Go Back   The Ford Barn > General Discussion > Early V8 (1932-53)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 05-15-2018, 12:10 PM   #1
Fullfendered
Member
 
Fullfendered's Avatar
 
Join Date: May 2010
Location: Western New York
Posts: 93
Default Cracked blocks

Getting desperate, have taken 4 8BA blocks to machine shop, all four had cracks too deep to fix. There is a block with .080 bore on ebay within reasonable driving distance. My question is .080 too much? https://www.ebay.com/itm/Ford-Flat-H...Faa3~B&vxp=mtr

Thank you all for your responses.
Fullfendered is offline   Reply With Quote
Old 05-15-2018, 01:18 PM   #2
rotorwrench
Senior Member
 
rotorwrench's Avatar
 
Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 13,358
Default Re: Cracked blocks

The 8BA blocks can have core shifts like any of the other flatheads but any block with minimal corrosion and core shift can go out to 3 5/16" without any problems. I certainly wouldn't bore one that far until checking it with ultra-sonic testing for thickness just to be safe. That's 0.125" oversize. I personally would only bore it as far as it needed to go to clean it up but the possibility in there.

They may be able to even go farther than that but there is always more risk the farther they are bored. 3 3/8" is pushing them about as far as they can go.
rotorwrench is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 05-15-2018, 02:30 PM   #3
JWL
Senior Member
 
Join Date: May 2010
Location: Fitzgerald, Georgia
Posts: 2,160
Default Re: Cracked blocks

There are piston sets available with .083 oversize design so it might be that you can simply hone and use that block if all else is good.
JWL is offline   Reply With Quote
Old 05-15-2018, 04:50 PM   #4
James
Junior Member
 
Join Date: May 2010
Location: Massachusetts
Posts: 12
Default Re: Cracked blocks

Based on the receipt, the block has a fresh bore that should finish at .080 over, with a bit of honing, right? If so, the block is almost ready for rebuild at that oversize. Since there is an option to make an offer, I wouldn’t hesitate to start at $1000 if ALL ELSE checks out.
James is offline   Reply With Quote
Old 05-16-2018, 07:56 AM   #5
john in illinois
Senior Member
 
john in illinois's Avatar
 
Join Date: May 2010
Location: Illinois
Posts: 2,053
Default Re: Cracked blocks

I noticed it did not say they pressure tested it. I would want that done. imho

John
john in illinois is offline   Reply With Quote
Old 05-16-2018, 08:44 AM   #6
rotorwrench
Senior Member
 
rotorwrench's Avatar
 
Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 13,358
Default Re: Cracked blocks

Sponsored Links (Register now to hide all advertisements)
I would want a money back guarantee that it is usable on return of the undamaged block. If the seller hasn't been satisfied that it is usable then why should you be.
rotorwrench is offline   Reply With Quote
Old 05-16-2018, 08:42 PM   #7
Fullfendered
Member
 
Fullfendered's Avatar
 
Join Date: May 2010
Location: Western New York
Posts: 93
Default Re: Cracked blocks

Thank you one and all, definitely taking your advise into consideration.
Fullfendered is offline   Reply With Quote
Old 05-17-2018, 08:17 AM   #8
Bored&Stroked
Senior Member
 
Bored&Stroked's Avatar
 
Join Date: Jan 2011
Location: Central Ohio
Posts: 3,507
Default Re: Cracked blocks

It appears to be a good block - as long as the seller will guarantee that it passes another mag and pressure test, then I'd go for it. It has about $500 of work into it - so it really isn't an unfair price in the end.
Bored&Stroked is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 11:49 PM.