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Old 02-18-2012, 10:10 PM   #1
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Strange place for oil leak

I found a oil leak that just started !!!! The motor mount on the block of the engine has some unused holes that are on driver side. I took a cell phone picture from under the jeep. The large hole at top of picture that is not threaded is dripping oil out of it a small amount It must have a small pin hole in it that open up!! strange for sure!!!! has anyone else had this ???? I have 18000 miles on it never leak a drop then out of the blue. The drip started took a while to find it. Dry out hole with rag then start the engine and there is drip out the hole after 15 mins running. Any ideals for a fix ?????
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Old 02-18-2012, 11:50 PM   #2
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Anyone???

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Old 02-18-2012, 11:56 PM   #3
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What year is it? Are you sure it's oil and not coolant?
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Old 02-19-2012, 12:00 AM   #4
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It's a 2007. It's oil for sure !!
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Old 02-19-2012, 12:09 AM   #5
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If the holes are threaded, put some rectorseal on a bolt and close it up. If not, find out what is behind the mount and look for a crack, hole, or seeping gasket.
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Old 02-19-2012, 08:18 AM   #6
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There must be a small pin hole in there!!!! it is not threaded . I was thinking of pulling mount and tap some threads and put a plug in ??? Or could you fill it with some kind filler that takes high heat without pulling mount?? I have extended warranty $ 100. Deductible hate to take it to dealer rather fix myself Just trying to find a easy fix. Looking for ideals.
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Old 02-19-2012, 08:33 AM   #7
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I once had a cracked water jacket on a Ford Y-Block V-8. It did not affect the engine's performance but water poured out. I cleaned the area well, used a grinder and cut a little move V into the crack, and then filled it with high-temp J-B Weld. You can probably fix it with J-B Weld too but you will need to get the motor mount out of the way so you can work on the block. However, if it is truly oil, it might be under pressure and the flaw in the block may only be at the beginning of its problem. You have a warranty. You should use it. You will probably get a new short block out of the deal. That is a very good thing since you have an 07 and it may become an oil burner once it actually gets some miles on it. (Did you forget to drive your Jeep?)
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Old 02-19-2012, 08:39 AM   #8
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Personally I would use the warranty. If you try something yourself and make it worse or doesn't fix it then chances are they will not honor the warranty. $100 is cheap compared to a new engine block + labor.
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Old 02-19-2012, 08:59 AM   #9
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Like OH9JK says, if you have any warranty--useit-

Otherwise, the chances of the structural metal of the block, breaking down at the motor mount and leaking by coinciding with an oil passage are --NIL !

Directly aft and an 1" or so higher is a plug for an oil sensor/line option and it could be leaking a tiny mount of oil that FINDS ITS WAY to the motor mount-could also be the drivers side valve cover that is leaking and the gravity fed oil path--FINDS THAT HOLE !!

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Old 02-19-2012, 09:53 AM   #10
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I clean off all oil and the hole too. Then i start it up let it run 15 mins and that hole starts show fresh oil seeping out of hole I have check for oil on valve covers and head and its all clean and dry and check timing chain gasket is clean and dry . I didn't see any sensor above the mount but I will check again I don't much of any oil above the mount area all is dry and clean
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Old 02-19-2012, 10:23 AM   #11
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You may have a rare one--look a couple inchs BEHIND (AFT) of the mount for the pipe-plugged hole !


Quote:
Originally Posted by Bwgas View Post
I clean off all oil and the hole too. Then i start it up let it run 15 mins and that hole starts show fresh oil seeping out of hole I have check for oil on valve covers and head and its all clean and dry and check timing chain gasket is clean and dry . I didn't see any sensor above the mount but I will check again I don't much of any oil above the mount area all is dry and clean
Good luck

