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Have any of you guys done pressure testing on your coolant system. I used a bicycle pump, a cheap pressure gauge, T- fitting, and tube valve. I then pressurized the system to about 8 psi to check for leaks. Particularly all those damn water plugs and hose clamp areas. Found a few small leaks here and there . Tightened up everything and hopefully no more cooling problems after this. Will post photos of my nifty device.
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You might want to actually test the system at a proper pressure. Generally 10-20% over the cap pressure. Mines 1.4bar or 21 psi. I check it at around 25-30psi. As at any point during running. It could reach at least the cap pressure.