Pressure Testing

Check breather hose connected between radiator and expansion tank. Fit new hose if hose is cracked. Using a T-piece, connect pressure tester to thin hose connected between radiator and expansion tank. Increase pressure and check opening pressure of expansion tank cap, and for leaks. Opening pressure is 65-85 kPa (9.2-12.0 psi). Check that pressure does not drop noticeably for 3 minutes.