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Old 02-19-2012, 02:01 PM   #12
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Quote:
Originally Posted by Bwgas View Post
I found a oil leak that just started !!!! The motor mount on the block of the engine has some unused holes that are on driver side. I took a cell phone picture from under the jeep. The large hole at top of picture that is not threaded is dripping oil out of it a small amount It must have a small pin hole in it that open up!! strange for sure!!!! has anyone else had this ???? I have 18000 miles on it never leak a drop then out of the blue. The drip started took a while to find it. Dry out hole with rag then start the engine and there is drip out the hole after 15 mins running. Any ideals for a fix ?????
I understand there has been some issues with Casting Porosity in some of the block and head castings... This may be your issue. I'd seek the Dealer if it's still under warranty ..... JMO "BH"
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Old 02-19-2012, 04:08 PM   #13
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JB Weld. Clean it up good, rough the surface up a little, and apply the putty. I have a patch on my air compressor for 3 years now and still holding at 125 psi.
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Old 02-20-2012, 08:34 AM   #14
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There are such things as hydraulic motor mounts but I don't know whether Jeep uses them. When a hydraulic motor mount fails the motor will sag down. Ferrari V12 motors are known to do this and when the motor sags it breaks an oil pipe with a typical repair cost of over $20k.

Don't know about the Jeep's mounts.
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Old 02-20-2012, 09:00 AM   #15
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As previously stated, use your warranty! Provided the oil is in-fact leaking from that hole & not originating from somewhere else that you're overlooking or not seeing, it could indicate just the beginning of a serious issue. Sure, you could probably stop such a slow leak via other methods, but the reality is your just putting a band aid on it without addressing the root cause. A sudden, slow leak now is bound to get worse in time, and so will the source of it.

Like most of us, I can't stand the stealership & avoid them at all costs, plus I like working on my vehicles... but in this case, I wouldn't. As previously mentioned, you'll most likely void your warranty, at least relative to this issue, if you attempt to 'fix' it yourself.
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Old 02-20-2012, 09:50 AM   #16
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18,000 miles for a 2007? Dude, you need to get out more!

Didn't you get in under the Lifetime warranty?
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Old 02-20-2012, 10:21 AM   #17
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Quote:
Originally Posted by Bigdawg0114
As previously stated, use your warranty! Provided the oil is in-fact leaking from that hole & not originating from somewhere else that you're overlooking or not seeing, it could indicate just the beginning of a serious issue. Sure, you could probably stop such a slow leak via other methods, but the reality is your just putting a band aid on it without addressing the root cause. A sudden, slow leak now is bound to get worse in time, and so will the source of it.

Like most of us, I can't stand the stealership & avoid them at all costs, plus I like working on my vehicles... but in this case, I wouldn't. As previously mentioned, you'll most likely void your warranty, at least relative to this issue, if you attempt to 'fix' it yourself.
That's why I ask you guys on forum good ideals and I think you are right I will be off to the dealer Tuesday see what they will do I am 2nd owner no life time warranty but I got max care factory warranty $100. Duct.
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Old 02-20-2012, 10:35 AM   #18
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As weird and simple as this sounds, get a tube of hi-temp silicone sealer or JB weld, clean the hole out good with brake cleaner, put a dab in the hole, and hammer in a small cork that fits the hole nice. Let it dry a few hours and check for leaks.

On Caterpillar tractors, the rear casted frames are drilled and tapped for different attachments (winches,rippers, etc.). When the holes aren't used, the factory puts corks in them.
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Old 02-20-2012, 10:36 AM   #19
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Quote:
Originally Posted by redrockman View Post
JB Weld. Clean it up good, rough the surface up a little, and apply the putty. I have a patch on my air compressor for 3 years now and still holding at 125 psi.
On the tank or on the motor/pump head? If it's tank... keep up to date on your life insurance for your family's sake!
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Old 02-20-2012, 10:55 AM   #20
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I will say it again but clearer this time, don't be cheap. Spend the $100 and get it fixed correctly. You saving a little bit with JB Weld will probably cost you several thousand dollars in the future for a new block that will not be under warranty. Sometimes being a cheapass is the worst thing. This may be a great opportunity to get a new block and yours may be one of those 07's that will start burning oil once you remember to drive it a little.
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Old 02-20-2012, 11:09 AM   #21
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Quote:
Originally Posted by tjt94
I will say it again but clearer this time, don't be cheap. Spend the $100 and get it fixed correctly. You saving a little bit with JB Weld will probably cost you several thousand dollars in the future for a new block that will not be under warranty. Sometimes being a cheapass is the worst thing. This may be a great opportunity to get a new block and yours may be one of those 07's that will start burning oil once you remember to drive it a little.
Yes you are right I plan to take it to Autowest,Roseville,ca I hope they treat me right I did not buy from them but they are only 5 miles from me . I do have a question for everybody on driver side motor mount oil stick side the mount on the block has 3 unused holes. One is a small threaded not used and a large one with no threads and one above that on with a plug hex female plug Is that like yours ??????
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Old 02-20-2012, 11:50 AM   #22
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It's a male plug and what have I been saying all along ???


