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Infamous 3.6 Pentastar oil cooler strikes

Posted By: GMBoy

Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 11:53 AM

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!
Posted By: Jimzz

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 12:00 PM

Is your part # this MOPAR 68105583AF {#68105583AE} If so rockauto has the OE one for $188 plus shipping.
Posted By: dwcopple

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 12:04 PM

I don't know of this being a problem on Pentastar sedans. Is this a Jeep issue? My 200 isn't leaking
Posted By: GMBoy

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 12:06 PM

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.
Posted By: demarpaint

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 12:07 PM

If that's the only problem you had in 117K miles I'd say you did pretty good.
Posted By: GMBoy

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 12:08 PM

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!!
Posted By: 4WD

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 12:10 PM

https://www.youtube.com/watch?v=u5ec1g0eLno
Posted By: GMBoy

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 12:11 PM

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.
Posted By: demarpaint

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 12:16 PM

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?
Posted By: GMBoy

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 12:16 PM




OMG! I gotta get one of those lol
Posted By: GMBoy

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 12:17 PM

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.
Posted By: Jimzz

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 12:19 PM

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.
Posted By: demarpaint

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 12:39 PM

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.
Posted By: 2015_PSD

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 12:59 PM

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]
Posted By: JC1

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 01:05 PM

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.
Posted By: demarpaint

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 01:12 PM

Originally Posted by JC1
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.

The later models are failing too.
Posted By: GMBoy

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 01:20 PM

Originally Posted by 2015_PSD
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]


The difference with yours only seems to be that it has 1 sensor where mine has 3, the housing design is the same. Mine is $180 on that site - great price. The dealer is $277 which means $299 with tax. Rockauto was out of stock.
Posted By: JC1

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 01:52 PM

Thanks guys. I need to inspect to see if any leaks are occurring. I normally check the oil level once a week, so it's usually not down that much over an entire oil change.
Posted By: sloinker

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 02:14 PM

I replaced mine on a 2014 Grand Caravan at 50k miles. The o rings is where the leaking occurred. About 3 hours of time with cleaning and spark plug change. At least an hour of cleaning. I held on to the original part and will put new seals in it for a spare if needed in the future. Surprised to hear the problem is still happening. Come on FCA, shouldn't be that hard to redesign around this issue.
Posted By: JC1

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 02:48 PM

Originally Posted by sloinker
I replaced mine on a 2014 Grand Caravan at 50k miles. The o rings is where the leaking occurred. About 3 hours of time with cleaning and spark plug change. At least an hour of cleaning. I held on to the original part and will put new seals in it for a spare if needed in the future. Surprised to hear the problem is still happening. Come on FCA, shouldn't be that hard to redesign around this issue.


I agree, but I'm sure the bean counters played a roll in this. Combined with forced EPA fuel ratings that plastic is probably $1 cheaper to make per part and probably is a few ounces lighter which won out.

Unless the aftermarket makes a metal component, I think we are stuck with plastic component.
Posted By: tiger862

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 02:51 PM

I snug the cap. So far no problems in 15k with 6 month OCI and not many changes so far (4). With warranty I hope I don't have do the repair but I hear Chrysler is blaming customers so they refuse to fix. The only thing I fear is I will have to change mine earlier than others as most do yearly or OLM. I wonder if you can use one for 2018.

https://www.mymoparparts.com/oem-parts/mopar-engine-oil-filter-adapter-68310865ab
Posted By: KrisZ

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 03:13 PM

Thanks for the report. thumbsup
I have done all oil changes on our 15 Grand Caravan, no torquing is required, just stop when the flange on the filter cup touches the housing. So at least the housing should not develop any cracks from over tightening. And I shine a light down there every oil change and so far it looks dry. I'm only at 35k miles so hopefully the o-rings or gaskets will hold up for me at least over 100k like in your case.

