3340 blow-by

[ivydale]

working on a 3340 for a friend of mine,a lot of blow-by coming out of crankcase tube,when i crack number 3 fuel line from injector no change in engine rpm or sound ,unlike the other 2 injectors.Put another injector in and same exact thing.Any help would be greatly appreciated.

 

[dave_peters]

Broken piston ring on No 3

 

[ivydale]

Thanks Dave,thats what i was afraid of,any hints u can give as to replace the sleeve if need be?

 

[sb]

hi when you have rocker cover of check push rod did not jump out we had a 8145 that did . when it jumped out it bent the push rod your be lucky if thats all that is wrong

 

[dave_peters]

I'm sorry but I have to say I have never worked on a 3340, my sole experience of this model is a days silage mowing !!
However if experience of a 7245 is anything to go by, then remove the relevant head and see if there is any significant bore damage, hopefully there won't be since if it hasn't been used too much when poorly then there would have been no tension on the ring to cause damage, but you must be prepared for significant piston and bore damage.
liners are conventional wet , are usually not too hard to remove, and make sure the piston/liner kit includes the sealing rings that are around the liners in the block. Good luck !