Engine Loosing Oil?

denick

We have an 86' F600 with a 8.2 liter Detroit Diesel engine.

We are having a problem with the engine blowing oil out somewhere near the top of the engine.

It happens sometimes, like a week or two apart. it varies in severity from a little to a gallon.

There is no loss of compression. there is no blow-by. there is no pressure in the breathers. The engine isn't burning oil. I can find no broken hoses or tubes.

we have changed the valve cover gaskets and the breathers.

Anyone have any IDEAS?

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Nick

"Every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving" Albert Einstein

mdshunk

What I can't figure out is how you can lose so much oil out of the top end, and not have any in the breather or air cleaner. It can't be due to unusual top end pressures in that case. You're looking for a genuine leak, and not something blowing out under pressure. Might pay you to have the engine steamed off and keep a close eye on it. That's always pinned it down for me.

jmic

Nick, How often do you have to add oil?

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Joe

jmic

Nick,
Does it have a JAKE ?

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Joe

Teetorbilt

You need to nail down the cause. There is nothing that any technician hates worse than an intermittant problem.

Maybe it short/long drives. Loads. Ambient temps. You have to look for a pattern.

My experience is limited to the 71 and 92 series used in yachts. Also obsolete.

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R&S Exteriors

Is it actually leaking up top or could it be blowing up there?

Have you checked the oil filter. I had an oil filter that was not on properly once and it would leak then stop leaking

denick

No Jake Brake.

Never had to really add oil, just oil changes.

The oil trail seems to be from the top down.

Cannot find a pattern.

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Nick

"Every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving" Albert Einstein

R&S Exteriors

How about the oil pressure sending unit or if it has emission through an emission line coming from valve cover or manifold?

mdshunk

I was thinking along those lines, sorta. Some of those had a balance tube that connected the back of both heads, too. We're just guessing, anyhow. Steam it off and look for where the fresh leak is.

denick

Oil pressure sending unit is at the very back side of the block and it doesn't seem to be the problem. Although We have not been able to find the leak.


Thanks for the aggressive thought guys.

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Nick

"Every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving" Albert Einstein

dayexco

seal out or going out on your turbo? they take oil from the pan to lubricate/cool the bearings. if the seal goes out, they'll suck oil right thru the engine.

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someday, i'll be as patient as Nick.

rino1494

If a seal is bad in the turbo then you'll blue smoke in the exhaust.

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Dave-Raleigh

Steam clean the engine off and pour a oil dye in the oil. The leak should show up prety easy then. Do a google search for 'oil dye' A good parts place might have it too.

jojo

does the turbo have an oil line going to it,,could be cracked or loose...

dayexco

denick, you must know by now....what was the verdict on this engine?

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someday, i'll be as patient as Nick.

denick

Unfortunately I haven't gotten to that truck yet. I replaced the rear-end in my van and did a complete brake job on our dump truck and all the other small stuff that has come up in the last 5 weeks. While trying to get some productive time in on jobs, estimating, billing (which my wife spent tonight letting me know how much I haven't gotten done in these departments.

I spent a lot of time trying to pull the wetlands job together.

I hope to start on it by the end of the week

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Nick

"Every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving" Albert Einstein

denick

Well I finally got time to work on that truck. I cleaned the top of the engine . I then ran the engine between 1800 to 2300 rpm for almost an hour. I kept checking. Nothing! I idled the engine down and went into the shop. I came back out and climbed up on the wheel to try and figure this out. There was a puddle up on the air intake.

There is a metal tube coming out the head that goes to the fuel pump. It is connected to the pump with a 3/4" rubber hose. through the tube and hose runs a rod that I think opens the rack for the injectors. Out of the hose was running a steady line of engine oil.

Next week off comes the valve cover to see what's going on.

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Nick

"Every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving" Albert Einstein

Excalibur

Hmmm.. a Detroit leaking oil... how interesting. With the old 71 and 92 series engines if it didn't leak oil then you knew that something was wrong. If your 8.2 is like its ancestors, it should be healthy as a horse!

Bob

Teetorbilt

Excalibur, in the marine industry they always painted them white. Makes all of the drips show up better.

Anybody know of a diesel that doesn't leak? I'm familiar with most.

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You can't solve you're problems with the same level of thinking that created the problems.

Albert Einstein

Double-A

Never had problems with the smaller Yanmars.

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