Quote:
Originally Posted by ahadi
Hi Guys,
I have same issue with my heat exchanger, it leaks between those 2 O-ring. Do I need to flush the coolant system in order to replace the O-rings?
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there is really no flush required. just "drain". yes, you must drain coolant before pulling the heat exchanger off.
it's recommended to drain and refill coolant every 4 years anyways. don't forget the drain plug on engine block.