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Old 07-02-2011, 02:17 AM
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Turbo oil leak (probably)

Hi guys,
First message here, but a lot of reading. It's been nearly 6 month since I bought my GC featuring an oil leak which I thought was easy to find.
I put it at my local dealer and he found nothing (in France it's really hard to find good mechanics). So I had to find it on my own. I found oil leaking from the region of the turbo and onto the gearbox and spreading everywhere with motion . The leak is quite sensible as I reach max to min level in 6000 miles. I don't know if it's somtehing common?
Next step is to find service manual for 3.0 crd but it's really really hard to find, if someone has a hint?

Thanks for your help
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Old 07-02-2011, 04:47 AM
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Re: Turbo oil leak (probably)

Welcome mate

Leaks aren't common on the three litre. Though it sounds like you have a fairly massive one! I hope you can sort it.
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Old 07-02-2011, 05:19 AM
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Re: Turbo oil leak (probably)

Thanks for your support Marlin
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Old 07-02-2011, 08:41 AM
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Re: Turbo oil leak (probably)

Most probably is leaking on the turbo intake manifold. If it leaks a lot then it can damage swirl motor. To find the leak you have to remove engine cover, then check intake to turbo. If the seal on the intake is orange there is your problem. Replace it with new which is black and problem solved. which year is your CRD??
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Old 07-02-2011, 09:08 AM
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Re: Turbo oil leak (probably)

I posted a list of typical 3.0L CRD oil leak locations in this thread...

http://jeepgarage.org/showthread.php?t=16156

Here are the top 3.0L CRD oil leak locations in order of how often they happen!

1) Air intake tube in front of the turbo. Usually this is a steady drip of oil that eventually makes it way to the bottom of the engine. This issue generally happens on every 3.0L CRD eventually.

2) your oil fill cap was backwards, it leaks if installed backwards. Usually this is a stream of oil versus a drip. Just clean the mess up and reinstall the oil cap properly. This is common after an oil change at a location that does not often service the 3.0L CRD.

3) a third party oil filter - there are known problems with seals on some third party filters (Mann or Wix, can't recall which one had the problem). Generally this releases a fair stream of oil and is visible from the oil filter housing. Just clean the mess up and replace the oil filter with a genuine Mopar or Mercedes part.

4) a leak in your oil cooler - the oil cooler is near impossible to see to confirm this as the location of the leak. It is hidden under the top of the engine components. I will post up a picture if I can find one. The whole top end of the engine has to be taken apart, expensive and time consuming to diagnose and repair. This issue is rarely the problem, but has happened to 2 owners that I'm aware of.

5) a leak in one of the engine block oil galley plugs, here is a thread that shows them http://sprinter-source.com/forum/showthread.php?t=11326 Some galley plugs are near impossible to easily find, usually this will be a drip versus a stream of oil. An inspection scope helps to locate this one. Time consuming, but not overly expensive from a parts perspective to repair. This issue is rarely the problem, but has happened to 1 owner that I'm aware of.

6) Rear main seal. To confirm this, there is a black rubber plug on the bottom of the transmission bell housing, you can pop it off and access the flywheel. But the black rubber plug also gives some access to checking for a rear main seal leak. This starts as a drip and develops into a stream of oil. This is an expensive repair from a labor perspective because the transmission has to be removed. This issue is rarely the problem but has happened at least once that I'm aware of.

7) your crankcase breather valve or crankcase breather hose are plugged, usually the dipstick will blow out if this happens, however, according to what I've read, this can cause a rear main seal failure. Remove the crankcase breather hose and check for an obstruction. This is a more rare problem versus the others I've identified.

8) Turbo manifold seal. More likely this would've clogged before it failed. Lack of lubrication to the turbo will cause it to fail. This starts as a drip and develops into a stream of oil. This issue is rarely the problem, I've not read about a 3.0L CRD owner with this problem but arguably it could happen.