It's definitely not a robust design for sure.
Posted By: dwcopple

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/15/20 07:23 PM

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!!

sub 14 second 1/4 mile. It screams!
Posted By: dwcopple

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/20/20 01:58 PM

So I pulled my engine cover off yesterday and looked on my 200 engine. Yep, I see oil. It doesn't seem to affect anything though as my level remains constant and it doesn't smell or anything. The repair (on RWD longitudinally) mounted engines looks like a royal PITA. I'd guess it is not so bad on my transverse layout. However, what is the point of changing it and what do I benefit by doing it? Our car has 91K on it and will become my oldest daughter's car in October this year. It's a keeper and has been a great car for us.
Posted By: Skippy722

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/20/20 07:02 PM

Originally Posted by dwcopple
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!!

sub 14 second 1/4 mile. It screams!


You’ll also be screaming when the torque steer kicks in! But yes, I love those little v6 200’s LOL

Originally Posted by dwcopple
So I pulled my engine cover off yesterday and looked on my 200 engine. Yep, I see oil. It doesn't seem to affect anything though as my level remains constant and it doesn't smell or anything. The repair (on RWD longitudinally) mounted engines looks like a royal PITA. I'd guess it is not so bad on my transverse layout. However, what is the point of changing it and what do I benefit by doing it? Our car has 91K on it and will become my oldest daughter's car in October this year. It's a keeper and has been a great car for us.


I thought my 300 was leaking as it had some oil down there, but it never dropped onto the ground and my oil never dropped on the dipstick. I guess some had dropped from the filter during an oil change once and got stuck in there.
Posted By: Jake_J

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/20/20 07:58 PM

As a total aside anybody connected to Mercedes will anyways deny that the Mercedes M276 and the Chrysler Pentastar (both developed during the DaimlerChrysler days) share anything more then their basic 60 degree layout. That maybe true but that oil cooler and euro drop in oil filter housing have Mercedes written all for it in my eyes.
Posted By: dwcopple

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/21/20 01:28 PM

Originally Posted by Skippy722
Originally Posted by dwcopple
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!!

sub 14 second 1/4 mile. It screams!


You’ll also be screaming when the torque steer kicks in! But yes, I love those little v6 200’s LOL

Originally Posted by dwcopple
So I pulled my engine cover off yesterday and looked on my 200 engine. Yep, I see oil. It doesn't seem to affect anything though as my level remains constant and it doesn't smell or anything. The repair (on RWD longitudinally) mounted engines looks like a royal PITA. I'd guess it is not so bad on my transverse layout. However, what is the point of changing it and what do I benefit by doing it? Our car has 91K on it and will become my oldest daughter's car in October this year. It's a keeper and has been a great car for us.


I thought my 300 was leaking as it had some oil down there, but it never dropped onto the ground and my oil never dropped on the dipstick. I guess some had dropped from the filter during an oil change once and got stuck in there.

Oh, maybe that, yeah.
Posted By: mpack88

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/22/20 03:24 AM

I test drove a 2012 chrysler 200s with the Pentastar engine. Thing was a rocket. It sold the next day. Oh well.
Posted By: GMBoy

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/22/20 03:04 PM

Originally Posted by dwcopple
So I pulled my engine cover off yesterday and looked on my 200 engine. Yep, I see oil. It doesn't seem to affect anything though as my level remains constant and it doesn't smell or anything. The repair (on RWD longitudinally) mounted engines looks like a royal PITA. I'd guess it is not so bad on my transverse layout. However, what is the point of changing it and what do I benefit by doing it? Our car has 91K on it and will become my oldest daughter's car in October this year. It's a keeper and has been a great car for us.


Keep an eye on because it won't get better. I haven't heard of any oil leaks suddenly rupture on them, just slow leak like mine that eventually overfilled the engine galley and rolled out the back. But the leak was worse over time and I would want to fix it now when convenient rather then when it/if it lets go which never is a good time. I did a Charger last year that the coolant part ruptured and was a sudden loss of coolant so that is the other failure mode.

It is not a hard job overall and should be easier on your car then on my Jeep. SInce you like it and will keep it - I would fix it as soon as you can.
Posted By: dwcopple

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/22/20 05:12 PM

Can you point me to a part #? How does coolant come into play with it?

is this one junk?
click here to see what ROCK auto has
Posted By: JTK

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/22/20 05:31 PM

Originally Posted by GMBoy

Keep an eye on because it won't get better. I haven't heard of any oil leaks suddenly rupture on them, just slow leak like mine that eventually overfilled the engine galley and rolled out the back. But the leak was worse over time and I would want to fix it now when convenient rather then when it/if it lets go which never is a good time. I did a Charger last year that the coolant part ruptured and was a sudden loss of coolant so that is the other failure mode.

