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01 PT overheating

 
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Old 29 Dec 2009, 12:08 am
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Unhappy 01 PT overheating

Hey folks I need you minds working on this on.. I have a 2001 Cruisser with an overheating problem, while driving on the highway the temp goes up about 1 bar on the gauge when I stop the temp goes back to normal or one bar below the normal line. Now I have changed to t-stat yesterday, but same problem I replaced the rad fan in the summer (July) but this only because it died. This overheating problem is perlexing because the system is not overflowing the catch bottle and there is no leaking or smell of fluid anywhere. I am thinking the temp sensing bulb? or the pump is toasted I reall don't know what to do. Any help would be great. Thanks
Al.
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Old 29 Dec 2009, 07:24 am
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Default Re: 01 PT overheating

How many miles? Have you had timing belt done? Pump is usually done at same time, so, yeah, pump could be getting "tired".
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Old 29 Dec 2009, 09:10 am
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Unhappy Re: 01 PT overheating

The pump was changed about 20,000 KM's ago new timing belt and drive belts total milage is about 203000 kms. Drove to work today no problem getting there, check coolant level before leaving work this morning all ok but got on the hwy and the engine overheated and I lost all the coolant. The temp outside this morning was -16 so why would it even overheat? Also there was no heat in the cabin prior to the overheat condition.
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Old 29 Dec 2009, 09:52 am
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Default Re: 01 PT overheating

Air in the lines?
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Old 29 Dec 2009, 10:34 am
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Default Re: 01 PT overheating

You have the right coolant mix to handle -16?
Is your car garaged overnight?
I'm thinking an ice blockage formed during the day?
Thermostat been replaced?
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Old 29 Dec 2009, 11:37 am
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Default Re: 01 PT overheating

The coolant is mixed right as per Chrysler, Car is parked outside always, engine block and battery heater installed and always on in cold weather. I just ran the engine again and the line to the rad is hot but you can squeze the hose flat. I am thinking air in the system, how do I bleed this? Just to check and see if anything comes out.
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Old 29 Dec 2009, 01:59 pm
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Default Re: 01 PT overheating

On the thermostat housing there is a bleed off valve. On one of the postings that Crewzin makes is a picture.
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Old 29 Dec 2009, 02:38 pm
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Default Re: 01 PT overheating

Quote:
Originally Posted by Hooligan View Post
On the thermostat housing there is a bleed off valve. On one of the postings that Crewzin makes is a picture.
The pic is in this link ---> heat - defrost problems
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Old 29 Dec 2009, 05:51 pm
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Default Re: 01 PT overheating

If you can squeeze the hose flat, that's not good....
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Old 29 Dec 2009, 11:00 pm
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Default Re: 01 PT overheating

Okay so I bleed the system today but the bleeding screw is crossthreaded and I have to tap the hole to get it back in does anyone know how to remove that housing that the bleed screw goes into?
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