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Coolant connector tube leak

 
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  #1 (permalink)  
Old 21 Nov 2012, 07:40 am
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Default Coolant connector tube leak

Hi all,
Looking for some advice. I have been having cooling problems with my non-turbo PT for some time now. I recently replaced my thermostat and in the process broke my coolant connector tube. I replaced it at that time. I recently replaced the radiator, hoses, and cap. My car was still running a little hotter than normal (half way up gauge). I realized my cooling fan is only working when AC on. So I noticed fluid under car and found it was coming from coolant connector tube. I tried to tighten bolts but its down solidly. So finally my questions... Should there be a gasket here or is that the purpose of the thermostat rubber ring? Could the extra heat (minimal) be responsible? Any suggestions?

Travis
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Old 21 Nov 2012, 07:58 am
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Default Re: Coolant connector tube leak

There should have been a grove in the bottom for a o ring. Should have come with the part. T stat ring is to prevent water from bypassing t stat.

Get a new fan.
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Old 21 Nov 2012, 04:00 pm
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Default Re: Coolant connector tube leak

What's a coolant connector tube? You mean the plastic thermostat housing that the cap screws onto?
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Old 22 Nov 2012, 09:27 am
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Default Re: Coolant connector tube leak

Yes that is what I am referring to. I think I figured out the problem. When I replaced the thermostat a few months back the thermstat o-ring that came with it was regular thickness thermostat ring with a notch that doesn't extend below the edge of the coolant connector tube. The replacement part from napa is at least 1.5 times thicker and mates with the lower body before tightening. Presumably my cooling system problems have always stemmed from a bad fan and my then a leaking gasket. Based on this it doesn't seem like there is a separate gasket from the thermostat oring?
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Old 22 Nov 2012, 10:12 am
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Default Re: Coolant connector tube leak

Maybe down load the service or repair manuals and see how it is shown. They should be in the tech section in the doc library.
I really like pictures on stuff like this.
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Old 22 Nov 2012, 11:24 am
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Default Re: Coolant connector tube leak

Look closly at the rubber ring for the thermostat. It should have a square profile with a slit on the inside face. The outer edge of the Tstat goes into the slit so that half the rubber ring is above and half below and an equal amount around the outside. This seals both the coolant flow from leaking past the thermostat but also leaks from the housing. The ring does not act like an O-ring sealing only one surface.
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Old 22 Nov 2012, 11:39 am
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Default Re: Coolant connector tube leak

Maybe these will help:



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Old 22 Nov 2012, 12:44 pm
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Default Re: Coolant connector tube leak

Quote:
Originally Posted by Busted_PT View Post
There should have been a grove in the bottom for a o ring. Should have come with the part. T stat ring is to prevent water from bypassing t stat.

Get a new fan.
My mistake on the o ring.
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__________________________________________________ __________________________________________________ ___________Performance, Body and Service, OEM

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Old 22 Nov 2012, 08:28 pm
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Default Re: Coolant connector tube leak

Wow those pictures are great. The diagrams from mopar online were not nearly as helpful. I think I finally got the right thermostat o-ring (third pull of supposedly compatible parts was much thicker and had the notch. Reminds me to be cautios with aftermarket parts.

Again I know the cooling fan lost its high speed so I got a new one which I'll switch out tomorrow. Do you think a small leak like that would effect the overall pressure enough to prevent the system from cooling?

Thanks again for all the replays, especially on thanks giving.

Happy Turkey Day

Travis
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Old 22 Nov 2012, 08:36 pm
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Default Re: Coolant connector tube leak

Any leak lets air in to replace the coolant that's lost. Air in, lowers the boiling point and can cause overheating.
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