IMS and Clutch - Estimate

[Jake Raby]

Fuel in the oil does mean something.. Fuel intrusion with these engines is a real issue.

Fuel isn't a lubricant, its a solvent...

Fuel intrusion is one of the things that starts the stage 1 IMS bearing failure as the fuel contaminated oil attacks the outer seal of the factory bearing and begins to wash away the permanent lubrication. The seal is rubber, and that rubber doesn't like solvent/ fuel at all.

I have used a device to measure fuel and coolant intrusing in the past in my 2.5 Boxster and found that are 3K miles using the Kauffman curve as a general rule the intrusion was already excessive.

I am more concerned with ending up in a situation where an engine has another failure, but the IMSR is blamed and we have to fight to prove that our work wasn't the root of the problem.. With some failures there isn't enough left of the engine to tell what failed first. I avoid those situations like the plague as well as the people who I sense could be trigger happy to call a lawyer...