75 series 1hz problem

[cambo-84]

hey everyone,

I have a 75 series 1hz with mtq turbo setup. On start up it blows a puff of blue/grey smoke and when it is running it blows very fumy exhaust that smells of burning oil with no visible smoke while normal driving. engine has done 240 000 kms. Had compression test done pre turbo, 100% all cylinders.

changed the oil and added oil stabiliser with no change.

turbo is about 2 years old and done about 50 000kms. has visible oil leaks around oil lines at turbo.

there is no noticeable effect of performance.

anyone have any ideas as to what the problem is?

cheers

[Z()LTAN]

sounds like inner turbo seals.

Take the crossover pipe off the engine (the pipe from the turbo to the intake manifold) there will be a little oil in there, if there is loads of oil that's your problem

[cambo-84]

thanks mate

i had a look and i would say the seals have gone in the turbo. there is oil everywhere in there.

2 years old, 60 000kms, no towing, 10 psi

Turbo didn't last very long for what it has done.
fairly average performance i rekon

[AustImages]

thanks mate

i had a look and i would say the seals have gone in the turbo. there is oil everywhere in there.

2 years old, 60 000kms, no towing, 10 psi

Turbo didn't last very long for what it has done.
fairly average performance i rekon

Might be more serious than that.

My MTQ-turbo 1Hz 100-series had 6 cracked pistons and the only visible sign (before one piston completely let go giving me an $7k repair bill) was oil around the turbo inlet and outlet pipes. The oil was coming through the crankcase vent tube and through the turbo. Never blew any serious smoke. If there is oil in the inlet pipe (between air cleaner and turbo) then you can bet it's not a turbo seal, it's coming from the crankcase vent.

Take the crankcase vent tube off and see how fumey it is. If there's lots of fumes and there is oil in the vent tube then I'd suspect that you have cracked piston(s), pressurising the crankcase. I'd hot-foot it down to a tech and get your compression tested. It could mean $'000 difference in repair bills if you rebuild before a piston lets go and damages the bore. That said, there are a few places selling rebuilt exchange 1Hzs now for about $4k. But, I'm not sure if they use genuine parts or not.

[Barno111]

mate before you go into turbo problems, have you engine checked over properly by a good desiel mechanic. the problem my not be in you turbo. i also have a 1hz but with a dts turbo running 12 psi. i thought the turbo seals may have gone but in fact it was the positive crackcase breath. which was plumbed back in before my turbo on the inlet side. this has caused oil to leek out around the joins in the plumbing and a black/blue smoke to puff out when started. this is nothing to worry about, becuase it is the only way you can have it plumbed with out it being illegal. so have your motor checked first, because you will be up for big bucks if the turbo needs resealing, unless it comes under warrenty.

good luck

[Z()LTAN]

austimages.... didnt he say he already had a compression check done and it was all 100%?

Barno, the PCV valve will introduce some oil into the intake but it wont be super oily.

If cambo rekons there is alot of oil in there, its only realy one thing more it could be.

[cambo-84]

thanks for the input everyone.

Had the compression test done pre turbo and it was 100%. there is no oil in the air intake before the turbo, only after the turbo. There is only oil seeping through the plumbing join after the turbo, from the air cleaner to the turbo is oil free. I will check everything else but the source of the oil seems to be from the turbo.

I will confirm thats the problem but i don't think it will still be under warrenty

[me3@neuralfibre.com]

Some oil is normal, it'll even pool in the cracks / joints.

The pipe walls should be sticky, but not wet.

Your PCV will dump some oil mist in too. Excess there is from ring blowby.

Could be turbo, but they tend to go for a lot longer than that.

Paul

[cambo-84]

Thanks mate but judging by the amount of oil thats coming out of there it couldn't be normal, it is literaly everywhere on that side of the motor and in the intake.

Is there much chance of doing engine damage and how much time on average would i have before something craps it's self.

Also would i be better off rebuilding this one or tracking down a replacement like one from a 79. whats a rebuild worth $$$.

cheers.

[me3@neuralfibre.com]

Thanks mate but judging by the amount of oil thats coming out of there it couldn't be normal, it is literaly everywhere on that side of the motor and in the intake.

Is there much chance of doing engine damage and how much time on average would i have before something craps it's self.

Also would i be better off rebuilding this one or tracking down a replacement like one from a 79. whats a rebuild worth $$$.

cheers.

It won't damage the engine (unless you run out of oil)
Long term will be smoky and carbon stuff up due to burning oil.

Turbo's are tough little critters.

Rebuilds are generally $500-$1000 depending.

Check the crain pipe is clear, this can cause oil to bypass the seals.

Paul