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Turbo Question - Rebuilt Turbo Leaking Oil?

QRI05E

By QRI05E,
in Engines & Forced Induction

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QRI05E Mentor

QRI05E

Posted
Posted

Hey Guys,

About 6 months ago I purchased a fully rebuilt T25G for a turbo conversion from Lavish Performance (who I cant get in touch with anymore :) ) Ever since i have bought it, i have kept it wrapped in a plastic bag (sitting upright on the exhaust housing studs) in my room away from all dust and moisture... Yesterday i took it out and noticed clean/clear oil on the rear impeller wheel and few drips of oil...

Q. Is this normal? Could this be due to the bearings been lubricated when rebuilt?

Regards,

Sarkis

discopotato03 Grand Master

discopotato03

Posted
Posted

You always lubricate a turbochargers bearings (in the center section) when assembling it - means there's some lube at start up and helps prevent corrosion if it sits around for a while .

Most turbochargers have literally a piston ring on the turbine shafts hub just inboard of the turbine wheel itself . If you stand a turbocharger on its turbine end oil can weep through the small gap in the piston ring and run around the back of the turbine wheel and drip out the outlet . It's just gravity doing it's job .

If you had the turbo horizontal it would probably do the same thing out the oil drain hole in the bearing housing . When rebuilt turbos usually have plastic caps fitted to the oil inlet and drain holes to keep dirt and dust out .

Provided the people who rebuilt it did the job properly you should not have any issues , I'd probably put a couple of drips of clean engine oil down the oil inlet (emphasize just a couple of drops) just before start up just so it has a little before oil pressure is up .

If really paranoid you can start it up with the oil drain pipe or hose removed from underneath and observe oil running out of the drain hole temporarily - have a drain pan or tin handy to prevent spills .

Getting a little OT , often its price neutral to buy new cartridge (center housing and wheels) with bush bearing turbos . That way you get all the important bits brand new

Cheers A .

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