Oil Pump Drive Support Bush

[Aussie Challenger]

I was checking an article on rebuilding my small block and it said that I have to use a special tool to size the bush once I have knocked it into place. I have always been told to just tap it with a drift and hammer into place, I have never replaced one before as the shafts have always been quite tight and not needing replacing. I can see how the tool works and why, similar to sizing K line valve guides, so is it necessary?   

  Thanks in advance.

   David

   Aussie Challenger

[burdar]

I had one where the oil pump drive was very tight in the bushing after it was installed.  I assume this is what they are talking about.  If the pump drive slides into the bushing without binding, then I think you should be ok. Someone with more experience should confirm this.

[Chryco Psycho]

usually once the bushing is installed the bushings is too tight for the drive to slide into it so the only choice is to burnish it open again

[Aussie Challenger]

Thanks to both of you for your quick response, C.P. I got that from the article so I suppose if I have to replace the bush, I do have a new one, I will have to address "burnishing" the bush. Either find a tool (make one, buy or borrow), it said not to ream out the bush as it will not hold properly in the block without burnishing.