Big end shells issue.
Started to install the pistons today.
Placed the left bank pistons in and proceeded to attach the rod end with new big end shell bearings. Same size 0.20 or something like that.
Made sure they were aligned correctly and proceeded to tighten them just so they the ends fit together (not tight).
BUT I can't turn the crank when the ends are on. Appears the bearings are too tight. I don't know, but I thought they were the correct ones.
I pressed them into the slots on the rods with ease and they aligned nicely with the ends.
the pistons slide in and out nicely without the ends on though or slightly loosened.
Old shells: 1.87-1.91 mm
New ones: 2.10 mm
Both are stamped with FM -20 (I took the old ones to the alfa supplier and they matched them)
But now looking closely visually there is quite a difference.
And I have found all the receipts, hey except for these!!! Murpheys law!
They weren't cheap either. grhhh
The old ones are in good shape (replaced 2.5 years ago), I might put the old ones back in but probably not a good idea.
They are easy to change also, even without removing pistons.
Looks like the 66625RA are the correct ones (and the old ones aren't but oversized) so I'll measure the cranks and get slightly smaller oversized shells, maybe even the standard size:
Some previous mechanic/owner put non Alfa ones in - oversized -20 but they measure the same as the Alfa standard bearings.
66625RA are for Alfa 1.7 engines which are the new ones I have.
I think the standard bearings will be the ones I need and not 0.20mm oversized. He must have put oversized ones in because he didn't have the correct bearings for Alfa!!!!!