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Porsche has been giving me the coolant from their stash & it's a 50/50 mix of pink & distilled water. They told me not to dilute it. We tested the oil cooler & it was fine. The service manager thinks it could be a cracked head, but will require a teardown to be sure. I'm going to have another indy shop run a leak down test & see what they can find. Since this is a problem that should be getting worse, not better, my thought is that it will eventually be diagnosed.
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