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Unread 02-14-2012, 10:15 AM   #1
macastro
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Join Date: Feb 2012
Location: Toronto, on
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2001 Grand Cherokee No heat, can it be water pump?

I have a 2001 Jeep GC with 280,000 kms; there seems to be a leak, small, at the front of the engine between the rad and the engine.

There is a noise that I am being told it's the water pump and there is no heat in the cabin.

I was told, the heat issue can be caused by the blend door but my car doesn't have dual AC/HEAT; it's the Laredo version.

Need help!.

Thanks.

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Unread 02-14-2012, 09:50 PM   #2
smuggler
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Fix the leak first, bleed the air out, then check and see if you still don't have heat. One thing at a time.
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Unread 02-14-2012, 10:05 PM   #3
USFORCES
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Small leak is probably the water pump going out, unless you have a leak some where else and no heat could be worn out pump blades.
Have you took the cap off when it's cold to see how it's flowing when it starts to warm up?
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Unread 02-15-2012, 06:49 AM   #4
specia1k
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When you change the Water Pump, go ahead and change the Thermostat. And while going thru this, might as well drain the coolant and replace. Also do a search on "Heating core" which possibly is blocked. There are many threads on this subject. If you reverse flush the heater core and possibly use CLR to clean the heater core, then put everything back together, you will take care of your leak and probably your heating issue.
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Unread 02-15-2012, 07:19 AM   #5
tripplec
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With the engine full heated up the two heater hoses should be HOT with the fan on LOW. After turning the fan to HIGH the output hose should be much cooler.

If both hoses were hot then and you were not getting heat is highly likely the core is plugged and fluid is bypassing so to speak. When heat is extracted the output hose is of course cooler.

Blast water from a hose both ways through the core until it flows easily both ways. You might want to cover the engine with some plastic or such to keey the ignition and other electic connection from getting wet.

This is the simplest 1st step.
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Unread 03-02-2012, 02:46 PM   #6
macastro
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Replaced the water pump and thermostat, all good, noises gone, leaks gone and now we have heat!! am glad I didn't take the glove box to look for the blend doors, all works fine.
Thanks!!!
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