Turbo rebuild (picture heavy!)

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Re: Turbo rebuild (picture heavy!)

Postby Simon_P » Sun 05.03.2017, 16:00

The shaft is just a good fit in the cast iron housing so there shouldn't be any opportunity for oil to come out of it. Moreover it is a bit hot.

Even though the shaft is at the bottom of the casting it isn't the lowest point. To get enough oil in the right place for it to come out of the shaft there would most likely be clouds of smoke and it'd be rather more obvious what the problem is.

can you post a picture?

Are the plugs oily?

is the gasket looking material cast iron coloured, ie same as the head gasket?
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Re: Turbo rebuild (picture heavy!)

Postby HJ2 » Sun 05.03.2017, 17:07

Hahaha! I know there's no oil supposed to be there and I think it can only come from the turbo shaft :oops:
But the gasket material... Yes, it looks like the same material as the head gasket and the oil return pipe for all that matter...
Also... no smoke!
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Re: Turbo rebuild (picture heavy!)

Postby HJ2 » Mon 06.03.2017, 13:27

:oops:
Sleep deprivation strikes hard again!

Now that I have rested some more and looked twice, it turns out it IS the oil return pipe leaking :oops:
Easier to fix than another turbo overhaul. ;-)
As long as the pipe is not suddenly pressurized somehow! :shock:

I'll keep you posted! :bonk:
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Re: Turbo rebuild (picture heavy!)

Postby HJ2 » Mon 26.06.2017, 08:19

A little bit late, but to complete this:
The flange on the oil return pipe looked warped and I flattened it.
Then there was still a leak, so i replaced the (paper) gasket. It yet leaked again :shock:
Then i noticed that the flange on the turbo was not flat! Googled it and it turned out to be a common thing.
I replaced the paper seal with a 0.3mm silicon rubber seal, where i made the bore in the seal larger to compensate for the effect of squashing the soft rubber. (checked on the bench with a torqued test-mount before mounting it to the turbo.
No leaks anymore :clap:
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