bittenfleax

UPDATE! So I've double checked my measurements with plastigauge to be on the safe side. The readings I got on the plastigauge were matching up perfectly with my measurements! Below is a picture of the 1st lobe for clarification. I've also installed piston 1 - I checked the ring gaps (using TP rings) - they were in tolerance. I also checked the tolerance with plastigauge and the reading I got was the same as my measurements! 3 more to go now

That sorted it - I measured the bearings at the centre point using the ball bearing supplied with my micrometre and also re-measured the lobes as it was the first set I measured (so was more likely to be inaccurate) If anyone comes across this and is stick - I got the following after measuring the bearings properly: Location Lobe Size Gauge Tolerance Total Lobe U Shell L Shell Bore Tolerance STD Min STD Max Max Tol Main 1 21.988

Oh yeah, so that's what the ball is for in the micrometre set 😆😅 I will do your method tonight and review the results cheers man! I did install all the caps (torqued down as well), I just measured without the bearings to get the initial bore size. Then I just add the thickness of the bearings onto this. I then subtract this result from the lobe of the crank which gives me my tolerance - means I'm not scratching the surfaces of my bearings with a telescoping gauge!

Hi guys, I've measured the tolerances for my bearings and I have got the following values (I re-measured everything 7-10 times to make sure they're correct) Location Lobe Upper Shell Lower Shell Bore Tolerance STD Min STD Max Max Tol Main 1 46.988 1.956 1.961 51.038 0.133 0.016 0.048 0.8 Main 2 46.988 1.964 1.961 51.049