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Is This Block Still Good?

steeldawg_69

By steeldawg_69,
in Engines & Forced Induction

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steeldawg_69 Contributor

steeldawg_69

Posted
Posted

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.

post-26402-1263097203_thumb.jpg

#6

post-26402-1263097412_thumb.jpg

#5

post-26402-1263097562_thumb.jpg

Center

post-26402-1263097739_thumb.jpg

#3

post-26402-1263097870_thumb.jpg

#2

post-26402-1263098021_thumb.jpg

#1

post-26402-1263098126_thumb.jpg

I hope these pictures help, thanks again guys.

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steeldawg_69 Contributor

steeldawg_69

Posted
  • Author
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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 Rising Star

proengines

Posted
Posted
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.

brother_david Rising Star

brother_david

Posted
Posted

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 :rolleyes:

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