.030 over 440 question
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.030 over 440 question

  1. #1
    Just Me snoc653's Avatar
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    Default .030 over 440 question

    My engine builder passed away last week and I just got my blocks back tonight. The 454 is good to go except he didn't get the cam bearings installed but my 440 block is bored exactly .030 over with no extra clearance at all. Apparently he waited until he was going to put the pistons in to finish hone and add the last little bit of clearance. To gain the .001 or .0015 extra for a marine block do you think a cyl. hone that goes on a drill will provide enough clearance or should I find another machine shop to finish the block that last little bit? I have to put cam bearings in the 440 as well but I was thinking I'd tackle those myself since I have more than one to do.
    So many projects, so little time

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  3. #2
    Some guy obnoxious001's Avatar
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    If you don't already have pistons, get some made that will work with the .030 bore. I use quite a few Racetec pistons and they can set them for your bore size if you are sure of it.

    I have not let a shop touch cam bearings in any of my blocks for who knows how long, but I bought a tool with solid mandrills rather than the ones with expanders. I don't know if one of the kits with all the different sizes with rubber on them will yield results as good as the one I have does, so if you are not experienced, you might want a shop to do it after you have cleaned the block.

  4. #3
    Just Me snoc653's Avatar
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    Quote Originally Posted by obnoxious001 View Post
    If you don't already have pistons, get some made that will work with the .030 bore. I use quite a few Racetec pistons and they can set them for your bore size if you are sure of it.

    I have not let a shop touch cam bearings in any of my blocks for who knows how long, but I bought a tool with solid mandrills rather than the ones with expanders. I don't know if one of the kits with all the different sizes with rubber on them will yield results as good as the one I have does, so if you are not experienced, you might want a shop to do it after you have cleaned the block.
    Both blocks are already tanked bored and were covered ready to put together. The BBC was to be picked up the day after he passed and the shop has been locked up every time I stopped by. I just found out he passed away today. I already have the 440 pistons with the rings on them. He was just going to finish the 454 block first. The 454 was all in the assembly area but apparently someone grabbed the rings and bearings by mistake when they picked up another engine. The widow and son are trying to track down who took them and get them back. I told them they had enough to worry about and if they can't find them don't worry. We can all chuckle that someone has a set of KB .080 over BBC rings that they won't be able to use on anything. It was pure luck that I found pistons for that block in the first place. I can get more rings. I feel so sorry for the them since people are coming out of the woodwork making all sorts of crazy claims. He was a handshake deal kind of guy so there is very little paperwork on anything and some people are just flat out trying to take advantage. Someone even tried to claim that some of the son's old racing parts were theirs. And while there are some things I don't think are quite right like the cast crank when I thought it was a forged crank, I don't want his family worrying over my stuff. I didn't see any other BBC cranks while we were looking for the rings, so it must be the right one. He had called KB to make sure the clearance was right for the 454.

    The big job will be getting two Big blocks out of my truck by myself. My hoist has mama's 2.2 hanging on it for her Camry and I'm not sure I can get it out past it. For tonight I WD40'd the heck out them and put trash bags over them. I'll tackle the bocks in the AM.
    So many projects, so little time

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