[Mgs] MGB Question

Barney Gaylord barneymg at mgaguru.com
Fri Mar 3 00:25:41 MST 2017

The narrow groove near tail end of the camshaft is a snap ring 
groove.  The snap ring would secure a mechanical tach drive gear for 
the 3-main bearing engines pre-1964.  There should also be a 
longitudinal groove, in that area for a woodruff key.  Post 1963 
5-main bearing engines did not have the mechanical tach drive, so 
those parts are omitted.  Camshafts are otherwise all the same so one 
size fits all.

At 02:34 PM 3/2/2017 +0000, Jack Wheeler via Mgs wrote:
>I am in the process of rebuilding the engine in my 1971 MGB.  It has 
>been a month or so since I took it apart, and my memory is a little 
>fuzzy on exactly what went where, etc.
>On the back end of the camshaft, there is a groove around the cam, 
>about 1/4" from the end of the cam.  Can someone tell me if there is 
>a reason for this groove?  Does an 'O' Ring or something ;like that 
>go in the groove?  Is there anything else that goes on the back end 
>of the cam?  It looks like once the rear plate is in place, there 
>will be a fairly large hollow area around the back end of the 
>cam.  I assume that any oil accumulating in this hollow area will 
>eventually drain back to the sump.  Is there anything else that goes 
>into this hollow area?
>Thanks for any insight you can provide.
>Jack Wheeler

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