Help Finding Engine Problem

[RUSTY_01]

hey guys, ive got a 94 r33 rb25DET and need some help with problems, was driving the other days running sweet, then started spluttereing and shit load of smoke blew out the exhaust, oil pressure dropped right off, so i stopped let it sit, restarted.. oil pressure fine again, but had a splutter kinda runs like vw motor there is no knock tho.. ive stripped the intercooler pipe work to check the turbo, oil on pipe and sitting at the mouth of the turbo, pulled out the plugs the find the front plug badly fouled, other plugs were fine, can anyone please help shed some light on what trouble im up for?

ALSO

wondering what the allowable shaft play is on the stock turbo, i seem to have a excessive amount of play in the turbo now but is there a measurement or how much is to much???

Edited April 4, 2008 by RUSTY_01

[VB-]

only guessing here but sounds as though maybe your PCV was stuck shut, then built up pressure and it finally let go, through your turbo seal, and possibly blew the PCV to the shithouse. where is your PCV plumbed to?

[RUSTY_01]

pvc valve is all as per factory, from inlet manifold to rocker cover,, ill check over that tomorrow when i get time after work, also going to give it a compression test, and a new set of plugs to see where that gets me,

[Adriano]

Sounds to me like a cracked piston, i would do a comp test

[RUSTY_01]

thanks guys wil be doing a compression test tomorrow arvo, will also check for a stuck pcv valve, will post up the outcome,

[RUSTY_01]

did a comp test, cyl 1- 55psi, 2 -60psi the rest 130 psi, spoken to a few people they seem to think its the head gasket, will do another compression test with oil in cyl tomorrow to see if its the piston rings??

[tacker]

cracked ring lands i would guess, just did it myself to # 5 piston

[RUSTY_01]

thought maybe that, but due to the even drop on 2 cylinders , thought it made sense to be the head gasket blown between cylinders and through a oil port( hence the smoke and not using water),,