Complex sentence: In 1989 there was a redesign of the 2.5 to permit both it and the 2.2 to use a common cylinder block; this commonized block, the crankshaft, rods and pistons are completely different from the previous 2.5.
Split into simpler sentences: In 1989 there was a redesign of the 2.5 to permit both it and the 2.2 to use a common cylinder block. This so-called'common block', the crankshaft, rods and pistons are completely different from the previous 2.5.