To make a long story short. I had a machinist press together my 98 fc 501 crank. In doing so, the big end pin was offset and rubbed slightly on the main bearing and set the crank only .001 for clearance inside the main bearings. Took it back and finally he listen to me and for the clearances needed for flex, heat expansion and inner float for the main bearings and crank. Now big end pin offset in the opposite side by .010 and over pressed leaving me .008 between my conrod and inner wall inside the crank. Leaving me with .037 of play between the crank main bearings By pressing .010 back out will give me .027 or .7mm for the main bearings clearance in the cases, This will give .018 for the conrod and big end pin for oiling. The Question? Is that enough clearance .018 for oiling so I don't smoke the connecting rod and big end bearing. The math is there don't know about the oiling
Need a little help.
- Thread starter dustburner
- Start date
Joined Nov 2001
17K Posts | 774+
Ely, England
the rod needs 0.015"-0.18" float. you will then as you say, have 0.027" float for the crank against your mains.
this is fine if you have ball mains. if you have roller mains it is marginal if not too little. you aren't clear whether you have ball or roller mains.
oiling is NOT the problem here.
regards
Taffy
this is fine if you have ball mains. if you have roller mains it is marginal if not too little. you aren't clear whether you have ball or roller mains.
oiling is NOT the problem here.
regards
Taffy
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