I just replaced my entire cooling system, new water pump, radiator, thermostat, fan and fan clutch, hoses and put new belts on it, but it still runs hot when i drive it. It cools down when it idles. I checked the oil for water and it was fine and made sure my belts were tight. Anyone have any suggestions on what it could be?
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Mine was just acting a fool the other day....somehow got an air lock somewhere so i ran it with the heat on, and kept playing with having the cap on/off and adding fluid till it stopped accepting any more. Haven't had a problem in over a month now.
So I guess my question is did you have the heater on wheb you burped?
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Bleed your system again with the heater on Max. Take out the tstat and drill a small hole on top to facilitate air removal.- Josh
1990 325is
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drilling the hole won't matter either way. it can help with releasing trapped air but won't affect the operating temp of the car. put the car on a slight incline about 20 degrees. run the motor with the heat on full. top up the coolant, get the car hot -crack the bleeder open and as mentioned get the revs up to 2k or so. you will see steam and some gurgling coming out. Run it till you see a stream of coolant coming out. close the bleeder and watch the temp gauge. Then take it for a spin if it is still doing it - repeat the process until temp stabilizes.
question: by chance are you running the a/c while driving? if you aux fan isn't working the temp will increase with the extra load on the engine. that's if you have or use a/c. often the aux fan resistor packs it in and although the a/c works your engine temp will rise.sigpic
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Originally posted by stamar View Postbleed it from the overflow hose near the radiator cap. dont drill a new hole unless you have a new screw to put in it, what you just did was creat another leak.
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