I've got measurements!

[Red Tech]

Because I am using a new supplier to our business, (Riley's Tractor Parts), and a new brand, (Absolute), I am measuring everything just to make sure that I don't have any problems.

I would appreciate if you could give me your opinions on a couple of my measurements.

This is in an 886 with a D-358.

The bores in the sleeves are all .002-.003 larger than the original bore spec of 3.875 and the maximum out-of-round is .0007.

The sleeve standout above the block is .002; the manual calls for .003-.005.

The ring gaps on the top two rings are .019, which is within the specification of .014-.022

The ring gap on the oil ring is .018, which is slightly outside the specification of .010-.016.

The piston pin diameter is perfect; however, the length of all of the pins is about .015 shorter than the specs so the clearance between the snap ring and the pin is not within the specs of .004-.032.  It is anywhere from .003 to .019 past the top spec of .032.  All but one of the pins are within .010, with only one being .019 above the top spec.  Because the .004-.032 is a rather wide range, I'm wondering if I should be concerned about the additional clearance.

As I proceed, I will measure additional areas, but for now, I would appreciate your opinions as to whether these measurements are within acceptable ranges.

Thank you,

Red Tech

 

 

[Cdfarabaugh]

2 hours ago, Red Tech said:

Because I am using a new supplier to our business, (Riley's Tractor Parts), and a new brand, (Absolute), I am measuring everything just to make sure that I don't have any problems.

I would appreciate if you could give me your opinions on a couple of my measurements.

This is in an 886 with a D-358.

The bores in the sleeves are all .002-.003 larger than the original bore spec of 3.875 and the maximum out-of-round is .0007.

The sleeve standout above the block is .002; the manual calls for .003-.005.

The ring gaps on the top two rings are .019, which is within the specification of .014-.022

The ring gap on the oil ring is .018, which is slightly outside the specification of .010-.016.

The piston pin diameter is perfect; however, the length of all of the pins is about .015 shorter than the specs so the clearance between the snap ring and the pin is not within the specs of .004-.032.  It is anywhere from .003 to .019 past the top spec of .032.  All but one of the pins are within .010, with only one being .019 above the top spec.  Because the .004-.032 is a rather wide range, I'm wondering if I should be concerned about the additional clearance.

As I proceed, I will measure additional areas, but for now, I would appreciate your opinions as to whether these measurements are within acceptable ranges.

Thank you,

Red Tech

 

 

One measurement I dont regard much going by OE service info is original bore size and piston to cylinder clearance and original ring gaps.  Materials have changed greatly since the 1970s in pistons and rings so expansion and tolerances are different.  Out of round still applies.  Best to call manufacturer for their specs.  

That liner height concerns me a bit though.........although it's possible the counter bore may not be up to snuff at that age.  

[IHC_1470]

Two ways to go to bring sleeve height into specs. Install a shim if available or have the deck surfaced. 

[E160BHM]

11 hours ago, IHC_1470 said:

Two ways to go to bring sleeve height into specs. Install a shim if available or have the deck surfaced. 

Or have the counter bores deepened.  
Cat has tooling and parts to fix counterbores for most of their engines including shims to set liner height after cutting bores to clean them up as well as inserts to replace seats that are too far out of spec.  
Did IH or anyone aftermarket ever have anything like this?

Brian