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Author
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Topic: Help! Cause for worry?? Pics....
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Dave_C
Gearhead Posts: 968
From: Gadsden, Al
Registered: Aug 99
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posted 12-02-2002 07:07 PM
   
Today I noticed a hairline crack in the lifter valley of my 557. It's in an area where I would think there isn't too much stress, but I want to be certain it's ok. It looks like it may have been there for a while. Notice the rust on the crack where it dips down into the hole on the close-up pic. What you see is it on the crack. It stops. Doesn't even go all the way through to the bottom of the hole.BTW, I have seen some blocks where these holes look like they were made with a hammer. Really jagged. Buddy of mine has hundreds of passes on a jagged hole block (low 11's). I would hate to have to toss this block. It's a C8, filled with hardblock, has bushed lifter bores and an Engine Systems 4 bolt conversion. Someone please tell me I'm ok!
  Later,
David Cole
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67coupe
Gearhead Posts: 488
From: dallas NC usa
Registered: Nov 2000
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posted 12-02-2002 07:58 PM
dont hold me to this but id think drilling a tiny hole to stop it from spreading would be the safest thing to do  good luck on whatever u do------------------
Josh
67 coupe with 351c
8.41 in the 1/8
1.90 60'
at 82.03 mph
94 Explorer
30 model A currently rustbucket
in process 67 convt with efi 5.0 and t5
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Moneymaker
Administrator Posts: 25883
From: Lyons, IL, USA
Registered: May 99
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posted 12-02-2002 09:20 PM
I'd do something for sure as it's on it's way to the lifter bore and that will eventually lead to catastrophy with a roller cam. There is a HD epoxy product that is green that works wonders on cast iron.  ------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
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clevelandstyle
Gearhead Posts: 1035
From: Connersville, IN
Registered: Jul 2001
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posted 12-02-2002 09:47 PM
It looks like the crack is horse shoe shaped and heading back to the big hole. It's hard to tell.  If it is infact heading back to the hole, I think I would gently persuade that peice to break away. It's a gamble, though! So, don't take my advice. ------------------
Ben
Grabber Green '70 Mach I 351C 4V
Robbin Egg Blue '79 Fairmont 351C 4V
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Dave_C
Gearhead Posts: 968
From: Gadsden, Al
Registered: Aug 99
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posted 12-02-2002 10:22 PM
I *think* I may be ok. Upon closer inspection it appears to be a natural casting flaw. I used a small dental mirror (my $3200 souvenir from my kid's braces LOL). The mirror along with a bright light let me see it from the underside. No evidence of any impact. No water or oil passage close by. There is a casting parting line on the underside about 3/8" from it off to one side.The crack does not appear to go all the way though. I'll drill it be sure though. I have seen virgin blocks that had a whole chunk missing in that area. In the pics it looks like the crack spreads into large U shape, but I think that's just an optical illusion. It disappears under a bright light. Later,
David Cole
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