Stop engine light

Piston cooling nozzle failure? Didn’t know that would throw a code. I would not drive until properly diagnosed. That nozzle fails, and you keep driving, your looking at an in frame.

 

I had that happen to me on a Cummins. Did the rod and main bearings and the tech knocked it off and didn't say anything about it. Got about 70 miles down the road and got a high crank case pressure code. Sad thing is had the work done at Cummins. Good thing is they backed it.

 

He busted off one of the cooling nozzles? Must have really been banging around under there to do that. Just to note, on the Cummins they have an upgraded cooling nozzle, best to swap those out when doing the rods and mains, not that difficult to replace.

On edit: Just to note, these cooling nozzles are sometimes a mix of plastic and steel, with age and heat they do fail. So not always the mechanic. If you are getting in to the lower end, if possible, it is best to replace the cooling nozzles. They are located at the base of the cylinders, and shoot oil into the piston and cylinder from inside the block cooling the pistons. There are six of them and they use one bolt to attach.

 

You are absolutely correct. When we dropped the pan again you could see the marks on the oil jet from a hammer, with the jet cracked and the head deformed. The mechanic did admit that when he was tapping the bearing in the hammer slipped, but he didn't think it did any damage..... Really!?!? At any rate they did stand behind it and replaced the piston and liner. I bought the rest and had an in frame done for $3 K since they already covered most of the labor lol