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T-Series & Prewar Forum

XPAG CAMS AND TIMING

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crankjournal Avatar
crankjournal Len Fanelli
Yonkers, NY, USA   USA
Bill I do not have a crowned lifter to measure with a straight edge if is crowned or not, however can a .0003" -.0006" convex, or crowned lifter be determined with a straight edge?
Best
Len

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plus4moggie Tom Lange
Bar Harbor, ME, USA   USA
The very best way to see if a lifter is crowned is to hold it against another lifter - if they sit perfectly squarely, they are flat; if they rock slightly, they are crowned. It's VERY hard to recognize a crown with a straight-edge.

Remember to also have the cam ground about .001" on one side of the lobe (like Crane) to work with the crowned lifter.

Tom Lange
MGT Repair

TD4834 Avatar
TD4834 Bill Chasser
Sacramento, CA, USA   USA
1950 MG TD
1951 MG TD MkII
With a straight edge and a light source you should see daylight between the two of it is a modern design. You would need two new lifters to confirm Toms method. The old design lifter then acts as the straight edge. But if the lifters have been run it may be a moot point if any wear is present



Bill Chasser
TD-4834
TD/c-8151
TD/c-16920
TD-19408
TD-24060

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crankjournal Avatar
crankjournal Len Fanelli
Yonkers, NY, USA   USA
Tom, Crane Cams taper for MG T type cams is.0006" . Some Crane Cams have as little as .00025" taper.
Best
Len

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