Pressure test coolant system

wrldky

Well-known member
Apr 21, 2004
412
7
Raleigh, NC
These seems like a basic question but when you are doing a pressure test. How do you plug the overflow tube so the air/coolant doesn't escape from there?
 

WaltNYC

Well-known member
Mar 3, 2010
714
142
NYC
Most work by removing the cap from the coolant reservoir and attaching the air pump where the cap would be. Kits generally come with various cap sizes to accommodate multiple vehicles.

Once attached, pressurize the system to 15lbs and wait for leaks to reveal themselves.