Thread: turbo blow out
View Single Post
RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
RarlyL8's Avatar
Join Date: Jan 2000
Location: Huntsville, AL
Posts: 14,082
I did not see listed which turbo sump tank you are using. The stock vented tank will allow excess oil to dump into the air filter housing where in an un-vented tank oil may back up and blow through the turbo seals.
The balance of flow should be measured; the volume of oil pumping into the turbo vs the volume being pumped out of the sump tank.
Just having a ball bearing in the oil feed line is not a thorough indicator. These bearings distort and wear over time becoming oblong and allowing more flow.
A not uncommon issue resulting in blown turbo seals is occlusion of the oil passages. I have a couple pictures of glops of red silicone sealant that squeezed out from between the oil gaskets and made it's way into the oil passage. No sealants should be used on these gaskets.
RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 02-16-2011, 06:48 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #9 (permalink)