Gene
In my experience Most MG Cams have no markings at all
except the168553 (or later number AAA3096) introduced
after TD2/24116.
The cams do wear in use and its is about imposible to
establish what an older cam is by measuring it,
Ive set up a number with dial gauges, timing discs etc
and always got most inconsistent readings from different
lobes! And never anything resembling the MG Specifications!
However the basic difference between a 19 thou and a
12 thou clearance cam can be got
A way to check which cam you have (assuming an original
Morris/MG one is there) is as follows:-
How to determine which cam is fitted --
(See Octagon CC Bull Sept 97) --
1 Remove the plugs so the engine turns easily.
2 Turn the crank until No 1 inlet (2nd from front) is fully
openAt this point No 4 Inlet (7th from front) cam
follower will be on the heel of the cam lobe (this is as
you would adjust the rocker clearances)
3 Set the clearance of No 7 valve to 0.012.
4 Mark the rear flange of the flywheel pulley 9mm to the
right of the TDC mark (=11 degrees), and another mark
11 mm to the left of the TDC mark (=5 degrees).
5 Now turn the engine so that the pushrod of the No. 4
inlet valve just nips up, and examine the position of the
pully relative to the TDC pointer on the timinhg chain cover.
6 A 0.012 cam will be on the 5 degree mark, a 0.019
on the 11 degree mark.
Regards
Clive
====================================
----- Original Message -----
From: "Gene Gillam" <anngene@bellsouth.net>
> Sorry for all these questions - but, how do you identify a cam? I just
> pulled the one from the XPJM and can only find 3 identifiable numbers -
> 077.
>
> Can that be traced/tracked to something?
/// unsubscribe/change address requests to majordomo@autox.team.net or try
/// http://www.team.net/mailman/listinfo
/// Archives at http://www.team.net/archive/mg-t
|