Cayenne Turbo 2004 Oil in the coolant

[manbat]

Has anyone else had this problem which seems unfixable? we first noticed oil in the coolant when the coolant warning light came on. The car went into a reputable Prosche specialist who replaced the head gaskets and heat exchanger. The heads were pressure tested and were fine. The car seemed fine for about 3 months (5000km) and then the coolant warning light came on again - Same situation - Oil in the coolant.

The car went back to the same specialist, they pressure tested the heads, heat exchanger and turbos and could find no fault. They then wanted to simply replace the turbos as a bit of trial and error (Very expensive exercise). At this point I took the car back from them.

I'm thinking it's a cracked block unless anyone can suggest any other possibilities.

[Loren]

As your topic appears to be a DIY question (rather than a DIY Tutorial), we have moved it to the appropriate forum.

This is an automatically generated reply.

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[wvicary]

It's very difficult to fully remove all the old oil from the cooling system so are you sure it's not just residue from the first failure? How much coolant are you loosing? Is there a lot of oil in the coolant?

[JFP in PA]

WVicary is correct, it is an absolute bear to clean oil out of the cooling system. We have had to run water and a cleaning compound in the system multiple times, followed by multiple changes of clear water before it was clean. Not expensive, but very time consuming.............