Leaking oil
Thread Starter
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Fleet Mechanic
Joined: Oct 2007
Posts: 1,712
Likes: 18
From: Henderson, NV
Leaking oil
I added a picture to my gallery, if someone wouldn't mind taking a look, of a leak. The picture was taken up inside the passenger side wheel well just above the exhaust manifold. I've been having a problem towing a 4500lb trailer, the truck lacks power after the engine fan comes on.
Thank you.
Thank you.
Elder User
Joined: Sep 2004
Posts: 821
Likes: 1
From: Nashville
Looks like a leaky glow plug connector. Easy fix, if so. The tech can use UV dye to confirm the source of the leak. Mine had the same thing on driver's side. First they tried a new o-ring on the leaking connector but that didn't work so they replaced the whole buss bar and that fixed it.
I don't think the leak is related to your lack of power.
I don't think the leak is related to your lack of power.
Thread Starter
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Fleet Mechanic
Joined: Oct 2007
Posts: 1,712
Likes: 18
From: Henderson, NV
Originally Posted by moebdick
Looks like a leaky glow plug connector. Easy fix, if so. The tech can use UV dye to confirm the source of the leak. Mine had the same thing on driver's side. First they tried a new o-ring on the leaking connector but that didn't work so they replaced the whole buss bar and that fixed it.
I don't think the leak is related to your lack of power.
I don't think the leak is related to your lack of power.
Thank you for the reply post.
Elder User
Joined: Sep 2004
Posts: 821
Likes: 1
From: Nashville
Can't rule out a head gasket, but it looks like it's coming from above that. Could even be more than one source. The dye test will tell for sure.
The lack of power could be a fuel system issue. I would check the fuel system pronto since low fuel pressure can damage injectors quick.
The lack of power could be a fuel system issue. I would check the fuel system pronto since low fuel pressure can damage injectors quick.
Postmaster
Joined: Dec 2003
Posts: 4,196
Likes: 10
From: Arizona
Originally Posted by jmaskew
I was thinking the leak had something to do with the head gasket. I have taken it to the dealer and they said oil cooler is fine. I had the dealer flush the engine coolant and service the tranny. The EGR cooler was replace last month, the turbo was cleaned last week. I think I will take it to another dealer in town. I find it quite odd that I can only pull a 4500lb trailer 40mph up a hill when a Duramax passes me with a 5th wheel considerably faster. When I am not pulling a trailer it runs like a champ. There has to be a Diesel Tech in town that knows why I am over heating and losing power.
Thank you for the reply post.
Thank you for the reply post.
Thread Starter
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Fleet Mechanic
Joined: Oct 2007
Posts: 1,712
Likes: 18
From: Henderson, NV
Originally Posted by moebdick
Can't rule out a head gasket, but it looks like it's coming from above that. Could even be more than one source. The dye test will tell for sure.
The lack of power could be a fuel system issue. I would check the fuel system pronto since low fuel pressure can damage injectors quick.
The lack of power could be a fuel system issue. I would check the fuel system pronto since low fuel pressure can damage injectors quick.
Originally Posted by blackhat620
Lack of power do to engine overheating could be do to a bad EOT sensor or improperly working Visconic Fan Clutch.
Thread Starter
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Fleet Mechanic
Joined: Oct 2007
Posts: 1,712
Likes: 18
From: Henderson, NV
Since I started this thread I have had my head gaskets replaced but the oil leak is still there. This afternoon I started up the truck and looked at the exhaust manifold with a flashlight and noticed oil bubbling from it. I checked both bolts from where it was bubbling and they were a little loose so I tightened them. It is still bubbling a little. Is it normal for oil to leak like that from a leaky exhaust manifold? Thank you in advance!
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Junior User
Joined: Mar 2007
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I would look real hard at the rocker arm covers, to see if oil is running down on to your manifolds. The service advisor needs some schooling if he thinks the egr cooler is where oil and water meet?? Are you sure you did not see water in your tail pipe and not oil when the egr cooler went bad....
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Thread Starter
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Fleet Mechanic
Joined: Oct 2007
Posts: 1,712
Likes: 18
From: Henderson, NV
Originally Posted by TreeTech
I would look real hard at the rocker arm covers, to see if oil is running down on to your manifolds. The service advisor needs some schooling if he thinks the egr cooler is where oil and water meet?? Are you sure you did not see water in your tail pipe and not oil when the egr cooler went bad....
Thread Starter
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Fleet Mechanic
Joined: Oct 2007
Posts: 1,712
Likes: 18
From: Henderson, NV
Originally Posted by moebdick
You never mentioned whether or not the dealer ran a UV dye test. Did they do one? If so what did it reveal?
Elder User
Joined: Sep 2004
Posts: 821
Likes: 1
From: Nashville
The glow plug connectors have o-rings that are supposed to prevent oil from leaking out where they pass through the hole in the head. If the o-ring does its job, the connector and the surrounding area should be dry. If it doesn't, oil can leak out and will wet the connector and then drip down on the exhaust manifold bolts below it.
Here's a picture of mine when it was leaking:
This leak was verified using UV dye in the oil. THe dealer then tried replacing just the o-ring, but when that didn't work they ended up replacing the entire buss bar (all four connectors).
It sounds like your glow plug connector may be leaking.
Here's a picture of mine when it was leaking:
This leak was verified using UV dye in the oil. THe dealer then tried replacing just the o-ring, but when that didn't work they ended up replacing the entire buss bar (all four connectors).
It sounds like your glow plug connector may be leaking.
Thread Starter
|
Fleet Mechanic
Joined: Oct 2007
Posts: 1,712
Likes: 18
From: Henderson, NV
Originally Posted by moebdick
The glow plug connectors have o-rings that are supposed to prevent oil from leaking out where they pass through the hole in the head. If the o-ring does its job, the connector and the surrounding area should be dry. If it doesn't, oil can leak out and will wet the connector and then drip down on the exhaust manifold bolts below it.
Here's a picture of mine when it was leaking:
This leak was verified using UV dye in the oil. THe dealer then tried replacing just the o-ring, but when that didn't work they ended up replacing the entire buss bar (all four connectors).
It sounds like your glow plug connector may be leaking.
Here's a picture of mine when it was leaking:
This leak was verified using UV dye in the oil. THe dealer then tried replacing just the o-ring, but when that didn't work they ended up replacing the entire buss bar (all four connectors).
It sounds like your glow plug connector may be leaking.
Elder User
Joined: Sep 2004
Posts: 821
Likes: 1
From: Nashville
I've never done it, but it's probably not too hard to replace the buss bar yourself. Maybe someone who's done it on this forum will confirm. Not sure how much the part is, but if it was anywhere close to the deductible, I would just let the dealer do it. The main thing is to be sure that the connector is what is leaking first. Otherwise you might be fixing the wrong thing.