M42club.com - Home of the BMW E30/E36 318i/iS

DISCUSSION => Engine + Driveline => Topic started by: KenC on January 04, 2010, 05:32:31 PM

Title: Crankshaft specs?
Post by: KenC on January 04, 2010, 05:32:31 PM

I'm going to yank my crankshaft soon. How do I check the bearing surfaces to make sure they're within their tolerances and don't need oversized bearings? I'm assuming just with calipers, bu I just want to get details and numbers.

Title: Crankshaft specs?
Post by: BlueBMW on January 04, 2010, 08:45:35 PM

In this post I put up some size specifications for an M42B18 (it was for a 95 318is)  If you want me to look up for a different car just let me know.

http://www.m42club.com/forums/showthread.php?t=10417

Although I've never done much engine building myself, when I built plastic injection molds I usually measured with micrometers for outside dimensions and a depth mic with a gauge pin for inside surfaces.  I'd think any sort of micrometer would be more accurate than calipers (though you can get pretty close with a good set of calipers)