Coolant pouring out of my overflow tank - JeepForum.com

 
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post #1 of 8 Old 12-15-2009, 09:49 PM Thread Starter
jwiowa
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Coolant pouring out of my overflow tank

I just replaced my radiator, waterpump, thermostate couple of hoses due to my fan coming loose and destroying my rad.; and changed the other stuff just because I was working on it and they were cheap. Now I dont have any heat coming out unless I am at 3k rpm and when it is running coolant is coming out of the overflow tank. and when I shut it off more pours out. I have bled the thing about 20 times. I have a "t" installed in my heater inlet hose. I cannnot figure out why or how this is happening. Doesnt overheat. Any ideas??

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post #2 of 8 Old 12-15-2009, 10:14 PM
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Originally Posted by jwiowa View Post
I just replaced my radiator, water pump, thermostat couple of hoses due to my fan coming loose and destroying my rad.; and changed the other stuff just because I was working on it and they were cheap. Now I don't have any heat coming out unless I am at 3k rpm and when it is running coolant is coming out of the overflow tank. and when I shut it off more pours out. I have bled the thing about 20 times. I have a "t" installed in my heater inlet hose. I can not figure out why or how this is happening. Doesn't overheat. Any ideas??
I would re-check the t-stat to make sure its in the correct way. Try running it with it out too.
The "t" in the heater redirects fluid to bypass the heater and should not be the problem.

You did replace the belt correctly

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post #3 of 8 Old 12-15-2009, 10:18 PM Thread Starter
jwiowa
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The thermostat will only go in one way or you cant bolt the housing on. The belt is installed right(after i found the right routing that had my idler below the PS pump and not under the alt) The "t" I was talking about is a insert to burp the system like what you get in a flush fill kit just a custom one that will last longer than 2 days and seals with a gasket(like on a garden hose) If the t stat is not working will this cause this?? Tstat is a 5 min fix in front of the parts store if necessary?
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post #4 of 8 Old 12-15-2009, 10:48 PM
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The thermostat will only go in one way or you cant bolt the housing on. The belt is installed right(after i found the right routing that had my idler below the PS pump and not under the alt) The "t" I was talking about is a insert to burp the system like what you get in a flush fill kit just a custom one that will last longer than 2 days and seals with a gasket(like on a garden hose) If the t stat is not working will this cause this?? Tstat is a 5 min fix in front of the parts store if necessary?
If that is the case then your water pump is not pumping. The heater hose comes directly from the water pump and if you have no fluid pumping.

Diagram not specific
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post #5 of 8 Old 12-15-2009, 11:01 PM Thread Starter
jwiowa
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The heater hose going into the wp is th ereturn line not the inlet(does that matter) and its a brand new wp(should be pumping. ANy way to check that out?
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post #6 of 8 Old 12-16-2009, 05:35 AM
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A quick test to determine if the pump is working is to check if the heater warms properly. A defective water pump will not be able to circulate heated coolant through the long heater hose to the heater core.

Are you sure that you have the right pump? If I remember right, the 4.0 is equipped with a reverse rotating water pump. Someone please correct me if I'm mistaken. Reverse rotation pumps should have the letter "R" somewhere on the pump body.

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post #7 of 8 Old 12-16-2009, 12:16 PM Thread Starter
jwiowa
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I am pretty sure I have the right pump it matches the old on e exactly. The heater works when I get the rpms up to about 3K.
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post #8 of 8 Old 12-19-2009, 10:27 AM
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Try this: remove the hose that goes to the top of the radiator (from the engine), insert a garden hose to the radiator cap (set the flow low enough to insure not to over heat), and then start the engine.

You should be able to see (if you don't have too much water pressure from the garden hose) the water pump moving fluid (increased fluid when you rev the engine).

If not flow increase while rev'ing the engine = water pump is bad.


Second idea. Have you checked to make sure that the fan is pulling enough air to cool the radiator.

And re-check the rotational direction on the pump.
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