It is not a hard job overall and should be easier on your car then on my Jeep. SInce you like it and will keep it - I would fix it as soon as you can.


True on that. I haven't heard of any catastrophic failures of them. People don't generally catch it until they notice drips on the ground. I've only heard of 1, maybe 2 issues with this on pentastar powered Ram 1500's but that's probably because 3.6's are more prevalent on other models. Would be a pain to do on a Ram. You'd need one of those creepers that allows you to lay over the engine bay. Or maybe take the tires off and lower the vehicle onto jack stands.
Posted By: GMBoy

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/23/20 12:07 PM

Originally Posted by dwcopple
Can you point me to a part #? How does coolant come into play with it?

is this one junk?
click here to see what ROCK auto has


The oil cooler is cooled by engine coolant, not surrounding air like a grill mounted oil cooler. Engine coolant flows thru it as well as oil - each in seperate areas of course. These coolers can fail in 2 ways - coolant or oil leaks.

I am not sure about the RockAuto part, I know it is a value line and only has a 1 yr warranty. The original Mopar part warranty is longer with 2yrs.
Posted By: dwcopple

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/23/20 01:39 PM

I'll have to see if I can find a video of this swap on a FWD application. I don't understand how this is an "oil cooler" though when everything calls this the oil filter housing. I guess YMMV.
Posted By: GMBoy

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/23/20 02:05 PM

Originally Posted by dwcopple
I'll have to see if I can find a video of this swap on a FWD application. I don't understand how this is an "oil cooler" though when everything calls this the oil filter housing. I guess YMMV.


It is an oil filter housing and cooler in the SAME assembly. You can call it anything you like and it is referred to by both names depending where you look for parts. Regardless - the oil COOLER portion is what failed on me and is the weak point.

The engine coolant cools the oil....engine coolant is colder than oil so it pulls heat from the oil and cools the it. Look at your own post with the Rockauto photo and you will see. The oil filter portion is in front where you see it. The cooler sits behind it and the plumbing is all underneath.
Posted By: dwcopple

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/23/20 06:38 PM

Ok gotcha, so was your leaking coolant or oil?
Posted By: dwcopple

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/23/20 07:21 PM

So, if your housing isn't cracked, Fel-Pro 73012 for $30 is the complete o-ring kit to rebuild the stock unit.
Posted By: GMBoy

Re: Infamous 3.6 Pentastar oil cooler strikes - 04/24/20 12:47 PM

Originally Posted by dwcopple
Ok gotcha, so was your leaking coolant or oil?


It was leaking oil. Others I have done were also oil except one, which was coolant.



Originally Posted by dwcopple
So, if your housing isn't cracked, Fel-Pro 73012 for $30 is the complete o-ring kit to rebuild the stock unit.


I imagine if you are certain it is the o-rings and not a crack that would be an economical solution. I would just be concerned, based on the failure pattern, that you may end up later with a cracked/bad housing and do the job all over. If you are doing the repair yourself, nothing lost but your time. If you are paying to have it done - much more money involved. I just chose to replace the entire, we will call it the oil filter/cooler assembly to be done with it.
Posted By: RageOfFury

Re: Infamous 3.6 Pentastar oil cooler strikes - 05/31/20 10:11 PM

Stumbled upon this thread today, then googled the issue and it scared the crap out of me. Went out and checked my Jeep...yup, leaking frown

I have no idea how long it's been like this. I bought the vehicle new in Jan 2015, put on 80,000 KM (~50K miles) since.

[Linked Image]


Posted By: JTK

Re: Infamous 3.6 Pentastar oil cooler strikes - 06/01/20 06:44 PM

Rage- Assuming this is on your 2014 Jeep GC, have you been doing your own oil changes or has a shop been doing them?

Definitely looks like she's starting to pool down there. Has it begun to drip down the back of the engine block yet? I'd try to suck or wash out what you can and see if it comes back just to be sure it's not from spillage. Washing it out could be a mess on the driveway though. If the intake valley is full of oil, it can have close to a quart laying up in there I'm told.
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