SOHC.co.uk Forums > CB350/400
Main Bearing Shells proud of Crankcases
simco1964:
Hi Everyone,
In desperate need of advice, fitted new Main Bearing shells as per Markings, plastigage all and there all reading o,063+ and 1 which has the Black shell fitted is reading 0,076 (photo included), but what I have noticed is that all the shells are proud of the crankcases, is this right? (See photos).
Regards
Simon
royhall:
No not right they should be level with the castings. You do appear to have a fair bit of muck around the crank area, are you sure the castings are totally clean under the shells, and the casings haven't been painted under the shells. You also appear to have a very rough crank journal in the Plastigauge photo.
simco1964:
Hi Roy,
The crankcases i'm sure are clear of any paint etc.
Have double check crankcases and their definitely clean!! I didn't know whether they had to be slightly proud for the jointing compound? plus i don't know whether they compress slightly into the casing when I torque the bolts up? as for the journal I don't know what's good/bad,can't feel any grooves/ridges with finger nail, it is quite a close up photo with the sunlight on it, don't know whether thats making it look worse than it is.
Whats the best way forward?
Regards
Simon
royhall:
Your probably best taking some clear photo's of your crankshaft in good light, and posting them on here. We will know better then. Where did you buy your shells from?
simco1964:
Hi Roy,
Bearing Shells have came CSMNL, will take some more photo's of Crank and the casings without the shells in, so you can see the condition, many thanks for all the help so far!
Regards
Simon
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