I took apart my TR3A engine last month and tossed the pistons in the
trash, expecting them to be 83mm. I causually compared one to a TR4
piston I had and realized that the 3 had 87mm pistons, so I rooted through
the can to recover them.
They're curious things. They have no manufacturer's name on them, they
have three rings, and the only provision for expansion that I see is a
series of small holes just below the oil ring. Can anyone help identify
them?
The big question is: should I reuse them? The engine has not run in 20
years. The plan would be to put some different liners in the block, bore
them out to fit the pistons, put some new rings on and go from there.
John Middlesworth
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