Quote:
Originally Posted by Bwgas View Post
Yes you are right I plan to take it to Autowest,Roseville,ca I hope they treat me right I did not buy from them but they are only 5 miles from me . I do have a question for everybody on driver side motor mount oil stick side the mount on the block has 3 unused holes. One is a small threaded not used and a large one with no threads and one above that on with a plug hex female plug Is that like yours ??????
Takeit to the dealer-

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Old 02-20-2012, 12:12 PM   #23
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Quote:
Originally Posted by JIMBOX
It's a male plug and what have I been saying all along ???

Takeit to the dealer-

--JIMBO
There a plug above the mount area on side of block small just to rear of mount ( no leak their) but there a larger plug on the mount it self. Is that like yours ??? And below that plug is a hole with no threads ???
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Old 02-20-2012, 12:42 PM   #24
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--BINGO--


Quote:
Originally Posted by Bwgas View Post
There a plug above the mount area on side of block small just to rear of mount ( no leak their) but there a larger plug on the mount it self. Is that like yours ??? And below that plug is a hole with no threads ???
The larger plug (1/2" pipe plug)?, is there and mine is sealed--so's the plug to the rear, looks like 3/8" pipe plug--

Even if you can see oil leaking from the one directly above the "threadless hole"--there may not be any thing you can do, without removing the motor mount on the drivers side !

Lotta work, but doable !!

Good luck

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Old 02-20-2012, 12:43 PM   #25
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Quote:
Originally Posted by JIMBOX
It's a male plug and what have I been saying all along ???

Takeit to the dealer-

--JIMBO
Here a poor picture of a book I had of side engine I will be going to dealer and will follow up with what they say thanks for all your help
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Old 02-20-2012, 12:46 PM   #26
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Quote:
Originally Posted by JIMBOX
--BINGO--

The larger plug (1/2" pipe plug)?, is there and mine is sealed--so's the plug to the rear, looks like 3/8" pipe plug--

Even if you can see oil leaking from the one directly above the "threadless hole"--there may not be any thing you can do, without removing the motor mount on the drivers side !

Lotta work, but doable !!

Good luck

JIMBO
FYI. It's the thread less hole that's seeping. I am glad to see your top plug is there now I know mine is factory no mess with it Thanks !!!
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Old 02-20-2012, 12:54 PM   #27
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Wow !--if you can get that close and verify it--there isn'
t anything you can do and -

Quote:
Originally Posted by Bwgas View Post
FYI. It's the thread less hole that's seeping. I am glad to see your top plug is there now I know mine is factory no mess with it Thanks !!!
If you have to pay several thousand bucks for a non-warranty fix-

It would probably be better to swap a crate 3.8L in place of your "injured" v6 and it may cost as much or a little more, but the dealer is just going to inspect, if they'll go for a shortblock swap--I'd go for that, but watch the charges man !!

Good luck

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Old 02-12-2014, 01:05 PM   #28
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3.8 oil leak

Hey everyone, new to the forum and i'm beyond desperate for help. My 3.8 jk has sprung a leak from a hole on the side of the block where the motor mount bolts to the block. It appears there are a series of holes, two of which are threaded and have plugs in them, a low point hole that seems like some auxiliary oil port for something on the driverside, anyway oil is rolling out from there, the hole is not threaded and it almost seems like a freeze plug (for lack of better term) went there... can anybody help? I can't find anything on this.

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