TURBO CAMRY 3vzFE ON ROAD LITTLE PROBLEMS PLEASE HELP!!!

[khanhstar]

hey guys khanhstar here,
my cars been on the road with the turbo strapped on for quite awhile now.
smalls problems have occured eg. head gasket(s) blown [[has to refer to custom mad Ti Hgs made for trucks and since i was there changed all gaskets and seals with inner cast iron rings found form your local truck service stores!
ok after that was Hosing.. bad hosing brand new hosing bursting and all kinds of shit. so i called up hose and reel and got those customed aswell costing me about 450 all up. so far so good. ok now the big issue after everything was fixed i noticed my boost gauge reading 20Hg at brake idle which is good upon it use to be at 10. NOWW since its showing its running properly and the compression it good when i hit boost (about 10psi) oil leaks out of the engine oil cap??? when i hit 14 psi it spits out!! Question. could it be just the oil caps getting old and needs a replacement? or am i in alot of trouble????/
cheers

[paintedtrain]

sounds like your crank case is getting pressurized. next thing to go will be your valve cover gaskets.

[73sport]

Two things - A) you've routed the PCV wrong and your turbo (after the compressor) is going straighht to the crankcase. B) You engine is worn out the added boost 10psi coupled with an old worn out engine, well the ignition gasses created during combustion are blowing right past your piston rings. Once past the rings, they pressurize the crankcase and make it leak everywhere.

What's the engines compression on all holes?

Also, if you boost comes on too early at low RPM's it will make this worse. Does it still have any knock sensors onboard and working? You better check cause its a recipe for dissaster if its detonating.

You have any pictures of this you care to share?

[khanhstar]

Bump!

[Gothmog3VZ]

hey;
slightly unrelated, but did you run your AFM before or after the turbo in the intake?

and I suggest you PM tony about this; he might know, but you are currently the only active turbo-3vz member; I guess some things you gotta learn firsthand?

[lemegacool]

do a compression test to check if the cylinders are not leaking then as 73sport said my guess is that you plugged the crankcase vent after the compressor and therefore you're getting the whole bottom end pressurized...

[khanhstar]

well thanks for the responses guys but my gaskets and valve covers are fine also all the hoses are brand new and top notch no blockages nothing...
all i can think of now is the oilcap and i find an aftermarket one that handles higher compression.???? IDEAS!!!! and btw after its fixed im planning on going NOS =D got all my hoses and lines ready just need to stealth install it hehe =D

[khanhstar]

oh and btw 73sport my compression is at 150 per cylinder and my boost kicks in round 4000rpm. so idk whats going on

[Chris Crash]

150 is kinda low... what were the exact numbers for each cylinder?

[khanhstar]

there wasnt much difference in all 6 about +-2? i thought 150 was high as cake!!

[Chris Crash]

I'm pretty sure it's supposed to be around 172 PSI +- 14, but I guess it's good that all 6 are that close to each other.

[khanhstar]

yea it was round there before i got my heads shaved to lower the compression for the turbo but after i did that i lost abit of torque on the bottom end but the top end is nuts. i can 120mph on the highway flat foot n rip up the tyres easy but as i said bottom end is worse just noticeable. cant complain though

[sykou]

i gotta agree with the post about your crankcase pressurizing. I have a turbo'd lancer boosting 10psi and when i had the pcv system hooked up like a NA car it spit oil out the oil cap. PCV system is completely diferent on turbocharged applications. You absolutely do NOT want to pressurize the crankcase as you will cause your valve stem seals and valve cover gasket to fail. I do not know exactly how you have your hosing routed but you should have a pcv valve before any inlet to the crank case/valvecover. The crankcase should not see positive pressure, only vacuum.

[lemegacool]

the spec for 1mzfe is 175 psi, minimum 147 or so... your compression is pretty low...

the problem is not likely that your oil cap is done... it would be nice to have a pic on how you routed the pcv system on your turbo setup.... there is no aftermarket oil cap that can handle more pressure (at least as far as i know ) as the crankcase is not supposed to have any pressure in it (it should be vented by the pcv (positive crankcase ventilation))

and some turbo pr0n would be nice too

[73sport]

You're doing it wrong!

Esp if thinking that oil flying out the breather will be remedied by making the whole bigger. . . sounds like you need a poppet valve on the crankcase!

FWIW: usually the goal is to lower the compression ratio on forced induction engines not raise it. Thats why the MZ's make poor candidates for stuffing! 10.5:1 is pretty high already.

Look through the specs on cars w/induction from the factory, (I could eat my words as I haven't looked) but I bet high 9's is what you get. No need for high CR w/induction as the induction is there to stuff the cylinder anyway.

Assuming you shaved the heads as said and have stock pistons, your MZ should be over 170PSI unless the cam timing is off. It fills the crankcase cause the top rings are prolly busted! Does it have knock sensors on it?