Have you pulled the fan shroud and looked that the back of the radiator?

 

The leak is not from anywhere near the radiator. The drip to the floor comes from around the oil pan access ports, however that is no indication on where the origination is... but it's certainly somewhere around the engine block

The oil filter/cooler leaks oil, not coolant. The 2 most common coolant leaks are from where the driver side end cap is crimped onto the radiator as Terry asks above and from the housing for the thermostat where the hose goes into the top of the engine.

I thought cooler gets to the oil cooler as well, and in the event of a crack coolant can leak from there... Ruled out leark from thermostat as well.. I've used a dye to try and locate the leak but have not seen anything around those locations.

 

The oil filter/cooler leaks oil, not coolant. The 2 most common coolant leaks are from where the driver side end cap is crimped onto the radiator as Terry asks above and from the housing for the thermostat where the hose goes into the top of the engine.

 

Welcome to the Forum, from Cave Creek AZ.

Yes it is possible to have a leak when cold, and not hot because of expansion. Try pressure testing it when it is cold.

 

80K miles its time for spark plugs anyway, oil cooler is near the end too, I would remove the upper&lower intake and take a look. You can also use one of those small usb cameras aka boroscope without removing the intake.

 

Ok thanks for the input all.. I think I'll move forward with the replacement of the cooler assembly (and the plugs while it's open), and hopefully it resolves it. Will come back and update.

 

Ok, folks... coming back to close the loop on this one. I believe I've resolved the issue... Sure enough the valley below the filter assembly was a flooded with coolant (see pic). Cleaning everything up and put in the new assembly and things appear to be ok so far. One of the screws holding the assembly to the block refused to tighten (one in the rear), and I was like whatever... hopefully the other 4 would do the job.

Not a tough job, but just takes time with minimal specialized tools. Oh, and I replaced the plugs while at it as well...

 

I thought I'd piggy back on this thread rather than start a new one since I have a similar issue and suspect the oil cooler is leaking coolant. Have a 2013 JKU. Losing a small amount of coolant and get a faint sweet smell of evaporating anti-freeze when around the engine bay or even walking by it after driving. So far I have not found visual evidence of a leak in another location. No drips or puddling that I've been able to find. Looking down into gap by the oil filter housing with a flashlight reveals what looks like some liquid down on top of the block. So, I'm really suspicious of the oil cooler housing leaking the coolant but one never knows until you get deep into that area buried in no-man's land of the engine (replaced oil pressure switch about a year ago). A few questions for those that have done this repair:

1. I replaced the gaskets for the lower and upper intake manifolds about 10 months ago when I replaced the oil pressure switch that's in this exact area. About 2,500 miles driven since then (it's not driven much these days). Do I need to replace the lower and upper intake gaskets again when I make this repair, or are the ones I put in there 10 months ago likely fine?

2. Should I drain all the coolant, or just enough to get the level below the height of the oil cooler to avoid any coolant leaking out into this area when removed?

3. Drain and replace the engine oil after the oil cooler has been replaced?

EDIT: Also, looking for a good source/price for the oil cooler part (Mopar #5184294AE).

Thanks in advance for you insights.

 

I thought I'd piggy back on this thread rather than start a new one since I have a similar issue and suspect the oil cooler is leaking coolant. Have a 2013 JKU. Losing a small amount of coolant and get a faint sweet smell of evaporating anti-freeze when around the engine bay or even walking by it after driving. So far I have not found visual evidence of a leak in another location. No drips or puddling that I've been able to find. Looking down into gap by the oil filter housing with a flashlight reveals what looks like some liquid down on top of the block. So, I'm really suspicious of the oil cooler housing leaking the coolant but one never knows until you get deep into that area buried in no-man's land of the engine (replaced oil pressure switch about a year ago). A few questions for those that have done this repair:

1. I replaced the gaskets for the lower and upper intake manifolds about 10 months ago when I replaced the oil pressure switch that's in this exact area. About 2,500 miles driven since then (it's not driven much these days). Do I need to replace the lower and upper intake gaskets again when I make this repair, or are the ones I put in there 10 months ago likely fine?

2. Should I drain all the coolant, or just enough to get the level below the height of the oil cooler to avoid any coolant leaking out into this area when removed?

3. Drain and replace the engine oil after the oil cooler has been replaced?

EDIT: Also, looking for a good source/price for the oil cooler part (Mopar #5184294AE).

Thanks in advance for you insights.

1 i always replace gaskets after i have run them .(is it worth doing again again because you didn't?)

2 i didn't drain the coolent when i did mine ,i just crimped the rear soft hose with hose clamp pliers ,
i lost about a 1/2 cup of fluid total.

3 if you don't flood coolant into any oil passages ,it should be fine.

i had a mechanic friend source and order mine for me ,
i was more concerned it was the latest version and genuine mopar then price

 

Mine has always had that sweet smell and a slow use of coolant. No leaks and runs fine. Took a close look at the valley and didn't see anything. But, wow there is nothing but plastic on that engine. I hope I never have to work on it. Still have the original everything on it. A well timed series of failures could put me out of it. This JK is garaged and never sees temp extremes so I hope that helps. Always use 5-20 oil. Everything being built now days can have problems.