Help!! Overcooling and minimal heat - Turbo Dodge Forums : Turbo Dodge Forum for Turbo Mopars, Shelbys, Dodge Daytona, Dodge SRT-4, Chrysler PT Cruiser, Omni and more!
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post #1 of 49 Old 02-27-2012, 11:35 AM Thread Starter
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Help!! Overcooling and minimal heat

I have a 1989 plymouth sundance 2.5 turbo. Its not getting up to temp. and i have minimal heat. Im only going off of the gauge and heat output. I flushed the heater core with some CLR and it got some gunk out. Now both lines are hot going into and out of heater as opposed to just 1 before the flush. I also reversed the lines at the heater core. I have twice as much heat now as i did before before flushing. but still now enough. I also installed a new thermostat with a 1/16" hole. and the car has a brand new radiator. I had the same problem with my 1990 dodge omni. New thermostats and it still never got up to temp. I drive 30 miles to work so i know thats plenty to warm it up.

Any help or ideas? does anyone have a diagram of the cooling lines and flow directions for the 2.5 turbo? What else should i be checking.

I've tried napa stats and dealer stats with no change.
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post #2 of 49 Old 02-27-2012, 11:47 AM
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Re: Help!! Overcooling and minimal heat

Is the thermostat staying cold until needed? Is your upper rad hose hot right after startup?
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post #3 of 49 Old 02-27-2012, 11:48 AM
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Re: Help!! Overcooling and minimal heat

You may have air still in the system.Get a cooant fill funnel(made by lisle from the parts store),They are yellow in color and cost about 20 dolars.You run car with funnel on it and can see the air come out,and if you have a bad head gasket you will see bubbles all the time
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post #4 of 49 Old 02-27-2012, 12:19 PM Thread Starter
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Re: Help!! Overcooling and minimal heat

The upper hose gets warm after idling for a couple minutes. and after driving its hot like it should be. or what i think it should be. and the radiator gets nice and hot as well. Im lost on what to do or look for. I will try to burp and purge all air out again. its just weird this is the second car i've had that has done this. I know the stats installed right with a new water outlet so i know waters is not bypassing the stat.
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post #5 of 49 Old 02-27-2012, 12:20 PM Thread Starter
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Re: Help!! Overcooling and minimal heat

Maybe a hose is routed wrong or backward and its pushing against the stat and forcing it open? im just throwing out ideas here.
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post #6 of 49 Old 02-27-2012, 08:14 PM Thread Starter
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Re: Help!! Overcooling and minimal heat

Well i got quite a few big bubbles out of it just warming it up with the radiator cap off and squeezing various hoses. Lets see what happens. Any other thoughts.
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post #7 of 49 Old 02-27-2012, 08:29 PM
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Re: Help!! Overcooling and minimal heat

Is your vent controls working?
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post #8 of 49 Old 02-27-2012, 10:17 PM Thread Starter
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Re: Help!! Overcooling and minimal heat

Whoops double post. Sorry. Forums and phones dont get along.

Last edited by drunkenfly; 02-27-2012 at 11:20 PM. Reason: double post
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post #9 of 49 Old 02-27-2012, 11:19 PM Thread Starter
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Re: Help!! Overcooling and minimal heat

Yes vent controls work. The gauge is kinda jumpy. Could a bad temp sensor cause this. Also do these cars have a sensor and a sender or just a sensor. Another weird thing is there is no pressure in the radiator after driving. The hoses are all hot but no pressure. I can take the cap off and no coolant blows out. Should i replace the cap and sensor?
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post #10 of 49 Old 02-28-2012, 05:21 AM
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Re: Help!! Overcooling and minimal heat

I think u have a small leak ir a blown gasket or craved head eny coolent in the back on the starter heat sheald??

And the male connectors that go from firewall the heater valve brake at the base and leak coolent down the inside of the car ..
and have u removed ac condenser or added eny heat wrap or had a did rad put in other than stock part number rads?

?

Air sounds right but cap comeing off and no splash not cool..
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post #11 of 49 Old 02-28-2012, 05:38 AM
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Re: Help!! Overcooling and minimal heat

All this talk but has actual engine temp been verified???
Backprobe the Coolant Temp Sensor connector, start the engine and allow to warm for 15-20 minutes and read the voltage/temp.

Once you verify engine temp is correct/incorrect we can go from there.

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post #12 of 49 Old 02-28-2012, 06:43 AM
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Re: Help!! Overcooling and minimal heat

Is the fan running all the time or as it should?
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post #13 of 49 Old 02-28-2012, 07:11 AM
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Re: Help!! Overcooling and minimal heat

I asumed he ran normal procedures and was still stumpt ..
but ur correct..
Run diagnose procedures and if u did let us know..

And like sum1 said check if fan stay on or runs to often. Falty temp readings...
Wait he said car would get hot and could take cap off and no splash..


Do u get a splash if u top off the rad right after crank up leave cap off and stop car after 10a min or does it just bouble in the mouth of the spout???

Let us know.
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post #14 of 49 Old 02-28-2012, 07:13 AM Thread Starter
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Re: Help!! Overcooling and minimal heat

I will verify temp tonight or this weekend. Or once it can sit overnight and i can test it in the morning. The morning temp here is about 10 degrees. And the fan is running as usual to me. Turns on and off like it should. Lets just say its not constantly running.
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post #15 of 49 Old 02-28-2012, 07:40 AM
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Re: Help!! Overcooling and minimal heat

Ok just up date it and after u run it get hot and it starts cooling down poke abound 4 the leaks and stuff that may not be their wile hot.

Could pressure check system but poking around is free lol till sh.t breaks lol
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