5425 Tractor blowing oil out of exhaust

3049 Views 4 Replies 4 Participants Last post by Jdw1, Jun 20, 2021

Thepoorbloke

Discussion Starter · Jun 17, 2021

I need help diagnosing a problem on a 2005 John Deere 5425 Tractor. It is blowing a large amount of oil out of the exhaust pipe(described as raining oil). It shows no loss of power, and it eats oil. We've ruled out it being unspent fuel mixing with substances in the exhaust, since it shows no sign of an oil leak and it consumes so much. Next thought is bad piston rings, but that should(?) cause a loss in power, so that seems unlikely. I had someone suggest it could be the turbo leaking oil, and that makes sense to me.

My problem is the machine is in Congo, and I will be bringing the parts to fix it, so I need to be as sure as possible that I know what the problem is. There are people over there that can take a look, but they have very little time and very basic mechanic skills(its a Dr. who's busy running a hospital). If you have any suggestions, knowledge, basic tests we could run, I would really appreciate it.

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Tx Jim

· #2 · Jun 17, 2021

Welcome to GTT
How long since air filter element has been cleaned/changed? I agree failed turbo seals can cause increased oil consumption. How many hours are showing on speed/hour meter. Reman turbo is around $900

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Thepoorbloke

Discussion Starter · #3 · Jun 17, 2021

Tx Jim said:
Welcome to GTT
How long since air filter element has been cleaned/changed? I agree failed turbo seals can cause increased oil consumption. How many hours are showing on speed/hour meter. Reman turbo is around $900

Not positive, and at this point I can't get an answer until tomorrow, but I know the machine was used to run a generator as one of the main power sources for the hospital, so it's been very heavily used. Air filter probably has not been replaced or cleaned as frequently as it should(people here in the state don't do that enough, I'm assuming the overly busy Dr. in Africa doesn't).
Anything other info that might be relevant that I should ask him when we talk again?

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The Satch

· #4 · Jun 17, 2021

If the seals in the turbo have failed, the exhaust on the hot side of the turbo may be wet inside, is anyone there capable of pulling that pipe and looking? Turbo seals is what my mind jumped to as well.

They may also be able to see oil on the impeller wheel.

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Jdw1

· #5 · Jun 20, 2021

If the seals on the boost side (cold side) of that turbo would fail the engine would likely run away and blow itself up and you’d not have a way to stop it, it’s hard to speculate on the issues it has, by your statement on lack of maintenance it could be a couple of things, bad rings, bad turbo, ….. if you remove the turbo and the exhaust manifold is dry it’s more than likely the turbo. You’ll have to make the call after you look it over, it my need a complete rebuild!

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