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Old 11-14-2014, 01:28 AM   #6
Bru
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When I had a cracked head 2 years ago the symptoms were a puff of white smoke on start up that would go away. As it got worse I had overheating problems. There are several tests for exhaust gasses in the coolant from cracked heads or gaskets. Check out youtube for this subject. I would still check or change the thermostat. If it does not open the engine will overheat.
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