heard the tick it started missing. then my car decided to play hide the pushrod. i found it later in 2 pieces.