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Discussion Starter · #1 ·
I just got a 93 318i and whenever I turn the AC on, the engine revs to almost 2500 rpm. I just bought this car for 1000 off a guy and I know it is going to have issues....just trying to figure them all out.
Plus if anyone can help, it is running hot. When the car is on there is no circulation in either hose coming from the radiator. Thermostat or water pump???
 

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Sway,

Not sure about the AC RPM issue.

As for the car running hot, since there's no circulation, my first guess would be the water pump, check it. If it's the culprit, make sure to buy one with the metal impellers, not the plastic ones.

While you're at it, give the whole cooling system a detailed look, particularly the thermostat, hoses, expansion tank... etc.

Good luck
 

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Most cars have a vacuum line that opens up when you turn your AC on to raise idle. Inspect the vacuum circuit to make sure no lines are cracked or removed.
 

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Discussion Starter · #4 ·
Thank you :). Got the over heating problem fixed....it was a stuck thermostat....now I have an even bigger problem, posted under "please help!!" :)
 
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