Quote:
Originally Posted by reefgeorge
I intend to pressure test my heater core in place to confirm a leak before tearing in to my dash. I have read that we should not test the core at the full pressure cap rating because the core may get damaged. I have read 5-8 pounds max. Any guidance is appreciated.
Thanks,
George
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You can not believe all you read.
Let some of it go in one ear and out the other
Test it at full pressure cap pressure.
Around 17-18 lbs is safe to test.
The heater core is always under full rad pressure or what ever pressure the cooling system is running at.