Block prep. instructions
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Junior User
Joined: Dec 2005
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Block prep. instructions
Check out this link http://sa-motorsports.com/blockdiy/blkdiy.pdf about block prep./polishing. How many of you put this much work into it? Is this something that should be done for an everyday driver or is it only if your gonna rev it's guts out? Specifically the part about rod buffing.
Posting Legend
Joined: Sep 2001
Posts: 30,255
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I remove all of the casting flash, stress riser, and parting lines but I don't polish everything. I do that on any engine I build. That article goes way to far in many areas but they are trying to show everything that CAN be done with their abrasive kit but not necessarily what SHOULD be done.
Fleet Owner
Joined: Sep 2005
Posts: 28,609
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From: Lake Tahoe, Nevada
Originally Posted by know_fear
According to the article, it sounds like the parting lines on the rods are the most important flaws to be removed. Would you agree?
Posting Legend
Joined: Sep 2001
Posts: 30,255
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I would agree, but I have seen a number of rods that failed because of other stress risers like improperly installed rod bolts. One of the reasons NOT to replace the rod bolts.
Last edited by Torque1st; Feb 20, 2006 at 01:32 AM.
Fleet Owner
Joined: Sep 2005
Posts: 28,609
Likes: 18
From: Lake Tahoe, Nevada
On the subject of rod bolts, I am a little leery because of having seen a couple of rod bolt failures. I was brought a Cadillac motor that was recently rebuilt by a very reputable mechanic and determined that a rod bolt had broken and decided that the bolt had been overtightened. I'm sure he did not do it, but had he taken a few seconds to measure the length or diameter he would have found it. I saw the same thing on an old ****** four which was beyond repair. That one was done by the owner. So if an engine has ever been apart, or may have been, I always scrutinize the rod bolts.
