From: Bill & Bonnie Prestin (bprestin@chartermi.net)
Date: Sat Jun 28 2003 - 20:49:14 PDT
Greg, Here are the factors I can think of that may cause oil to leak from
the exhaust.
1) the engine may have been left running at idle for long periods of time.
This would cause oil & unburned diesel fuel to accumulate in the exhaust and
possibly leak from the manifold.
2)broken rings or scored cylinders that allow oil to blow-by into the
cylinder.
3)a leaking turbo shaft oil seal.
I would suspect # 3. I run large stationary Caterpillar engines with a dual
turbo system and have seen this actually happen. Luckily my engines have an
emergency stop button I could press and run. Beware! if the seal blows out
completely and allows oil into the cold side of the turbo, you could have a
run-away engine. Not a pleasant thought.
The Turbo is a pretty easy fix, Good luck
Bill,
Birch Run,
Michigan
----- Original Message -----
From: "Greg" <czechsix@cox.net>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Thursday, June 26, 2003 1:34 PM
Subject: [MV] Deuce oil leaks....
> Hi all,
>
> I have a couple of questions for the experienced multifuel people out
there.
> This is a new truck for me, and as I'm going through it and
> tightening/replacing things, one of the things I noted was this leak from
> the #3 and #4 exhaust manifold ports. It's also enough that it's traveling
> through the exhaust side of the turbo, and making its way out the clamp,
in
> a few drips.
>
> Not firing in these cylinders? Bad blow-by? Shot rings? Just a crappy
> manifold gasket? If it was a gas engine I'd say bad rings and blow-by, but
> with this Diesel engine, could it be just a bad manifold gasket and
regular
> exhaust + a bad seal on the turbo/exhaust pipe interface?
>
> There doesn't seem to be any pressure coming out of the breather tube
> though....or very light pressure at the most. Seems like that should be
> normal? Engine runs smoothly, has plenty of power, and doesn't seem to
eat
> oil.
>
> Not being an experienced deuce person - and thinking that #3 and #4 might
> have bad blow-by, would anyone that wants take a look at these pics and
tell
> me what you think?
>
> (btw, for those of you that are dialup, all of these are small .jpgs -
about
> 60K)
>
> General view of the problem area:
> http://members.cox.net/czechsix//M35/OLbig.jpg
>
> Close in of the bottom of the manifold:
> http://members.cox.net/czechsix//M35/OL4man.jpg
>
> Bottom view of the turbo clamp (oil drip on the bottom of the clamp):
> http://members.cox.net/czechsix//M35/OLturbo.jpg
>
> Spray pattern on the top of the starter:
> http://members.cox.net/czechsix//M35/OLstart.jpg
>
> LDT 465 1-D, straight from the Marines. It's running Delo 400 15W/40, new
> filters.
>
> Thanks in advance...
> Greg
> Vista, CA
>
>
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