Cracked main cap repair?
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Launching!
Joined: Nov 2001
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From: St. Louis
Cracked main cap repair? I'm assembling a 408 iron block that's going to be used with a blower and noticed that one of the main caps (front) has a hairline crack around where the side bolts would enter. My question is is there any way to repair this? I'm not sure if the main caps are powdered metal or iron, so if it can't be welded then I guess I'm screwed. Any suggestions? I know I could get the billet caps but if this is repairable then I'll just have my machine shop take care of it. Anyone know if they can just be replaced by another stock piece?
Last edited by phenyxTA; Jun 11, 2004 at 06:09 PM.
I would not repair this.
If the caps are steel you would need to weld and then stress relieve the piece.
If you are having the assembly machined there is no reason it cannot be replaced by another stock cap and then machined with the existing pieces.
If the caps are steel you would need to weld and then stress relieve the piece.
If you are having the assembly machined there is no reason it cannot be replaced by another stock cap and then machined with the existing pieces.
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Originally Posted by phenyxTA
I'm switching to studs so we plan on align honing it anyway.
Oh and the hair gel should give it some extra support.
Oh and the hair gel should give it some extra support.
A line hone is used to straighten or true misaligned main bearing bores.
I kept getting confused when others would say they had their block "aligned" honed and when I looked it up in an Automotive Machinist's book and I couldn't find it, only line hone and it seems to fit the description.
Is this the same thing that others are referring to when they say "align" hone?
