08-05-2023, 04:58 PM
I can't tell from the photograph, but some engines had 2 main bearings and some had 3.
If your engine has 2 main bearings the big end cap should be symmetrical around the fixing bolts; if 3 main bearings, the rods are offset to one side and slightly narrower (in fact it was same as 2-bearing rod, but a little cut off one side).
I wouldn't worry about a little surface rust, a wire brush can remove it, as long as there isn't other damage.
Cracks from the slot at the little end are a problem and to be avoided. If you don't have crack test kit look very carefully with a magnifying glass.
The other thing to avoid is any rod with cuts in the side of the shaft, sometimes people used to mark no's 1, 2, 3,4 by saw cuts in the side, it's a complete disaster...
If your engine has 2 main bearings the big end cap should be symmetrical around the fixing bolts; if 3 main bearings, the rods are offset to one side and slightly narrower (in fact it was same as 2-bearing rod, but a little cut off one side).
I wouldn't worry about a little surface rust, a wire brush can remove it, as long as there isn't other damage.
Cracks from the slot at the little end are a problem and to be avoided. If you don't have crack test kit look very carefully with a magnifying glass.
The other thing to avoid is any rod with cuts in the side of the shaft, sometimes people used to mark no's 1, 2, 3,4 by saw cuts in the side, it's a complete disaster...