V3307 piston to bore clearance

[Bgblock427]

I have looked in the manual and measured everything and don't like that I am only getting .001 piston to wall clearance. being a avid automotive engine builder this seems very tight for a diesel engine.
I don't see in the manual what the clearance should be only see allowable limits for bore wear? The sleeves and pistons that we installed were a kit. What's every set the clearance to?

 

[North Idaho Wolfman]

Did you have the sleeves bored to size?
They do not come pre sized.
They are only semi finished.

 

[Bgblock427]

Did you have the sleeves bored to size?
They do not come pre sized.
They are only semi finished.

Yes the cylinders were honed, but being someone that checks all clearances when I assemble, I want to know what the minimum piston to bore is for this engine. I just looked at the manual again and I don't see a piston OD measurement stated. The bore is specified just not the piston. they are measuring in at .001

 

[North Idaho Wolfman]

Yes the cylinders were honed, but being someone that checks all clearances when I assemble, I want to know what the minimum piston to bore is for this engine. I just looked at the manual again and I don't see a piston OD measurement stated. The bore is specified just not the piston. they are measuring in at .001

I've never heard anyone honing those liners to size???
What size did you hone them to?
What size do the piston you have spec out at?

Yes I'm looking into the specs on piston size.

It would also help to know Exactly which V3307 your working on as there are several.

One note: This is a Ultra High compression engine @ 569psi every spec is super tight.

 

[Bgblock427]

I should have said the machine shop that installed them finish honed them. I was reading 3.700
engine is a 2006 v3307 from a M7040 tractor. 6S0389

 

[North Idaho Wolfman]

So your getting 3.700 on both the cylinder bore and the piston, give or take .001.

Take a ring and check the gap on the bore.

I have looked at 10 different WSM's for that engine class and oddly none spec out the cylinder size.

That engine is odd in that it has moly skirts so it is a very tight tolerance piston to begin with.

Looking at every other engine spec I have for Kubota engines the pistons spec at .003 under the cylinder.

I'll keep looking at different specs.