Is This Block Still Good?

[steeldawg_69]

Need a little help here. Spun bearings on my RB26 motor and now gathering parts for the rebuild. Problem is this............my builder looked at the block and noticed there was crank walk with some damage on the edges of the block where the main bearings would sit. the thing is when we put the new main bearings in the block, the damaged edges do not affect the area where the new main bearings will sit, my question is this............should I discard the block or can it still work? I've tried taking some pictures to show the damage. Thanks guys.

Picture taken from rear of the block.

#6

#5

Center

#3

#2

#1

I hope these pictures help, thanks again guys.

[STATUS]

i would line bore it to make sure it is still true.

[steeldawg_69]

My guy was saying he did not want to line bore because he was afraid that it would probably cause the oil pump not to line up properly (not sure if I am quoting him well). Thanks much for your reply though, it means a lot to get help on this forum.

[proengines]

i would line bore it to make sure it is still true.

Ditto.

If you just buzz the burr off the edge and run a tunnel hone through it you shouldn't have any issues with pump alignment or tunnel size. The tunnels do pinch up across the parting face when they get heat into them. Doing a thrust bearing like that can cause a fair bit of heat so it's worth checking out.

[steeldawg_69]

Thanks a lot URAS and Greg, I'll show him the post you guys made and we'll take it from there. I really appreciate the time you guys took to read my post and advise me.

[our12]

Hi.

It looks like number 3 main webbing is cracked on both sides.

[steeldawg_69]

No, its not cracked its just how the picture was taken.

[steeldawg_69]

I was doing a search and found out that the reason the crank would walk like that would be due to the pressure plate. Would that be true?

[steeldawg_69]

Anyone?

[brother_david]

Ye i guess, it is putting pressure on the crank but i takes one hell of a pressure plate to be the single reason there's crankwalk, im guessing the engine has taken a beating and all combined with bad bearings the pressure plate has helped to cause this but not a pressure plate alone

[steeldawg_69]

Ok, my reason for asking is that I want to make sure I eliminate that threat while doing the rebuild. Thanks mate.