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Infamous 3.6 Pentastar oil cooler strikes #5403623 04/15/20 06:53 AM
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GMBoy Offline OP
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I'm sure most of you are aware of the pattern failures of 3.6L Pentastar engines used in Dodge/RAM/Jeep vehicles where they leak. It can leak oil or coolant or both. Most of the failures are attributed to oil change personnel overtightening the oil cap which stresses the plastic. But it will also fail on it's own in other ways such as what happened to mine. I've probably changed 5 or 6 over the years on other folks vehicles. You have to remove the intake and it sits deep down in the valley of the motor. Not a difficult job but a lot of small stuff to do keep cleared to reach it.

Well, the cooler in the wifes 2014 Jeep Grand Cherokee Overland finally blew its cooler this week - oil everywhere. I been holding my breath since we got it in 2014 for when it would happen to us....we made it to 117k miles which my be a record for an original 3.6 oil cooler LOL! Anyhow - bit the bullet and paid the $300 for the OEM part from the dealer. Once last year somebody brought me an ebay cooler they paid $75 for and it lasted exactly a year. This is not a job you want to keep doing so buy the OEM if possible, It has a 2yr warranty. Also make sure you get the correct one....they were changed in 2014. There is one for 2013 prior and one for 2014 and up. While I was in there, and intake off for needed room, I did the spark plugs and both valve cover gaskets. This is the first problem this vehicle has given in 117k miles - just great quality Jeep.

Just rambling on fellows - have a great day!

Re: Infamous 3.6 Pentastar oil cooler strikes [Re: GMBoy] #5403628 04/15/20 07:00 AM
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Jimzz Offline
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Is your part # this MOPAR 68105583AF {#68105583AE} If so rockauto has the OE one for $188 plus shipping.


yup
Re: Infamous 3.6 Pentastar oil cooler strikes [Re: GMBoy] #5403632 04/15/20 07:04 AM
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dwcopple Offline
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I don't know of this being a problem on Pentastar sedans. Is this a Jeep issue? My 200 isn't leaking


2017 Acura MDX SH-AWD
2011 Chrysler 200 Limited 3.6L V6
1998 Mustang GT 4.6L V8 convertible
2019 VW Jetta SEL 1.4T
Re: Infamous 3.6 Pentastar oil cooler strikes [Re: Jimzz] #5403636 04/15/20 07:06 AM
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GMBoy Offline OP
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Originally Posted by Jimzz
Is your part # this MOPAR 68105583AF {#68105583AE} If so rockauto has the OE one for $188 plus shipping.



Rockauto only listed 1 option (not Mopar) and it was out of stock.

Re: Infamous 3.6 Pentastar oil cooler strikes [Re: GMBoy] #5403638 04/15/20 07:07 AM
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demarpaint Offline
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If that's the only problem you had in 117K miles I'd say you did pretty good.


God Bless Our Troops

Re: Infamous 3.6 Pentastar oil cooler strikes [Re: dwcopple] #5403639 04/15/20 07:08 AM
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GMBoy Offline OP
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Originally Posted by dwcopple
I don't know of this being a problem on Pentastar sedans. Is this a Jeep issue? My 200 isn't leaking


Yes it is across the board. I've done a few Chargers and Challengers and a Caravan.-

I didn't know the 200 could have the 3.6 - that must be a little rocket!!

Last edited by GMBoy; 04/15/20 07:08 AM.
Re: Infamous 3.6 Pentastar oil cooler strikes [Re: GMBoy] #5403642 04/15/20 07:10 AM
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Re: Infamous 3.6 Pentastar oil cooler strikes [Re: GMBoy] #5403643 04/15/20 07:11 AM
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I will add this - when it leaks and starts leaking slow - the oil builds up in the valley and you won't know it until if fills up and starts running out the back of he motor down the trans. We sucked out a quart of oil on my wifes that was laying in there - no oil burning smell at all! Take a flashlight and shine down all around the oil cap area and look for evidence of oil. It can leak for awhile until you notice it.

Re: Infamous 3.6 Pentastar oil cooler strikes [Re: GMBoy] #5403646 04/15/20 07:16 AM
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demarpaint Offline
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Originally Posted by GMBoy
Originally Posted by dwcopple
I don't know of this being a problem on Pentastar sedans. Is this a Jeep issue? My 200 isn't leaking


Yes it is across the board. I've done a few Chargers and Challengers and a Caravan.-

I didn't know the 200 could have the 3.6 - that must be a little rocket!!

How long did it take you to do?


