08-06-2022, 07:41 AM
So far as I am aware, the later three bearing shell bearing conrods do not fit a two bearing engine , as they are not as wide as the two bearing rods and there will be too much end float. If the movement is only slight and the bearing surfaces are in good condition, it has been known to file the caps to take up the slack.
I would suggest before going much further that you invest in some Plastigage and discover just how much clearance you have between the rods and the crank. Also, check the crank pins for any taper and ovality with a micrometer or a set of precision verniers. You will need ones that measure to 1/1000 the of an inch. The cheapo ones only measure to 1/100th.
Do you have a copy of Doug Woodrow's Austin Seven repair manual?
I would suggest before going much further that you invest in some Plastigage and discover just how much clearance you have between the rods and the crank. Also, check the crank pins for any taper and ovality with a micrometer or a set of precision verniers. You will need ones that measure to 1/1000 the of an inch. The cheapo ones only measure to 1/100th.
Do you have a copy of Doug Woodrow's Austin Seven repair manual?