Why IS my 5.9l just burning oil?

[Peter Barnowski]

Why is my Cummins 5. 9l burning oil while driving?

 

[goodguys75]

bad rings... I think you have to be a little more specific... . Im sure lots of people will help soon...

 

[Peter Barnowski]

Well its taking alot of oil.

 

[Wingate]

What modifications? Aftermarket parts/accessories? what type of oil/filter do you use? Do you perform the maintenance yourself or have it done?

 

[goodguys75]

Well its taking alot of oil.

like i said give some details... . way different answer if it is stock to running 600h. p

 

[Peter Barnowski]

It doesnt have any modifications. It runs great. It takes about 1 1/2 liters in 1000km.

We bought it not to long ago and had the trans repaired.

 

[Prairie Dog]

Just a note to the OP, it's usually frowned upon to post the same thread in multiple forums.

 

[S.Morris]

IF you bought it not to long ago and had transmission repaired is it safe to assume that you bought it broken and when you finally got it on the road it is using this amount of oil?



We need more factual information in ONE thread to try and troubleshoot.

 

[Peter Barnowski]

Well we bought it and found out that the trans is broken. We brought it back to him and he gave us some money back. So we drove it and noticed it ius burning alot of oil. So assuming that it was because of the trans problem we drove it all the way from ontario back to our place manitoba. We got the trans fixed in fargo and drove it home and it still burned alot of oil. We have a 2000 Dodge RAm Cummins that we have used for pulling things from the states and it didnt burn oil.

 

[HBarlow]

You're not providing the type of information anyone would need to help you.

If you recently bought a high mileage '03 with a transmission that failed before you got it home and you're seeing high oil consumption I'll offer the guess that you bought a truck that had been neglected, abused, has been previously modified, or some combination of the three.

Worn piston rings, leaking valve guide seals or valve guides, are typical causes.

Many things can contribute to that situation including inadequate maintenance, use of cheap oil or oil of the wrong grades, cheap non-approved oil filters, an aftermarket air filter that allowed dirt and grit intrusion, or magic black boxes that modified fueling, fuel timing, etc.

If I had only one guess I would guess a previous owner was using an aftermarket air filter that poorly filtered incoming air.

An engine rebuild may be in your future.

Sorry for the bad news.

 

[Peter Barnowski]

Thats actually 177 712 miles on it and we got some money back.

 

[Peter Barnowski]

It Is coming from the top somewhere

 

[Peter Barnowski]

And its coming to the bottom

 

[Peter Barnowski]

What kind of oil is better to use on a cummins?

 

[sag2]

First of all pull an intake hose after the turbo and tell us what you see. Is there any oil in the hose? How about dirt? Wipe a clean finger inside one of the intercooler boots. What do you see, nothing, oil, or dirt residue?

If there is oil in the intake system you may just have a turbo seal leaking. Get it repaired right away before you have a run away. If no oil, and you find evidence of dirt, you are dusted, and at minimum you are looking at rings, more likely pistons, rings or a short block. Or you can just continue to add oil.

 

[B.G. Smith]

Has the oil and filter been changed since you have owned the truck? If not, some new oil and a filter might help. Worst thing you can do with an engine that is burning oil is stop changing and just add cheap oil. Shell Rotella 15W-40 or RPM Delo in same weight are two popular oils, oil has to be speceific for diesel engine. bg

 

[rbattelle]

Are you absolutely certain it's burning the oil and not leaking it? Does the exhaust stream have a light blue tint to it, and a big black residue coating the back side of the truck where the exhaust exits?

Is the underside of the truck coated in oil? I'm wondering if the transmission work might have damaged the rear main seal.

-Ryan