New to me 2003 Honda Insight that was missing the serpentine belt and clutch was all loose. The big bearing was in pieces so I installed a new clutch and coil assembly made for Civics. Diameter is a little less but that shouldn't be a problem in normal driving. Anyway, the air blows ice cold but after a minute, low side is way too high. Ambient around 80°, engine about 1200 rpm, both fans on. Any idea why it might be so high?