Copy of paperwork for tappet clearances

[briscoe]

It's been quite a few years and many hours since I verified tappet clearances. I used to have a sheet of paper where you wrote down each reading and it simplified the ordeal. I still have the tool to lift the cam shaft, etc. I just don't know what I did with the paper to record measurements.

[Harper]

Not sure what you're asking, brother. I just made a few columns on a blank sheet, upper, lower intake, upper lower exhaust...and wrote down the measured clearances as I checked each one.

[briscoe]

Paperwork

There was paperwork that came with the tool. Very convienent. Exhaust and Intake for each piston. Write down the numbers. No confusion. Very nice.

Thanks

[Harper]

Oh. Hmmm, that didn't come with my tool.

[duaneb]

I used this in an excel spreadsheet.

A = B + (C – 0.25 mm)
A : Correct thickness of shim for proper tappet
clearance (mm)
B : Thickness of original shim (mm)
C : Original tappet clearance (mm)

[Bloggsy]

This may help make things easier valve clearance20180303_11563648.pdf valve clearance 220180303_11574896.pdf

[artdf175]

duaneb has the formula correct for the intake
the exhaust side is (C-.32mm)

so the formula would work like this on intake:
s/b in range of .23-.27 mm
if reading came up .15 mm
C-.25 = .15-.25= -10 mm
original shim has #240 stamped on it
the thickness is 2.40 mm
2.40 - .10 = 2.30mm or ID# 230

since the clearance is tight in this example the new shim has to be thinner than the original to widen the gap to be in the middle of the tolerance range.
as suggested an excel spreadsheet makes the math easier

The only question I would pose: Is the clearance the same on all engines?
If you don’t have the service manual, you should find a copy
Art

[duaneb]

Sorry, I should have specified that the formula I used was for 2006 DF140 and according to the service manual the exhaust and intake clearances are the same for that engine.