I noticed that the coolant level in my radiator rises and falls very rhythmically. It seems to be very consistent in it's tidal movements and appears to coincide with a fluctuating temp gauge. This problem (?) first appeared when I had the heater hose fitting on the intake manifold replaced due to corrosion (damn thing fell off!). I tried bleeding any air out of the cooling system and replaced the thermostat, but it didn't help. That's when I noticed the radiator tidal action. The truck (95 K1500 5.7L auto with trans cooler) doesn't overheat. I've never had a vehicle with a constantly moving temp gauge. It goes up and down between 1/4 (guessing 160deg.) and 1/2 (210). When first warmed up, it spikes at something slightly over 210 and then drops down and up and down and..... With the summer heat soon upon us and increased towing (boat), I'm afraid it may overheat or worse. Otherwise, the truck seems to run fine. Thoughts? TIA TomC
- posted
16 years ago