[wildwestrider]

I just purchased a 92 968 coupe. I noticed when I first drove it and again today,....that the interior of the car smells like crankcase fumes (Not to be confused with gasoline vapor odors). Interestingly My last 944 (years ago)smelled the same way.



Its strong enough that I notice that after driving the car,....and I get out,....My clothes have that same odor of crankcase fumes. I have also noticed that the windows keep getting a light fog or film on them...........I have cleaned them repeatedly and within hours,.....they are getting hazy again.



My best guess is that there is a compromise somewhere in the crankcase ventilation system that allows crankcase vapors to vent into the engine bay, and that further,......there is a gasket, seal or plug that is torn, worn, or missing somewhere on the firewall,...which in turns allow these vapors/fumes into the passenger compartment......or,....perhaps the vapors are somehow being drawn into the fresh air intake for the A/C.



I have tried switching from the recirculate mode to the "Fresh air" intake mode, and it doesn't seem to make any difference.



Brian



Anyone have any experience with this??



Brian Collins

Austin TX

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[sasilverbullet]

Hmmm, I'm no expert, but I'll give you my thoughts -

(in order of probability)



1. oil leak onto exhaust manifold - probably the valve cover gasket

2. exhaust leak

3. cracked vacum hose

4. equivalent of the PCV valve clogged

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[Greimann]

One important seal is a rubber bulb seal at the rear of the engine compartment. It runs across the top of the firewall and separates the engine compartment from the well where the ventilation system draws air in. If that is gone, you will be sucking engine compartment air into the car.

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