2005 Cayenne base model with porous Engine

[antwp]

I have both a 2005 cayenne S and base model the S has 95 k miles and my base has 30 k miles after a round trip to and from vail co I has a coolant leak under the engine. I took it to the deal and after 3 weeks was told I had a porous engine which needed to be replaced at a cost of $13 k. Has anyone seen this before or know what options I have?

[wvicary]

Is the leak from the engine block or cylinder head? I have never seen a porous block on the V6 engine..... time for a second opinion.

[deilenberger]

Certain GM engines (Corvette for instance) had similar problems. GM's fix was cellulose pellets in the coolant. Most NAPA parts stores even know what you need if you say it's to seal up a Corvette cooling system. The cellulose just circulates with the coolant in the absence of air. When it sees air (as when it's passing through the porous casting) it becomes hard and wood like again. That seals the leak. Cost is about $4.. and since you have nothing to lose, it's certainly worth the gamble. And for the people worried about it plugging up the radiator or coolant passages - reread how it works. That just doesn't happen.