Instructions

Please type in the fields below the relevant values and as you do that the result will be calculated and displayed.

It is best to measure your current shims with a micrometer and type in the measured value; this will increase accuracy. For instance, if one of your current shims has 240 written on it, but you measure it to be 2.3876 mm, it is best to type in 238.8 (note that I rounded to the fourth digit, 7, up, because the digit after it is larger than 5).

Another couple of examples. Another shim is marked 240, but I measure it with the micrometer to be 2.37998 mm. I type in 238. Another one is marked 245, but I measure it to be 2.44854 mm. I then type in 244.8.

  1. Desired valve clearance: Intake Exhaust:
  2. Size of currently used shims
    Intake:
    Exhaust:

  3. Measured clearance of currently used shims (millimeters inches)
    Intake:
    Exhaust:

  4. According to the data above, the following new shim sizes are recommended
    Intake:
    Exhaust:

  5. If new shims of the following sizes are installed
    Intake
    Exhaust:

  6. Then the new valve clearances in millimeters are
    Intake:
    Exhaust:

  7. And the new valve clearances in inches are
    Intake:
    Exhaust:

Updated shim size calculator can be found at: http://www.cs.toronto.edu/~relu/tools/shimcalc.html

Feedback and/or feature requestes are appreciated and can be sent to ohmega[at]gmail.com

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