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Heating & Cooling 2nd Gen Dodge Ram Heating & Cooling Problems and Questions.


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  #11  
Old 06-24-2014, 09:26 PM
HansCavu HansCavu is offline
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Hello to all the above hard working mechanics. Maybe because of my age I was hoping for a smaller project. You guys really get into it! Maybe you can help me keep this simple and to the point. I want it fixed right but don't want to rebuild the whole front.

My truck is leaking coolant. Can't see where it is coming from. My first thought was water pump. When cold , no leak, radiator not too low. Check level and add just a little, drips. Start engine, it starts pissing, fan throws it everywhere. Turn off, piss continues. Not a spray, more like a stream. Not long after piss stops. I check level and only need to add a little. At some point close to full the drip starts again then stops after a short while.
It seems to me that if the leak was high, what I described is what would happen. If it was my water pump I would have to add a lot more coolant. Is there a crossover hose somewhere under the air conditioner pump? Does my logic seem true?
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Old 06-24-2014, 10:47 PM
HansCavu HansCavu is offline
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Ok! So I gunked the engine and pressure washed to see if I could track the leak.
Now there is no dripping when I top off the radiator. when the engine is running there is no coolant coming out anywhere. I am positive the fluid was green coolant dripping off the front of the crank. Has anyone experienced an intermittent coolant leak????
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Old 06-24-2014, 11:53 PM
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Hans, once again, I would just recommend pressurizing the cooling system with a radiator pressure tester. Go to the quarter car wash and clean the entire area around the WP and timing cover at the block. The crud from earlier seepage will impair a clear view of the leak. The leak wont happen until the radiator pressure is at running temp, so just starting it won't tell you anything. The big spot it starts is on the passenger side, but you cant see it due to the engine accessories in the way. Keep looking, and we'll be here to help.
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Old 06-25-2014, 02:56 PM
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^^ I agree ^^

Pressure test is the way to go.

If there is some loose scale in the cooling system and one of the upper cores in the radiator is leaking something bay have blocked it. Also if the water pump is leaking from the weep-hole in the bottom it can happen intermittently.

I think the best bet is to clean and pressure test it.

Second, make sure the expansion tank isn't overfilled.
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  #15  
Old 06-25-2014, 05:55 PM
HansCavu HansCavu is offline
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Ok, I pressure checked it and it is not holding pressure. The view of the bottom of the water pump is obscured by the Harmonic Balancer. That is where the coolant is dripping from the rear corner. No evidence of coolant above that. I used my telescoping mirror to look around. Without actually seeing the hole on the water pump it seems that area is where the leak is. Looks like I'll have to tear into it to know for sure.
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Old 06-26-2014, 12:12 PM
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Thank you Laz & War,
Hope the abbreviations are ok.
Progress report: engine stripped down to pump
area now sanitary
small bypass hose bulging
guess I'll replace pump and hoses at this point
no obvious leakage evidence
wondering about timing cover, sealants, etc.
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  #17  
Old 06-27-2014, 09:28 AM
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Depending on your mileage, you may want to consider replacing the timing chain at this point.
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  #18  
Old 06-27-2014, 08:17 PM
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I was going to suggest using a cell phone video to slowly move around under there with the engine off.

They can get into some pretty tight spaces to see what it looks like. My guess is the weep hole in the bottom of the pump. I'd also replace the hose and clamps to save some future aggravation.

How dare you abbreviate LT's SN what r u thinking?
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  #19  
Old 06-28-2014, 12:13 AM
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Loving what Warlock said! Lets make sure your timing-chain cover isn't leaking at the block! Pleeeese check that area carefully. We have fixes for that too.
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