Do L3450s have bad engines?

[SPYDERLK]

Larry,
You need a control. Any chance you can listen to another 3450 and decide for yourself if it's just typical noise or something that needs tending to?

-Jim

Love to. Ill keep my eye out for one everywhere I go. Any readers in Orange, Culpeper, Fredericksburg, Charlottesville?
larry

 

[Yankee Clipper]

Larry,

The Grand L 50 used a direct injection design combustion chamber which has more rattle or combustion noise than the indirect combustion chamber design.

I am not trying to talk you out of doing some checking but if the noise is similar to what was present before the overhaul, likely it is normal.

Cam ground pistons (oval when cold, round when hot - for different expansion rate at pin boss) were used on some series of engines a number of years ago, but they are not doing this presently.

As for sleeves, the bores are all "parent metal", "en bloc" or linerless - the early 2 cylinders (L200/210) used dry sleeves but the rest have not used sleeves.

Now you know...

 

[artfull dodger]

A failing injector will also make a horrible hammer racket as one cylinder is getting either to much fuel or a real poor spray pattern from the injector tip. I would look into having the injectors check by a certified diesel injector/pump rebuilder for proper spray pattern and "pop" pressure. The old B7100 I am looking at has pretty good blow by out the breather tube, but runs well and will last me for years running like that. Eventualy I will tear it down and rering it ect. But even running in that condition, it sounds just like the other "chery" B7100 with less that 800 hours on it, while the one I may be getting has 2100 hours on it. Cheers Mike

 

[SPYDERLK]

Larry,
As for sleeves, the bores are all "parent metal", "en bloc" or linerless - the early 2 cylinders (L200/210) used dry sleeves but the rest have not used sleeves.

Now you know...

The L3450 definitely has sleeves. Difficult to see and not everybody knows about them. Fortunately we ran into somebody that knew that engine was sleeved and argued us into taking a closer look. Even the Kubota dealer didnt know! How in the world can that fact escape a Kubota dealer.
larry

 

[SPYDERLK]

A failing injector will also make a horrible hammer racket as one cylinder is getting either to much fuel or a real poor spray pattern from the injector tip. I would look into having the injectors check by a certified diesel injector/pump rebuilder for proper spray pattern and "pop" pressure. Cheers Mike

Thanks. That sounds like a good move. Ill plan on that. The only thing that doesnt fit with that is the noise is still present with no fuel during turnoff coast down. Its not so bad now. I just dont want it to get worse!
larry

 

[IH3444]

The rear cylinders usually get the preheated water from the front cylinder, so they usually wear a bit more. Both cylinder and piston. I've seen this in numerous engines. Gas and diesel. The rear cylinder piston run hotter than the front cylinders. That with DI engine, more wear, more nosie in rear cylinders. My 1972 International BD154 engine is direct injection, and is much noiser that the 2005 New Holland TC48. Also it has much more wear due to high hours.