The turbo should hold boost on the compressor side when you pressurize it.
The seals that block off the center section might need servicing. Or you clocked the turbo and didn't tighten it down evenly and the air is escaping.
- Are you SURE its leaking, and it's not just spinning the shaft and you hear air moving from the hotside of the turbo?
By no means a trusted source, but you can read this if it helps:
Quote:
SEALS
The main purpose of the seals at both the compressor and turbine ends of the center housing is to prevent the high-pressure gasses from entering the center housing and then to the crankcase! The fact that that the seals prevent oil from entering the housings is secondary.
|
https://www.ebay.com/gds/TURBOCHARGE...8320282/g.html