oil seepage head to block joint
 

oil seepage head to block joint

Started by bevans6, May 22, 2016, 07:59:38 AM

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bevans6

I have some small oil seepage at the front corner of one head, at the head to block joint.  It's light, but the oil attracts dirt so it gets grimy and you can see it.  Am I correct in assuming that is seepage past the oil passage O-ring between the head and block, and am I correct in assuming that I don't need to pull the engine out to pull the head to fix it instantly?

Brian
1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
Allison MT-647
Tatamagouche, Nova Scotia

thomasinnv

Sure it's not leaking somewhere else like the valve cover or blower, or governor and running down the deck of the block from above somewhere?
Some are called, some are sent, some just got up and went.

1998 MCI 102-DL3
Series 60 12.7/Alison B500
95% converted (they're never really done, are they?)

bevans6

Many cans of brake cleen are being sacrificed to to mission of finding the leak...  Today, the though was my starter motor is leaking.  Starter motors don't have oil in them.  The search continues.  I actually think the air box covers might be spraying (turbo engine) and putting a mist out that gets over everything.
1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
Allison MT-647
Tatamagouche, Nova Scotia

Dave5Cs

Brain mine leaks a little too and back by the air  compressor. When it gets messy I just spray it with the Purple stuff and spray it with my pressure washer. i turn it down from 3500 to 1500 and blast away. Cleans it right up for a few months. Never enough for dripping on the ground other than my air box drains and they are only a little after a good run.
Dave5Cs
"Perfect Frequency"1979 MCI MC5Cs 6V-71,644MT Allison.
2001 Jeep Cherokee Sport 60th Anniversary edition.
1998 Jeep TJ ,(Gone)
Somewhere in the USA fulltiming.

bevans6

It only leaks after a run.  there are a few other seeps, but I think if I find this one, it will make me happy.  It's a 10" spot on asphalt that stops dripping after a day.  Right under the starter motor.  Top of the engine, oddly, is completely dry.  Gasket sealer worked up there!  Keeps me busy, I guess.
1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
Allison MT-647
Tatamagouche, Nova Scotia

jmblake

Brian, I had the rear crank seal leak and it made the starter look like it was leaking oil ???
Jason

chessie4905

Clean it thoroughly and spray it with a talcum powder in a spray can. Some powder type deodorant sprays will work.
GMC h8h 649#028 (4905)
Pennsylvania-central

Scott & Heather

Up in the north, I can't imagine power washing my Detroit. It will never rust :)


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Scott & Heather
1984 MCI 9 6V92-turbo with 9 inch roof raise (SOLD)
1992 MCI 102C3 8v92-turbo with 8 inch roof raise CURRENT HOME
Click link for 900 photos of our 1st bus conversion:
https://goo.gl/photos/GVtNRniG2RBXPuXW9

Dave5Cs

Scott that's funny.

Sent from my SM-N920T using Tapatalk
"Perfect Frequency"1979 MCI MC5Cs 6V-71,644MT Allison.
2001 Jeep Cherokee Sport 60th Anniversary edition.
1998 Jeep TJ ,(Gone)
Somewhere in the USA fulltiming.

DoubleEagle

Finding leaks on a 2 cycle is like playing whack-a-mole; they keep coming up. I like the talcum powder idea, its good to know where they are even though we are not going to do anything to harm the anti-rust prevention program.
Walter
Dayton, Ohio
1975 Silvereagle Model 05, 8V71, 4 speed Spicer
1982 Eagle Model 10, 6V92, 5 speed Spicer
1984 Eagle Model 10, 6V92 w/Jacobs, Allison HT740
1994 Eagle Model 15-45, Series 60 w/Jacobs, HT746