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Mystery coolant leak -help needed

Posted By: Whitey Nocar

Mystery coolant leak -help needed - 04/15/23 01:50 PM

I have a 2017 Megacab 6.4. Drove it a couple weeks ago, 2 days ago I got home from work and noticed a puddle under it. Has coolant dripping from several locations. Front and passenger side of oil pan near gasket, along the bottom of the steering stabilizer, where the motor and trans meet- just at the bottom, dripping off a wire harness next to oil pan.
Put my inspection camera in every nook and cranny I could get it to and no signs of the cause. Another weird thing is my oil level is high. I have always changed oil on time if not sooner and always used 7 quarts of pennzoil 0-40 ultra platinum, and it has never been overfilled. Oil is darker than normal too. Not sure if that might be because since it hasn’t been my daily driver for a year and a half and oil isn’t changed as frequently, or coolant is getting in the oil, which I’m guessing would have something to do with a head gasket?
Thoughts on this?
Oh and it has 110,000 miles
Posted By: larrymopar360

Re: Mystery coolant leak -help needed - 04/15/23 04:06 PM

Strange because head gasket would normally produce milky substance on dipstick and not darker oil, and exhaust smoke. I'd check my PCV system too although this wouldn't normally produce a leak.

I'd look up top first. So many leaks start at the top and run down and sometimes searching at the top of the engine is forgotten.
Posted By: moparjim79

Re: Mystery coolant leak -help needed - 04/15/23 05:10 PM

Top off your coolant and report back. I'm curious how much has been lost. Your truck probably has some tow/HD coolers added as well(like an oil cooler)...
Posted By: Jambbii

Re: Mystery coolant leak -help needed - 04/16/23 03:22 PM

I'd check out the EGR cooler. It's under the intake manifold and has some coolant lines running to it. From my research (I was looking to possibly delete it) it seems that these can leak an be a pain to spot.
Posted By: Twostick

Re: Mystery coolant leak -help needed - 04/17/23 02:50 AM

Originally Posted by Jambbii
I'd check out the EGR cooler. It's under the intake manifold and has some coolant lines running to it. From my research (I was looking to possibly delete it) it seems that these can leak an be a pain to spot.


Gas engine with an EGR cooler?

Kevin
Posted By: 1969ronnie

Re: Mystery coolant leak -help needed - 04/18/23 12:53 PM

wave Agree , It sounds like the EGR Cooler under the Intake Manifold or hoses / Tubes feeding it are leaking Part # 4227647AF . Yes , EGR Cooler on a Gas Engine . drive Ronnie edit fat fingers Part # 4627647AF
Posted By: Whitey Nocar

Re: Mystery coolant leak -help needed - 04/19/23 12:28 AM

Thanks for the advise everyone. I looked again and the thing is still dripping. The main drips coming from the crank pulley area, which made me think possible water pump issue, but looks dry around water pump… at least the parts I can see.

I think this is going to the dealership, and I’m gonna see if they honor the Lifetime warranty I paid for. I expect they will if it’s a water pump or get cooler.

I will report back
Posted By: larrymopar360

Re: Mystery coolant leak -help needed - 04/19/23 03:20 PM

Originally Posted by Whitey Nocar
Thanks for the advise everyone. I looked again and the thing is still dripping. The main drips coming from the crank pulley area, which made me think possible water pump issue, but looks dry around water pump… at least the parts I can see.

I think this is going to the dealership, and I’m gonna see if they honor the Lifetime warranty I paid for. I expect they will if it’s a water pump or get cooler.

I will report back
It can be really difficult to see the weep hole area. See if there's any wobble to the water pump pulley. A lot of time there be a wobble to the pulley about the time they start leaking.
Posted By: Whitey Nocar

Re: Mystery coolant leak -help needed - 05/06/23 06:10 PM

It was the water pump. MaxCare warranty covered it. Apparently the coolant line to the egr was also frozen to the water pump so they replaced that I’m told, as well as a lower radiator hose.
Thanks for the input everyone.
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