924Board.org

[exd]

I solve almost all problems with my 924 and this is the last one (I hope:) )..

After I turn off the engine, the temperature goes up and sometimes hits the read area. Then few litres of water runs out. It doesn't overheat while I'm driving, just after I stop. The fan is working. With ignition on, on high speed, with ignition off on low speed. But mostly max. 20 seconds after I turn the ignition off, no matter what the temperature is.
Today, when I got home, the temperature was high, fan was working, so I tried to leave the ignition on (with the engine not running), so the fan would run on high speed to cool better the engine. Even off that the teperature was growing up.

Does anyone had similar problem and could help me, please?
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924, 1984, Europe version

[Chrenan]

20 seconds doesn't seem long enough. Have you replaced the fan switch that screws into the radiator?
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1987 951 - M193 Version for Japan

[exd]

no, not yet. What worries me is that the temperature is growing even with the fan running on full speed. I was thinking if the problem isn't anywhere else..
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924, 1984, Europe version

[Chrenan]

Is the air bled from the system? Major air pockets can cause this type of heat soak after shutdown.
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1987 951 - M193 Version for Japan

[exd]

thanks Chrenan, that may be it. I will try to bleed it again..
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924, 1984, Europe version

[datatrain]

Have you checked the radiator pressure cap ? Sounds as though it's not holding the pressure.
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'78 924 NA with Collector plate
33 year old car, with me for 21 yrs
Mint '92 318i BMW
Near mint '98 Buick LeSabre
VE7HFR

[dpw928]

[exd]

stupid question, but how can I tell if the pressure cap is good? tomorrow I will try to bleed it and I will see..
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924, 1984, Europe version

[dpw928]

A lot of auto parts stores have pressure testers. A general test would be to check the rubber seal to make sure it isn't cracked/split etc., then compress the spring to see if it takes about the same pressure as indicated on top of the cap. If it is old and you are unsure, buy a replacement.

Dennis
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81 931 5 sp
78 928 5 sp Silver
78 928 AT Euro Black

[Ozzie]

Bleed, bleed and more bleed.
If you dont have the bleed plug in the rad hose then have the car facing uphill and bleed.
The temp will rise after shutdown but if it that hot that it is boiling change the rad cap if it continues.
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance

[Martijnus]

just for the record...
what's the right way to fill a completely drained coolant system?
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"Rule: Turbo's make torque, and torque makes fun." (C. Bell)

924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
To be turbo'ed in a while.
Killed her at the Nurburgring, Porscheless at the moment

[StienbargerR]

Make sure your fan in blowing the right way. I didnt realize it, but I had my fan wired backwards... it was making the car run hot, especially after I turned it off. My mechanics caught it luckily though!

Ryan
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1978 924 NA
-250lb lowering springs, Euro Pistons

[exd]

I bought new pressure cup, and I hope that it is fixed. I didn't have much time to test it, but it seems ok now (and the old one was pretty bad).

thank you all very much,

Erik
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924, 1984, Europe version