As you can see, many leaks start as a "drip" and work there way up to a more steady leak. You need to watch for the telltale drips and have them checked before they turn into a stream. By the time a leak is a stream, it can be more expensive and costly to repair.
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Old 07-03-2011, 02:43 AM
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Re: Turbo oil leak (probably)

Thank you guys for your detailed answers, mine is a 2007 with 57000 miles.
I'll insvestigate from tomorrow each item you quoted. "Unfortunately" I'm living for a two weeks holidays by the end of next week. So time will be limited.
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Old 07-04-2011, 06:49 AM
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Re: Turbo oil leak (probably)

1) Air intake tube in front of the turbo. Checked nOK (see pictures):
Oil on the crankcase coming from both blow-by hose and compressor inlet hose. Leaking due to poor quality orange seal (one of them has a hole in it).

It does not explain oil consumption. I think the Yacco 5W30 which is now in the engine is no good. Correct me if I'm wrong but this engine is not designed for such oil. Some carmakers had some issues with this kind of oils (especially consumption) and had to re-engineer piston rings.
If I start the engine for 2-3 min. And shut it down I have blowby evaporating from the oil filling hole which seems quite rapid.
Or maybe I have my "oil catch-tank" not working, I'll try to check tomorrow.

2) your oil fill cap was backwards, checked OK

3) a third party oil filter - checked OK

6) Rear main seal. checked couple of month ago, that's what I was very afraid of, bu every thing's OK.

8) Turbo manifold seal, I could not find and reach turbo lubrication given the time I had.
Attached Images
File Type: jpg Intake.jpg (317.7 KB, 67 views)
File Type: jpg BBY_Hose.jpg (291.8 KB, 55 views)
File Type: jpg Compressor_Inlet.jpg (250.5 KB, 55 views)
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Old 07-04-2011, 08:39 AM
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Re: Turbo oil leak (probably)

The oil you see at the air intake tube is typical of what the diesel produces. The problem is 2 fold:
1) if the orange seal leaks, the oil drips on to the engine and makes it away to the bottom of the engine and looks like it is coming from elsewhere. along the way, the oil can contaminate sensitive electronics and cause a failure, this is very typical. Chrysler released a revised intake tube and black seal, the part number is 53013672AE. Its about $100.
2) the oil is sucked into the turbo and eventually clogs up the intake system, especially when it mixes with the sooty gases from the EGR.
The recommended fix is a http://jeepgarage.org/showthread.php?t=7513

Modern DPF equipped diesels are supposed to use 229.51 oils, a list is available at the Mercedes website http://bevo.mercedes-benz.com/bevoli...9baa77efdc62fa
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Old 07-04-2011, 09:03 AM
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Re: Turbo oil leak (probably)

I don't think MB 229.51 means 5W30? And I don't think I have a DPF (not sure)

On the right valve cover there is an oil catch tank which should separate evaporated oil from the combustion gases that leak from combustion chamber through pistons rings.
According to what I said above, running the engine for 2 minutes and you have lot of "oil" vapor (not water) coming out of the oil filling hole. So I will start by changing oil for higher grade oil and check the catch tank (may be later cleaning the intake line especially the intercooler to increase its efficiency).
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Old 07-04-2011, 09:14 AM
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Re: Turbo oil leak (probably)

Quote:
Originally Posted by ZF1FR View Post
I don't think MB 229.51 means 5W30?

On the right valve cover there is an oil catch tank which should separate evaporated oil from the combustion gases that leak from combustion chamber through pistons rings.
No, 229.51 is an oil specification, it does not mean 5w30. Look on the back of the oil container in the store, you will see what specifications it meets before you buy it. I always ask the dealer to show me the oil before they change it in my Jeep so I can confirm it is the correct oil.

you should post a picture of your oil catch tank, perhaps someone installed an oil catch tank because no factory Jeep has ever came with one that I'm aware of.
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Old 07-04-2011, 09:48 AM
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Re: Turbo oil leak (probably)

Catch can is common on the engines I know. My guess is it's the plastic part before the blow-by hose. Oil into the intake is no good for car manufacturer either because burning oil doesn't help with soot formation and pollutant control on homologation tests.
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Old 07-04-2011, 09:55 AM
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Re: Turbo oil leak (probably)

That is actually your PC valve, it is not a catch can. That valve is supposed to maintain the correct (positive) crankcase pressure. You install a catch can in the hose between that valve and the air intake tube.

Hopefully that helps!
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