My manual says to measure the lobe height and outer diameter of the cam journals. I've done this using a very accurate micrometer I borrowed. The lobe heights are 36.3 mm. According to the manual, the tolerance is 35.79 to 35.84 with a service limit of 35.49. My cam journal outer diameter is 22.47 and it should be 21.97 to 21.99. Why are my measurements bigger than the ranges stated in the manual - and does it matter?