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Old 27 Aug 2016, 02:43 pm
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Angry Boiling coolant

So I drove home from work and when I got the stop sign by my house I heard a sound like boiling water and the temp gauge was about 3/4 of the way to the red line
so I pulled into the house turned the car off and popped the hood and the coolant overflow was shaking
called my dad he said it could be the thermostat or the head gasket
did a compression check and everything runs around 155 psi
however there was oil by the first cylinder when I pulled the spark plug out

any ideas guys??
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Old 27 Aug 2016, 02:52 pm
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Default Re: Boiling coolant

Welcome to the forum
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Old 27 Aug 2016, 02:58 pm
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Default Re: Boiling coolant

Welcome to the forum from Ventura, Southern California

What year is your PT Cruiser?

How many miles on the engine?

Is your radiator fan working?
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Old 27 Aug 2016, 03:17 pm
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Default Re: Boiling coolant

Welcome to the forum.

There are several reasons for the coolant to reach the boiling point but the most common, as was already asked, is that the radiator fan isn't working properly. Trapped air in the system can also cause this, usually from loosing coolant which is replaced by air.

If the temperature gauge goes back to normal (half way) when driving on the highway but starts to raise towards the red line when slowing down or stopped, that almost a sure sign of a bad radiator fan.
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Old 27 Aug 2016, 04:45 pm
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Default Re: Boiling coolant

so throw the plugs back in put the manifold back on and give it a drive?
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Old 27 Aug 2016, 04:50 pm
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Default Re: Boiling coolant

Quote:
Originally Posted by Taylor25 View Post
so throw the plugs back in put the manifold back on and give it a drive?
That is not the advise that was suggested.

I would re-read ptcruisersteve and CREWZINs response to you again.
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Old 27 Aug 2016, 05:22 pm
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Default Re: Boiling coolant

At this point I would suggest manually checking the radiator fan to make sure the low speed and the high speed are working before doing anything else.

What year is your PT Cruiser?

How many miles on the engine?
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Old 27 Aug 2016, 05:24 pm
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Default Re: Boiling coolant

02 pt cruiser
180k
one front end wreck
however it was working properly until yesterday
only other thing wrong is it needs a wheel bearing
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Old 27 Aug 2016, 06:01 pm
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Default Re: Boiling coolant

Just apply 12 volts from the battery to the low speed and high speed on the radiator fan after you unplug it and let us know what you find out.
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Old 27 Aug 2016, 07:24 pm
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Default Re: Boiling coolant

I had that happen with mine. A new thermostat, radiator cap and line to the overflow jug, took care of it. The cap was actually the real culprit. It wasn't holding enough pressure.
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