Engine Coolant Leak Check

WARNING: This page is about a different car, the 2004 Mitsubishi Eclipse. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: When pressure testing the cooling system, slowly release cooling system pressure to avoid getting burned by hot coolant.

CAUTION:

Be sure to completely clean away any moisture from the places checked.
When the tester is taken out, be careful not to spill any coolant from it.
Be careful when installing and removing the tester and when testing not to deform the filler neck of the radiator.

Fig 1: Checking Leakage From Radiator Hose

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Check that the coolant level is up to the filler neck. Install a radiator cap tester and apply 160 kPa (23 psi) pressure, and then check for leakage from the radiator hose or connections.
If there is leakage, repair or replace the appropriate part.