Hey guys, looking for input as to what wrecks(wears or breaks) piston rings in these engines.

If an injector goes bad, will it wash the cylinder walls and wreck the rings? Is that a heat thing? Friction?

Dust/dirt obviously would wear the rings & cylinder.

Over heating, as in EGT's. Can this happen on a stock engine while towing, or is this a chip-only scenario?

Faulty rings?

This is my second engine with blowby in 120,000miles(replaced the last one with a 45000mile used one. I'm going to rebuild, but would really like to get a few miles out of this one!

Any thoughts?

PS, if I send the injectors in for testing, is the answer definitive? I've heard of a guy who sent his in, they said they were good, and turned out he had to replace them? Thanks.

 

i've only had 2 go bad in less then 150k. once was injectors going bad and then dropping a valve seat from egt's. the other was when the turbo took a dump and added metal to the cylinder wall. i would say wash from a bad inj and high egt's would be the major causes

 

Why do the EGT's go up when an injector 'goes'?

 

More fuel with the same amount of air.

MikeyB

 

Ether is the rings worst enemy. Very sudden and severe pressure rise before top dead center damages the ring lands and breaks the rings. So many people, sooner or later, use ether. And when they do they use WAY too much. Just the slightest sniff is all it takes and I see guys just hose the intake, or worse yet, spray it in AFTER the engine starts.

Another is putting new rings on old pistons with higher than spec ring side clearance.

Another is putting new rings in without cutting the upper cylinder ridge.

 

How are you decieding it is blow by? Have you run a compression test? Is it using oil? Has it ever made oil? If you concerned about oil out the vent tube that is a cummins for ya. Never had one that didn't on a health motor.

 

So true. Either bad stuff. Being an operator have seen many overload by spraying too much and spraying into intake directly causing engine to almost lock up. I spray a wet spot near intake so engine pulls fumes from wet area and get enough fumes to keep it going.

 

It's blowby out of both the tube and the oil cap. It's certainly more than it should be, by a lot. Haven't done a compression test yet, I don't have an adapter for the tester yet.
I've never made oil with a leaky injector.

 

over 90% of ring wear is caused by using k&n or airaid filters another 5% is caused by running some other oiled filter. the remaining is usually caused by using non ci or cj oil or extended drain with out testing

 

You have proof on the k&n filter causing ring wear? Madhat runs an airraid,and he has had no problems with his rig. He is runnin some high H.P.

 

Do an oil analysis. If the silicon numbers are high it means there's an issue with the air filtration.

MikeyB

 

I agree if the silicon levels are high you have a dirt problem. Also if you hold a KN up to the light you will see a lot of holes that will allow dirt. I know they tell you that the oil will cause the dirt to stick but some of those holes will allow the dirt to go right through. I put a Banks sidewinder turbo and exhaust kit on a F--d years ago and it came with a KN I was not impressed I figured that it might keep out piano stools and bowling ***** but very little else.
Jim O

 

With mine, I was most worried about shopping carts and small children.

 

With it spewing out the oil filer cap and the compression is good it might be valve guides but i would think they would have failed with that many miles unless the truck opperated above 3k all the time.