Hello all, so have a cat D262 turbo went out and lost 2 gallons of oil. Cat came out new turbo on. After that let machine warm up, went to take a a scoop and seemed soon as it built boost the engine tried to run away there over rev code and had to shut down with hand over the air filter. Let machine sit for a few days drug machine home and pushed into the shop nervous to start it again. Took hose off between turbo and intake found oil down in the turbo and a small amount on the air filter side. Started machine with hose off and blew oil out at first then seemed fine. Any ideas as of what to do now? View attachment IMG_2628.jpeg View attachment IMG_2624.jpeg
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Is the drain to the oil pan clear, or is the engine overfull and drain pipe air locked and wont go down. Or maybe the new turbo is blown. Did they prelube the new turbo before start up. and yes the motor will run wild if sucking straight oil into the air intake. Simon C
New turbo seems good no shaft play. I’ll check the drain tube. Not overfull on oil.
Could there be internal engine damage from turbo going out the first time casing this oil?
Is there a little plate that fits the top of the turbo oil inlet that is missing. Some turbo's have them and they control the amount of oil entering the turbo. Not sure if your's has one or not. Simon C
Don’t see a plate or anywhere for one. Pulled the egr cooler and found a bit of oil down in the intake.
If Cat put the turbo on then this runaway happened, shouldn’t they be checking this out?
I don't think it is coming from the engine as your picture shows the bottom of turbo full of oil. One thing is for sure, If you pull the exhaust manifold off and plug the turbo feed line and plug the turbo drain line, you can actually start the engine, ( very loud but not too bad ) and will see if oil is coming out of engine. There will be some residual oil as you did get some in the air intake that needs to burn. Think the turbo was no good or too much oil feeding it. Simon C
You would think…not that lucky
The picture I just uploaded is down in the intake. The first pictures are down in the turbo
If the turbo blew or flooded, it will fill the intake with oil most of the time. Simon C
Ok is there a way to “test” the new turbo
On the engine is about the only way. Problem is in the turbo or in the engine. If it was not prelubed it could of gotten blown right on start up. Was not there but have seen others fail before, cannot say. If lots of oil went into the air intake, it will take time to get it out and engine may try to run away again, unless if something has just happened to the fuel pump, which I doubt. Best to run the motor, ready to shut down to get oil out of air intake. And yes it will smoke lots but less if you plug in block heater to warm up pistons and burn the oil cleaner. Unless the dealer wants to deal with it, which I cannot say. Simon C
When I say to run the engine, I mean with turbo off and lines plugged. Simon C
Did you check the PCV system? It's plumbed into the intake pipe just before the turbo. If you were seeing oil in the intake with both the old turbo and the new turbo I would lean towards the PCV system pumping oil into the turbo inlet.
Yes, call Cat and tell them they possibly have a warranty issue on their hands.
Cat is of no help. So cleaned and reassembled. Started machine and let run for a little while getting these codes in the pictures. Maybe delete machine? Guessing as of now that’s just all oil oil from when the turbo went. View attachment IMG_2705.jpeg View attachment IMG_2706.jpeg
Probably has an active fault or there is a parameter not yet met to allow regen to occur. If you want to rule out the CCV system I don't see why you couldn't temporarily disconnect the CCV line from the intake pipe before the turbo and run it into a catch container. See if that is your source of oil. If the oil is getting pumped out of the CCV system perhaps there's an issue with the filter canister not draining oil back to the sump? When was the last time the CCV filter was replaced? IIRC the service interval on that is around 1500 hrs? Perhaps someone with access to the OMM can confirm.
Word to the wise, if the DPF is oil saturated I would highly advise not performing a regen if you don't want to see your machine ablaze. Ask me how I know this.