Something else he should do, especially with a used car of questionable "care" origins is to drain, flush and fill the cooling system. If there's a blockage in there, that should take care of it.

A1C Hodges, Christopher Active Duty USAF Sheppard AFB Texas;Westover ARB Chicopee, MA NECEG "Troll" formerly owned 2000 SVT Contour, with all kinds of goodies;)