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JimCulp JimCulp is offline
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Join Date: Jan 2006
Posts: 274
Originally Posted by NathanUK View Post
Jimculp had a similair failure on his HFS.
As NathanUK said, I have replaced seals in my K27HFS twice now. This whole thing really comes down to figuring out why the seals are going.

In my case, my EFI tune is toward the rich side of the spectrum. This condition can supposedly produce an "afterburner effect" which heats up the exhaust side of the turbo beyond tolerances and results in the seals heating and failiing. A rich condition can also dilute the viscosity of the oil which would also not help the turbo's efficiency.

The other possible cause could be oil starvation. Be sure that your check valve is operating properly as well as your scavenge pump.
Old 09-09-2008, 10:05 AM
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