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Hi all, during the evaluating of this block to pair with a crank to decide destination of use, performance, normal use, "1000miles and die/discard"... I found this funny things in this block while measurement.
First - "almost weird" solution on position 4:
Second - "strange" measurement of bores (second is square):
1 - 63,22 - 63,205
2 - 67,00 - 66,99 (if you see well there is a straight mark almonst 10mm under the stud in the direction of the crank axle, it define a bulge in the aluminium)
3 - 63,19 - 63,21
4 - 63,21 - 63,19
5 - 63,20 - 63,215
Workshop manual say main bores are 63,657 - 63,676 mm...
Mmmmhhhh
If you do the reverse math you can find an average 1,625 mm bearing thickness...
Double mmmhhh
About crank.
Marked in red was regrounded/polished, ultrasonic cleaned and has (second is square):
1 - 59,95 - same
2 - 59,95 - same
3 - 59,96 - same
4 - 59,95 - same
5 - 59,96 - same
What do you will do with this?
Performance, normal use, "1000miles and die/discard"?
Thanks,
Next step will be the studs evaluation.
First - "almost weird" solution on position 4:




Second - "strange" measurement of bores (second is square):
1 - 63,22 - 63,205
2 - 67,00 - 66,99 (if you see well there is a straight mark almonst 10mm under the stud in the direction of the crank axle, it define a bulge in the aluminium)
3 - 63,19 - 63,21
4 - 63,21 - 63,19
5 - 63,20 - 63,215
Workshop manual say main bores are 63,657 - 63,676 mm...
Mmmmhhhh
If you do the reverse math you can find an average 1,625 mm bearing thickness...
Double mmmhhh
About crank.
Marked in red was regrounded/polished, ultrasonic cleaned and has (second is square):
1 - 59,95 - same
2 - 59,95 - same
3 - 59,96 - same
4 - 59,95 - same
5 - 59,96 - same


What do you will do with this?
Performance, normal use, "1000miles and die/discard"?
Thanks,
Next step will be the studs evaluation.