I'm in the process of rebuilding the heat exchanger and replacing all coolant pipes in my yanmar 2gm20f. The shop manual shows a pressure tester the replaces the radiator cap on the heat exchanger so you can pump up the pressure to 15 psi and look for leaks or see if raw water is being forced out of the heat exchanger by a leak. Was going to mount a Schrader valve through the old radiator cap and use a bike pump. Any thoughts!? Can I buy or rent a real pressure tester?
Thanks
Dan
Thanks
Dan