Closed Cooling System Pressure Test

 

I was loosing some coolant from both engines during the season . . . a few ounces of coolant during each outing.  So, during the off season, I decided to do a cooling system pressure check.  I re-purposed a leak tester for the task and ran about 10 psi into the system.


There were a couple sources of leaks on each engine, which presented themselves as bubbles when I used a soapy water spray on the fitting and joint areas of the system

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