Bought a used Pontiac from a an ad, installed new manifold gaskets because of water in the oil. I also installed a radiator, new thermostat, new sensor, new pig tail...Gauge says engine is running hot, temp would go all the way up then down, then up and stop. I connected my ODB code reader, ODB reads same temp and fluctuates with dash gauge. I have had to add water since replacing the radiator, (2 gallons lost during road tests), bled the system till the bleeder looked like it was pissing, coolant has escaped from a new radiator cap twice during this (seems like a lot of pressure), overflow tank has a little excitement going on also, all cylinders reading 40 psi off minimum spec. Heat gun at thermostat housing reads 208, lower hose at engine reads 180....ODB and gauge read 250-253.
Dec 17, 2015 at 6:13 PM
