piston ring size for 1600

[sevenmilebridge]

I was getting new rings for a 1600 thats ready to put back together found out that the ring size on this motor is the same as a 2000. top ring 2mm second 2.5mm oil 4mm. Question are the pistons in a 1600 the same size as a 2000

[david premo]

The pistons are the same size, skirt length and ring grove as well as crown are different. You can put U20 pistons in an R engine with zero modifications, you can not use R pistons in a U engine without modifications to the skirt of the piston. That said there are other pistons that are even better that use newer technologies.
Dave

[sevenmilebridge]

Thanks the 1600 has the slight dome pistons and are in great shape. The engine was blowing smoke real bad found out it had a broken oil ring. So while it was out why not rebuild should be back on the road again soon.

[david premo]

Be sure to check the top of the bores for “step” wear, it will destroy the top ring lands if there is any step at all!
Dave