God Bless Our Troops

Re: Infamous 3.6 Pentastar oil cooler strikes [Re: 4WD] #5403648 04/15/20 07:16 AM
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GMBoy Offline OP
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OMG! I gotta get one of those lol

Re: Infamous 3.6 Pentastar oil cooler strikes [Re: demarpaint] #5403650 04/15/20 07:17 AM
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GMBoy Offline OP
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Originally Posted by demarpaint
Originally Posted by GMBoy
Originally Posted by dwcopple
I don't know of this being a problem on Pentastar sedans. Is this a Jeep issue? My 200 isn't leaking


Yes it is across the board. I've done a few Chargers and Challengers and a Caravan.-

I didn't know the 200 could have the 3.6 - that must be a little rocket!!

How long did it take you to do?


1.5 hr. 30 minutes was spent just cleaning the intake all out and making sure I got all the oil off the motor.

Last edited by GMBoy; 04/15/20 07:19 AM.
Re: Infamous 3.6 Pentastar oil cooler strikes [Re: GMBoy] #5403651 04/15/20 07:19 AM
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Jimzz Offline
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Originally Posted by GMBoy
Originally Posted by Jimzz
Is your part # this MOPAR 68105583AF {#68105583AE} If so rockauto has the OE one for $188 plus shipping.



Rockauto only listed 1 option (not Mopar) and it was out of stock.


Yea you have to search by part number. Some OE parts do not have all the makes/models listed so they will not show up on a vehicle search, only part #.


Originally Posted by dwcopple
I don't know of this being a problem on Pentastar sedans. Is this a Jeep issue? My 200 isn't leaking


Yep, seems these will start to leak around 100-120k on average. Many times its just the seals. But its such a pain to get to better to get a OE housing with new orange seals and replace. Don;t use the black seals.


yup
Re: Infamous 3.6 Pentastar oil cooler strikes [Re: GMBoy] #5403660 04/15/20 07:39 AM
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demarpaint Offline
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Originally Posted by GMBoy
Originally Posted by demarpaint
Originally Posted by GMBoy
Originally Posted by dwcopple
I don't know of this being a problem on Pentastar sedans. Is this a Jeep issue? My 200 isn't leaking


Yes it is across the board. I've done a few Chargers and Challengers and a Caravan.-

I didn't know the 200 could have the 3.6 - that must be a little rocket!!

How long did it take you to do?


1.5 hr. 30 minutes was spent just cleaning the intake all out and making sure I got all the oil off the motor.

Thanks! Not bad at all as far as time goes. I heard cases of the O-Rings they were using early on being a source of an oil leak, as well as the housing cracking. Certainly a weak link. Why they didn't use aluminum/metal for that housing is odd, especially since there have been a few revisions to the part.


God Bless Our Troops

Re: Infamous 3.6 Pentastar oil cooler strikes [Re: GMBoy] #5403673 04/15/20 07:59 AM
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Originally Posted by GMBoy
Most of the failures are attributed to oil change personnel overtightening the oil cap which stresses the plastic.
Which is why I use a torque wrench to tighten mine every single time so that I do not over tighten it. Unless I am missing something, it looks like I could get the entire OEM assembly for my 2019 for about $95 from Factory Chrysler Parts (Item 1 in the image):

https://www.factorychryslerparts.com/products/ADAPTER-ENGINE-OIL-FILTER/13295899/68365931AA.html

[Linked Image from factorychryslerparts.com]


2019 o)|||||(o Rubicon Wrangler Unlimited 3.6L V6 [Kendall GT-1 Max + Ultra]
2018 Mercedes Benz C300 2.0L Turbo [Pennzoil Platinum + Mann filter]
Re: Infamous 3.6 Pentastar oil cooler strikes [Re: GMBoy] #5403678 04/15/20 08:05 AM
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Originally Posted by GMBoy
I will add this - when it leaks and starts leaking slow - the oil builds up in the valley and you won't know it until if fills up and starts running out the back of he motor down the trans. We sucked out a quart of oil on my wifes that was laying in there - no oil burning smell at all! Take a flashlight and shine down all around the oil cap area and look for evidence of oil. It can leak for awhile until you notice it.


Thanks for the info.

Do you know if the newer models are ok and don't leak? I change my own oil and I don't go nuts when tightening down the oil filter cap. However last time, the spring on the oil filter cap came loose from the cap, so I need to order a new one of those.


2015 Grand Caravan SXT Plus 0w-20 Pennzoil Ultra/Fram Ultra Filter
1997 Honda Civic CX 5w-30 PPPP/Fram Ultra Filter
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