Ok, here's the scoop: (cliffs at bottom)
The car runs at 185* while cruising around town.
Once I get to, say, a parking lot and look for a place to park, the temps will climb up to about 210* or 220*.
Once I'm at a dead stop the temps will start creeping back down.
If I'm staying at idle and I rev the engine up I can see (instantly) the temp drop a couple degrees.
Here's the thing that stumps me: If I'm take off from a stop the temps will shoot up 4-5 degrees and then come back down once I'm cruising around...but if I'm going a steady speed and get on it the temps usually drop a degree until I come back to a cruise where they rise back up to 185*.
My high-speed is turning on and I do have pressure on the upper radiator hose. I did a coolant system pressure test and it held the pressure.
There's only two things I could think it would be. Either my waterpump is on it's way out....and the reason it cools when I rev it is because the blades are pumping more water through.
orrrr, I have a bad headgasket and combustion gasses are getting into the coolant when I'm taking off and since I have a fluidyne it can handle (somewhat) the extra heat. There's no signs of a blown headgasket though. The engine doesn't have a miss and there's no oil in coolant or vice-versa. I'm gonna do a compression test once I get the time.
I'm gonna try and hook it up to a sniffer, too
Any ideas....I'm stumped.
Cliff: getting warm on take-off. Pressure in upper hose. both fan speeds are working when they should. cools down if I rev it at an idle. No signs of blown headgasket (will do comp. test later on)
The car runs at 185* while cruising around town.
Once I get to, say, a parking lot and look for a place to park, the temps will climb up to about 210* or 220*.
Once I'm at a dead stop the temps will start creeping back down.
If I'm staying at idle and I rev the engine up I can see (instantly) the temp drop a couple degrees.
Here's the thing that stumps me: If I'm take off from a stop the temps will shoot up 4-5 degrees and then come back down once I'm cruising around...but if I'm going a steady speed and get on it the temps usually drop a degree until I come back to a cruise where they rise back up to 185*.
My high-speed is turning on and I do have pressure on the upper radiator hose. I did a coolant system pressure test and it held the pressure.
There's only two things I could think it would be. Either my waterpump is on it's way out....and the reason it cools when I rev it is because the blades are pumping more water through.
orrrr, I have a bad headgasket and combustion gasses are getting into the coolant when I'm taking off and since I have a fluidyne it can handle (somewhat) the extra heat. There's no signs of a blown headgasket though. The engine doesn't have a miss and there's no oil in coolant or vice-versa. I'm gonna do a compression test once I get the time.
I'm gonna try and hook it up to a sniffer, too
Any ideas....I'm stumped.
Cliff: getting warm on take-off. Pressure in upper hose. both fan speeds are working when they should. cools down if I rev it at an idle. No signs of blown headgasket (will do comp. test later on)