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Old 09-22-2006, 06:44 PM   #1
hkpierce
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Default Know your 2.7l Engines

North American Sprinters with 2.7L I-5 engines come in two flavors: OM612 (2001-2003) and OM647 (2004-2006). They are distinquishable by their intake manifolds. The top image with the turbo looking intake is attached to OM612s, and the elephant trunk looking intake is attached to OM647s. Most of the differences are related to the EGR valve and various related electronics and sensors downstream of the air filter. Most parts for the block are the same, though the low pressure fuel pump was moved off the 612 head to the tank.

OM612:
612 intake.jpg

OM647
647 Intake.jpg

Last edited by hkpierce; 05-10-2012 at 07:16 PM. Reason: Image placement
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Old 01-02-2008, 02:56 PM   #2
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Default Re: Know your 2.7l Engines

BULBASOR has the elephant's trunk.

Thanks Mr. Pierce
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Old 02-21-2008, 01:04 PM   #3
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Default Re: Know your 2.7l Engines

In the 612 pic what is #11 mine seems to be blowing out oil. Is this normal? I smell oil burning in the cab B/C of this I was wondering if this is a quick fix or what any help would be much appriciated.
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Old 02-21-2008, 01:37 PM   #4
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Default Re: Know your 2.7l Engines

I do not know very much about the engine except that it's got an elephants trunk and smoke is a bad thing. There are many people her that are much smarter than me that might be able to help.

HEY!HEY !! anyone out there?


Hey, Dr A or Seek, it sounds like this person needs some of your expert advice.
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Old 02-21-2008, 03:35 PM   #5
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Default Re: Know your 2.7l Engines

Quote:
Originally Posted by brandon View Post
In the 612 pic what is #11 mine seems to be blowing out oil. Is this normal? I smell oil burning in the cab B/C of this I was wondering if this is a quick fix or what any help would be much appriciated.
That's the EGR (exhaust gas recycle) valve and it can drip out some of the blowby oil in the charge. The blowby oil is in the charge because the engine breather dumps into the turbo inlet air stream. A new valve will not drip oil, but a 612 engine EGR valve will eventually drip oil. If your emission warranty is still in force, you can get it replaced by the dealer under warranty. An oil drip is grounds. If not still under warranty, you can (as I did) enlarge the weep hole and tap it for 1/8" NPT, add a nipple and a hose to direct the drip to the road. I also used the blue silicone gasket material to seal around the plastic cover on top of the valve and wrapped the nipple I added with a short piece of cloth "wick" to encourage the oil that collects in the bottom cup of the valve operator to follow the outside of the hose to the road.

Thinking more though, I wonder if you're smelling this oil burning in the cab? The oil drip from this would wet the intake side of the engine, not the exhaust side. Suspecting the odor might be from another source, I would remove the plastic cylinder head cover (on top of engine) and check the injector wells to make sure you don't have a leaking injector seal (seal between the injector body and the head). If one of those is leaking, you would see oil or tar-like deposits. If you do discover deposits, quick action to repair is necessary.
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Old 02-21-2008, 04:07 PM   #6
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Default Re: Know your 2.7l Engines

Hey Talking horse,

Do you recomend us to all remove the plasic covers on our endines to check for leaks or will there be an obvious smell to indicate this is needed? I have the elephants trunk engine but I do have a plastic cover on top. Is this somthing we should all check? Is it hard to remove?

Thanks
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Old 02-21-2008, 04:14 PM   #7
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Default Re: Know your 2.7l Engines

Quote:
Originally Posted by BULBASOR View Post
Hey Talking horse,

Do you recomend us to all remove the plasic covers on our endines to check for leaks or will there be an obvious smell to indicate this is needed? I have the elephants trunk engine but I do have a plastic cover on top. Is this somthing we should all check? Is it hard to remove?

Thanks
I remove mine at least at every oil change. It's easy and quick; just 7 or so allen head machine screws. I don't know if such frequent checking is necessary, but the possible consequences are so dire that I have decided to.
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Old 02-21-2008, 05:48 PM   #8
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Default Re: Know your 2.7l Engines

Here Is A Picture Of The Suspected Leakage/ Smell


p.s. any pic would help as I am veeeeeeeeeeeeeeeeerrrrrrrrrrrrrrrrrrrryyyyyyyyyy ssssssssssssllllllllllllllllllloooooooooooowwwwwww

well not that slow but you get the point.
Attached Images
File Type: jpg PICT0051.jpg (56.4 KB, 2041 views)
File Type: jpg PICT0052.jpg (57.7 KB, 1942 views)

Last edited by brandon; 02-21-2008 at 06:02 PM. Reason: add text
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Old 02-21-2008, 05:56 PM   #9
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Default Re: Know your 2.7l Engines

Thanks TalkingHorse, I will check mine this weekend. I sure hope someone can help Brandon.
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Old 02-21-2008, 06:15 PM   #10
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Default Re: Know your 2.7l Engines

Quote:
Originally Posted by brandon View Post
In the 612 pic what is #11 mine seems to be blowing out oil. Is this normal? I smell oil burning in the cab B/C of this I was wondering if this is a quick fix or what any help would be much appriciated.
Please review the following threads to help

Cleaning MAF and EGR every 20K miles
EGR Discussion, part numbers, etc.

And due to your year, please look at the following good help by HKPierce

EGR Postings (Yahoo group and others)

Best wishes.

Tim
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