60 series excessive blowby

dirtcurt

Active member
I have a 11.1 60 series in a tandem Kenworth dump with an allison automatic. Truck runs drives and handles a load very well. For the most part it does not use any oil. The problem I am having is excessive blowby out the crankcase vent. Since I am not lacking power or using oil is there anything else that could be causing this besides wore out rings? Just seeing if there are any other ideas out there or if we should just inframe it this winter and be done with it. Unknown engine history.
 

Shimmy1

New member
Detroits smoke out the breather. It's a fact of life. If it's not burning oil and pulls good, why go back inside.
 

Quasimoto

New member
I know it's a bit of a stretch, but a bad compressor could blow into crankcase. And Cummins has us check turbo's for blow by into crankcase
 
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