Does anyone know why I keep blowing turbo seals. Brand new turbo and after an hour of driving, a mix of cruising and boost runs it starts billowing smoke out the exhaust. Get home pull the turbo off and compressor and turbine both full of oil. Running the restricted banjo bolt that came with it into the oil feed and a big drain pipe. Do I need an even smaller restrictor ?

ide be more focused on the drain line, is it big enough/not kinked/ can easily drain via gravity to the sump

Check your drain line and make sure the motor has the capability to breathe. A pair of breathers off the rocker cover to a catch can/then atmosphere helps. Nice and big, AN-8 or AN-10. What is the turbo?

+1 for drain line after I rebuilt my t3 everything looked ok cold but as it heated up the return line kinked and it was my oil return kinking not my turbo,

thanks for the suggestions. will double check my drain line but it seemed fine and easily large enough to flow enough oil. will try check it whilst hot at some point too. if you have your breathers setup, 1 into PCV valve and one blocked off, could that pressurise the crank case and allow excess pressure to be fed to the oil supply line, causing the seals to blow ?

Quote: Originally Posted by ZOO222 [View Post] thanks for the suggestions. will double check my drain line but it seemed fine and easily large enough to flow enough oil. will try check it whilst hot at some point too. if you have your breathers setup, 1 into PCV valve and one blocked off, could that pressurise the crank case and allow excess pressure to be fed to the oil supply line, causing the seals to blow ? Definitely could be! Does your dipstick blow out under boost? One factory little breather is not a big space to vent any boost that creeps its' way into the crankcase, and even less so through the restrictive PCV valve.

Yes! Excessive crankcase pressure will cause the exhaust seal in the turbo to sh1t itself...I had this happen on an SR20 I had rebuilt years ago...it had excessive piston to bore clearance after the rebuild and was breathing like a steam train causing the crankcase to pressurise and the turbo exhaust seal to sh1t... Turbo rebuilder kept telling me the motor had excessive blow-by...and he was right. Unblock that blocked breather! Better yet, remove and block the PCV then run both breathers to a catch can, sorted.

dip stick has never blown out. will get onto chucking the PCV valve in the bin and setting up a catch can. hard to find something thats doesnt look cheap and disguting as