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Boiling over - not overheating

 
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Old 06 Jan 2010, 02:23 pm
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Default Boiling over - not overheating

I recently purchased a 2001 PT Cruiser Limited Edition.

After about 1 week I notice that it intermittenly boils over into the coolant recover reservoir after I shut off the engine. It never overheats. The temp guage comes up to temp in a normal amount of time and stays there. I can hear the coolant perculating in the reservoir and if I start is and start driving it will go away.

I replaced the cap yesterday and I am not sure this will fix it. I have never noticed the fan running. Would this cause this symptom. Is there an easy way to test the fan/ relays?

thanks
ionheavens
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Old 06 Jan 2010, 04:24 pm
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Default Re: Boiling over - not overheating

Welcome.
Open hood, start engine, turn on A/C - engine fan should come on.
When engine is cooled off, is there coolant in the overflow bottle?
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Old 06 Jan 2010, 06:58 pm
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Default Re: Boiling over - not overheating

It always draws the coolant back in the radiator.

The fan does not come on with the AC

thanks
ionheavens
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Old 06 Jan 2010, 07:19 pm
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Default Re: Boiling over - not overheating

Quote:
Originally Posted by ionheavens View Post
It always draws the coolant back in the radiator.

The fan does not come on with the AC

thanks
ionheavens
Time to replace the radiator fan. That should take care of the problem.
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Old 06 Jan 2010, 08:35 pm
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Default Re: Boiling over - not overheating

Thanks for the a/c tip to prove the fan should come on. That was useful.

There seems to be 5 components to the radiator fan circuit. 2 relays, a fuse, a fan and the engine control module (which triggers the relays)

Outside of using a meter or test light are there any more tricks to isolating the component. I would hate to replace the fan when it was still good.

thanks
-art-
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Old 06 Jan 2010, 08:59 pm
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Default Re: Boiling over - not overheating

Easy thing to do is to move relays around. replace the fan relay with one of the other ones. if fan comes on buy new relay. simple.
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Old 07 Jan 2010, 08:20 am
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Default Re: Boiling over - not overheating

Thanks!
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Old 07 Jan 2010, 08:37 pm
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Default Re: Boiling over - not overheating

Quote:
Originally Posted by Hooligan View Post
Time to replace the radiator fan. That should take care of the problem.
I would bet a steak dinner at a restaurant of my choice that the fan is the problem. But please log back in and let us know when you get it diagnosed and fixed. And welcome.
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Old 08 Jan 2010, 09:28 am
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Default Re: Boiling over - not overheating

Thanks! I will let you know as soon as I find out.

New problem that will delay the fix for a few days...I drove to a site about 20 miles into the country and when I got back in the car, my key would not turn in the ignition. I am going out today to try to remove the ignition lock and replace it.
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Old 13 Jan 2010, 11:34 am
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Default Re: Boiling over - not overheating

I ended up going back out and hotwiring the car. I took it to a locksmith. He inserted the key, tapped on it a few times with the handle of a screwdriver and it opened. He then rebuilt it for $30. I then reassembled the steering column and we are back to normal.

I removed the two radiator fan relays and tested them on the bench, both are ok. Both sockets had the 12 volts necessary to turn the fan on.
For grins I connect the two contacts inside the relay socket that turn the fan on, and the fan did not turn on.

I ordered a fan last week. Hopefully it will arrive soon.

Thanks for the help thus far.
ionheavens
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