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Restore_84 Restore_84 is offline
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Join Date: Jan 2020
Location: Tampa
Posts: 325
Heat exchanger causing intermix?

Purchased 1999 996 with oil in the coolant / intermix issue and lots of white smoke out the exhaust. I RR AOS along with several coolant flushes and a couple of oil changes. No more white smoke and the car runs great. But I’m still seeing Mayo in the coolant. I Flushed a few more times. Then drained the oil without refilling it again I left the car over a few days with water in the coolant lines and no oil in the engine. Removed the oil plug and water came out of the engine.

Can the culprit be the heat exchanger? Or are cracks in the heads causing water to seap through?

Reason I’m refusing to accept cracked heads is how well the car runs and drives after replacing the AOS....
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Old 04-02-2021, 04:02 AM
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