over heating randomly.

[Kevin1989]

okay a week and a half ago the car started overheating when i was getting off the highway.... so dawson helped me out did a T stat cause it was going up and down figured that was probably it. drove 45 mins on the highway somewhere, stayed cool and awesome it was fine. drive back 45 mins fine. as im getting off the highway it starts to get hot again? at this point im like WTF.

dawsons ran a pressure test and found a small leak in the waterpump gasket/front cover. as a last ditch effort i put some stop leak pellets in to stop the dripp that had started to occur. THis was thursday before the cruise. car is fine doesnt get hot at all drove to the cruise did my thang it was gravy.


Drive to lebanon tonight and all is good. Here where it gets wierd. Im always looking at the temp gauge now so i park at B dubs. look at the temp before i turn the key off it was the second notch from the bottom on a fox temp gauge. Go in my buddy eats and i go to leave 15-20 mins later gett in the car turn it on and litterally 30 seconds after i start it the heater starts blowing cold air and the temp shoots from where it was to a notch above halfway... Having allum. heads i shut it off and waited 30 seconds turn the key to see the gauge move. i crank it the temp is now dropped almost to the middle in 30 seconds. i fire it up pull out on the road and TaDAAA it drops to around 180!?!?!?!? drive home its fine, its a little above the second notch on the temp when i put it in the garage. i pop the hood to try to see if its leaking again. nothing. i release the pressure from the radiator and the coolant in the resivoir(SP) is boilng. or kind of boiling. the coolant light isnt on so im not thinking it leaked, i have no idea im puzzled

[Mista Bone]

air pockets????

[Kevin1989]

thats what dawson was saying. but how lol

[loyd]

How long was the heads or motor together before this started to happen?

[Gearhead]

as a last ditch effort i put some stop leak pellets in to stop the dripp that had started to occur.

that crap will clog your radiator and cause it to overheat

[Johnny O]

air pockets????

I agree.. My camry did that to me and it was because of air.

[sean]

If it is air will he hear it through his heater core? The bubbling? I also don't think I even have to mention that the factory temp Gage on a fox isn't worth even looking at.

[mustangboy]

Try jacking up the left side of the car, remove the radiator cap and let the car run till it gets good and hot. If it has an air pocket that will help it to burp out.

[Kevin1989]

so i drove a quater mile out of my neighborhood shut it off for 10 mins start it back up leave get to the top of my neighborhood and the temp gauge is almost spiked. i shut it off costed in to the drive way, shut it off pop the hood and its not even really hot under the hood. so i take the cap off and have it idle for about 15 the whole time the gauge stays up i felt the valve covers and i could lay my hand on them, i let it iddle with the cap off the raidior then kinda burped when it sucked the coolant in then filled back up and i shut it off, what is going on with this thing

[stang5slow]

keep doing that, let it run till its normal temp, with the cap off, squeeze the upper radiator hose some, put coolant in, keep re peating till no more air pockets come out, i had to do that to mine when i did the water pump and t-stat first time, it fixed the temp fluxuating guage

[cobra429boss]

Welcome back to owning a mustang.. Always working on them

[Mista Bone]

Car Ramps also help or parking on a hill.