Hello all
impretty new here, but i have searched around for answers beforehand. let me start by talking about the build i bought myself into. its a 97 gsx in about as many pieces as you can think of. anyway, it has a 6 bolt block and crank, but 7 bolt eagle rods and 22mm pin pistons. i have read that the rod journal width on the 6 bolt is slightly wider than the 7 bolt, which i believe may have let to the engine spinning the #1 rod bearing.i have read about people using 6 bolt cranks in 7 bolt blocks but since i have an extra good 7 bolt crank laying around my question is can i use a 7 bolt crank with 7 bolt rods and pistons in a 6 bolt block? thank you

No.

Without some farely extensive machine work it's not happening. The rear main seal area is also vastly different.

Are you sure the rods aren't 6 bolt rods drilled for a 22mm pin? There would be sizeable rod side play visible to the naked eye with 7 bolt rods on a 6 bolt crank.

the rods are eagle CRS-5900-MBA, which a rep told me are for the 22mm 7 bolt

i have never seen the rotating assembly put together

I guess the OP just has a 6 bolt swap. 5900MBA is for 6 bolt.

I am getting a pop corn.

DSMPT said:

I guess the OP just has a 6 bolt swap. 5900MBA is for 6 bolt.

Click to expand...

Indeed it seems so. In that case I'd say poor clearances or something dirty was the cause.

@Cory045 do you have any pictures of this setup and said spun bearing?

DSMPT said:

I guess the OP just has a 6 bolt swap. 5900MBA is for 6 bolt.

Click to expand...

This is from eagle, so that's why I assumed it was for a 7 bolt

Cory045 said:

This is from eagle, so that's why I assumed it was for a 7 bolt

Click to expand...

I think the rep got confused or just a mistake.
See below.

that is really weird. the p/n is MA3D but the identifying marks are MBA

With some reason, manufacturers renew part numbers sometimes. Like K1 Technologies now have two part numbers on their products, old number and new number. Some years back they renewed it.