HUGE coolant leak - Dodge Cummins Diesel Forum
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post #1 of 22 (permalink) Old 06-16-2010, 10:13 AM Thread Starter
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HUGE coolant leak

One day out of the blue I notice my truck is leaking coolant. It is coming from the lower coolant neck/junction on the passenger side of the block. I then proceeded to do the thing anyone would... buy a new gasket and replace the old one. To my surprise the truck leaked worse. I then tear it all the way down again this time being very careful to clean , sand mating surfaces, make sure its dry, and adding some gasket sealer/maker. I waited 2 days to make sure the gasket sealer would be nice and cured. Sure I had fixed the issue this time I fill it back up with coolant and start it up only to realize that it is now pouring coolant out of the same place...

WTF!! am I missing something.. is there a common issue i dont know about.. Anyone have this issue before? Any suggestions would be great..


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post #2 of 22 (permalink) Old 06-16-2010, 05:55 PM
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im confused on where your referring to it leaking? is it the lower radiator hose ? or the radiator is cracked itself ?

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post #3 of 22 (permalink) Old 06-17-2010, 12:35 AM
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not sure I know where exactly you mean either, but could the coolant be coming out of the weep hole on the water pump and dripping off the part you mentioned?

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post #4 of 22 (permalink) Old 06-17-2010, 09:37 AM Thread Starter
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Its the neck/junction at the bottom below the alt... the tensioner is attached to it.. the same bracket is also used to attach air conditioning to.

its not the weep hole.. the coolant is literally pouring out.. makes no since to me.. the coolant is def come from behind the bracket for the tensoner and AC..


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post #5 of 22 (permalink) Old 06-17-2010, 12:15 PM
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stabler have the lower rad hose housing cleaned well and depending on the material its made of check it for a crack.

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post #6 of 22 (permalink) Old 06-17-2010, 12:27 PM Thread Starter
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Quote:
Originally Posted by mrmoparwl View Post
stabler have the lower rad hose housing cleaned well and depending on the material its made of check it for a crack.
I did that... sanded the mateing surfaces, cleaned it, and put gasket sealer on it..

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post #7 of 22 (permalink) Old 06-18-2010, 06:56 PM
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one of my trucks would leak there when cold but stop when it warmed up. took it apart and found the rubber seal that looked like a pice cut off a rubber hose. went to dodge with it ( i do not find my local dealer overly usefull) and they ordered what they thought it was. what came in want right so i cleaned everything and put gasket sealant on the old one and put it back together. it did the same thing for a week and then quit leaking. made no sence to me but i sold the motor before i took it apart again.

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post #8 of 22 (permalink) Old 06-20-2010, 08:20 PM Thread Starter
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Samething... it actually pours out of there now.

But only I have the correct rubber gasket and it still pours out of there..

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post #9 of 22 (permalink) Old 06-22-2010, 02:35 PM Thread Starter
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Anyone have any other ideas/suggestions?

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post #10 of 22 (permalink) Old 06-22-2010, 05:53 PM
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oil cooler gasket? its really close by?
ive been watching this thread awhile, im stumped
ch

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post #11 of 22 (permalink) Old 06-22-2010, 07:31 PM
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I think I had the same problem a couple weeks ago. Just cut out the metal pipe + rubber hose and replaced the whole thing with a rubber hose and that fixed it.

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post #12 of 22 (permalink) Old 06-23-2010, 09:51 AM Thread Starter
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no, Its the gasket between the AC bracket and the block..

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