Inliners International Forums General Discussion Engines What I assumed was a 250 is only a 230.......

Long story short. After disassembling what I believed was a 250, after going over the casting numbers, in actuality it is a 230ci.
The block casting number is 3994257. Correct me if I am wrong, but didn’t they use this and other blocks for both the 230 & 250? If that is the case, the stroke and piston compression height are the only 2 variations?

Now my question, would It be easier to go out and look for a real 250 complete engine and start the process over or keep my existing block and just locate a re-grindable 250 crankshaft for my rebuild.

Just locate a 250 crank & new 250 pistons & you should be good to go. IIRC

MBHD

That was a idea I had, but does any company offer a crankshaft kit or sorts for a 250? Other option would be pull one out of a 250 at a local yard.

I believe PAW offers super stock crank kits.

I just heard of bad machine opperators in the past.
https://secure.pawengineparts.com/shoppingcart/ShowItem.cfm?itemid=63348&catid=872

http://www.pawengineparts.com/

MBHD

try NAPA they used to sell complete engine kits with reground cranks, also you might check advance and auto zone. No matter where you buy a kit from make sure you flush out all of the oil passages to make sure there are no steel shavings in them. I also like to run twisted pipe cleaners through them, they can be bought in long lengths ( about a foot) from Harbor Freight cheap.

Rather than trust the casting numbers, did you measure bore and stroke?
Same bore, stroke of 3.25" = 230, 3.53" = 250.
Also the 250 has dished pistons and the the 230 uses the 283 pistons with the notches.

Pete