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radiator help please

 
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  #1 (permalink)  
Old 02 Dec 2014, 12:26 pm
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Default radiator help please

Hi everyone this is my first post, Hope someone can help.
I just got my first pt cruiser 2.0 limited edition very nice car but the problem is the radiator is always cold? the top hose gets hot and the heater blows hot air. But the temp gauge sits just above the blue line at the bottom. Can anyone tell me is this normal for a Cruiser.

Thanks in advance
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Old 02 Dec 2014, 12:49 pm
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Default Re: radiator help please

the temp gauge should be at the halfway mark or just a hair below it. if the hose is hot and you're getting heat, I think you can rule out the radiator.

I'm sure someone will chime in with more knowledge regarding your dilemma.

and, welcome to the forums.
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Old 02 Dec 2014, 01:17 pm
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Default Re: radiator help please

Welcome.
Your temp sensor is likely bad, because if it were accurate, you would not get heat, and hose would not be hot.
When car is cold, open cap, and be sure coolant is right up to brim of radiator, and that overflow tank has coolant in it as well, because other possibility for a false temp reading is that there could be air in the system.
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Old 02 Dec 2014, 01:29 pm
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Default Re: radiator help please

Thanks for the info, The gauge was sitting in the middle when I got the car last week ten it went up to the red so I toped it up, Now I'm having the problem with the gauge. Should the radiator be cold after a run in the car.
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Old 02 Dec 2014, 01:32 pm
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Default Re: radiator help please

Confused me for minute. You didn't mean that the radiator was cold but the temp gage says it's cold right. agree with above in that case. The sensor. This could also affect fuel mileage. Is what computer uses as one of the fuel air mixture determiners.
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Old 02 Dec 2014, 01:39 pm
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Default Re: radiator help please

Quote:
Originally Posted by Rick1 View Post
Thanks for the info, The gauge was sitting in the middle when I got the car last week ten it went up to the red so I toped it up, Now I'm having the problem with the gauge. Should the radiator be cold after a run in the car.
Have you felt the radiator? I bet you have air in your cooling system, since it overheated (which is vital information you didn't mention at first).
Resolve this issue quickly or you will cause costly damage to your engine.
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nurtured by the false notion that democracy means that 'my ignorance is just as good as your knowledge."
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'05 Limited Turbo Lite, (Silver, of course)4-wheel ABS, Sunroof, Spoiler. Mods: E&G Classic grill, K&N FIPK, BTG duals, rear lowered 1.5", LED washer lights, $20 catch can, Aoogah horn, Weatherflectors, Sunroof Deflector, Fuzzy Dice, rear logo flames, rear pinstripe graphic, Gen3 Taillights, rear sway bar, hood struts, Strut bar.
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Old 02 Dec 2014, 03:19 pm
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Default Re: radiator help please

Do you know how to burp the coolant system?
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Old 02 Dec 2014, 03:20 pm
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Default Re: radiator help please

Update
Sorry for the confusion will try again, I got the car last week and everything was ok. After 4 days the temp gauge went from the middle up to the red when sitting at lights or in traffic, but went down again as I was driving the heater was also going hat and cold. When I got home I toped up and thought that's it, Now the radiator is cold to touch but the top hose is hot and the heater is hot, But the gauge is only going to just above the blue line. After a 30 min drive the radiator is still cold to touch.
I just been on the phone to the person I got it from and he told me it had a new radiator put in it but cant remember when ( strange ) but as this is my first pt I'm lost.

Thanks again
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Old 02 Dec 2014, 03:24 pm
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Default Re: radiator help please

Sorry don't know how to burp it. I will have a look on this site for a guide on how to do it.
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Old 02 Dec 2014, 03:54 pm
KA9VQF's Avatar
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Default Re: radiator help please

Just under the radiator fill housing is a air bleeder screw. You need a 3/8” wrench to turn it. Once you get the car warmed up you unscrew the bleeder and let the air out.

The air will more than likely have some very hot steam in it so I like to put an old piece of clear plastic hose over the end when I do this.

The hose is long enough that it will reach clear to the ground under the car. I have been known to put a empty pop bottle on the end of the hose to catch any coolent that might come out.

I like to use a clear hose so I can see when the coolant starts coming out in a full stream. Having it come out in a full stream indicates that you have probably gotten all the air out of the system. {on edit} you will have to add more water or antifreeze to the system until you get a full stream.

Once the coolant comes out in a full stream close the bleeder screw again.

Personally I think I would stick in a new thermostat while your messing around. Something caused your car to over heat in the first place. There is a chance that the thermostat is the culprit. It has either stuck closed at one time and is maybe now stuck open or at least partially open which would cause your engine to not maintain steady heat.
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Last edited by KA9VQF; 02 Dec 2014 at 10:33 pm. Reason: to add detail
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