525 coolant cap leak
#13
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The top flange on tank is little rough and was a concern that not getting good seal but it did seal good when I used my pressure gauge. Think it would help to double up rubber seals on the cap?
#14
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iTrader: (8)
Well I pressurized heat exchanger alone and did hold 20psi. But I have 40 plus psi water pressure when running hard. I pulled plugs did leak down test on engine no signs of head gasket leaking. I guess I am going to order new heat exchanger and see if it fixes issue. 1k gamble but sick of screwing around with this.
When you originally psi tested your closed cooling system, you connected the correct cap onto your expansion tank and pressureized to 15psi? No leakage or drop in psi? This tells me the problem is not in the closed cooling system.
#15
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No I pressurized system via removing cap and pressurizing the tank. I never thought of rigging up a way to pressurize system with my cap on and seeing if I can get the cap to leak. There is a small hose that runs from tank to top of heat exchanger wondering if I cap one side then pressurize through hose would work?
#16
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iTrader: (8)
No I pressurized system via removing cap and pressurizing the tank. I never thought of rigging up a way to pressurize system with my cap on and seeing if I can get the cap to leak. There is a small hose that runs from tank to top of heat exchanger wondering if I cap one side then pressurize through hose would work?
#17
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I found the problem. The top tank is leaking around surface where cap seals. When I use my tank pressure adapter and regular radiator cap it hold pressure. When I put cap on I can hear it leaking around seal. I am going to run it this way temporarily until I get a new cap. Thank you guys for helping saved me 1k for new heat exchanger!
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