They upgraded the block during production. Old counterbore block had studs spacer plate block had head bolts.
Later Bob
Which where the better engine?
I think Bob will agree that there isn,t too much difference in the engines as they are both the D342 but I liked the pacer plate engine as it seemed the liners didn,t eat away at the block if the liner height got out of wack like the regular block.I,m not saying the spacer plate doesn,t or won,t wear the block but was easier to repair. I have repaired dozens of both style blocks by using either thicker shims or Cat had inserts to machine the block and install if they were eat away too much esp. in the regular block.I also have fixed lots of them regular blocks that were not only eat away down in them but saw so many cracked so that,s were the special inserts came to use when you found one cracked and eat away.
😊 Thanks Guys for the advice,
Are the liners the same or are they different in the spacer plate engine. What about the other components.
I have bought them anyway so I hoe I get a good run out of them.
I have bought a back up machine incase I have reliability issues but on this forum I wouldn't like to mention the brand for fear of getting allot of shit hung on me.
Cheers