Re: Some general cooling system questions.

Posted by HH56 On 2022/8/16 9:14:27

Fish'n Jim makes a very good point and I may have misunderstood what portion of the trans cooler you were actually wanting to test.

If it is the internal oil cooler plate assy you are testing by applying pressure to a line fitting then my previous comments hold. If it is the outer coolant housing or the entire enclosure you want to test then the standard radiator cap was 7psi with 13psi as an option. If the car had AC or the heavy duty cooling fan option then 13# became the standard. 13# caps are not as common today so 15# is more often what you find in stores and are being used by many.

I have not heard of many entire enclosures failing. The usual issue is the hose connections rust out and become very thin or full of holes under the hoses or coolant runs out at the end of hoses and collects where the tubes are fastened to the enclosures. Corrosion sets in and that joint area becomes a fail point. There are many coolers now in use where the radiator hose tubing has been replaced or repaired by welding or brazing on a short length of exhaust tubing.