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02-05-2011, 09:09 PM
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#1 |
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Registered User
Join Date: Oct 2007
Location: Spanaway
Posts: 8,451
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Crank Bolt size.
I need to know the "socket" size for a front crank bolt for a Big block and small block chevy, i beleve the small block is 9/16 by memory but could be wrong, Thanks!
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Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's |
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02-05-2011, 10:33 PM
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#2 |
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Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: Crank Bolt size.
SBC takes a 5/8" socket, BBC takes a 15/16" socket.
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02-05-2011, 11:11 PM
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#3 | |
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Registered User
Join Date: Oct 2007
Location: Spanaway
Posts: 8,451
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Re: Crank Bolt size.
Quote:
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Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's |
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02-06-2011, 12:47 AM
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#4 |
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60-66 Nut
  Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
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Re: Crank Bolt size.
Ummmm I would say a BBC uses a 3/4" socket since it is a 1/2" bolt. Maybe 13/16" at the most......it's been a while since I've had a BB balancer bolt out.
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02-06-2011, 04:03 AM
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#5 |
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Registered User
Join Date: Oct 2007
Location: Spanaway
Posts: 8,451
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Re: Crank Bolt size.
Ok thanks, i just don't want to pack the whole set..
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Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's |
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02-06-2011, 09:29 AM
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#6 |
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Registered User
Join Date: Jun 2010
Location: Upland Ca
Posts: 4,139
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Re: Crank Bolt size.
Also keep in mind after market, such as ARP or Moroso, are different sizes.
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
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02-06-2011, 05:25 PM
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#7 |
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yes, i do
Join Date: Jun 2007
Location: Spokane, wa
Posts: 2,734
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Re: Crank Bolt size.
at least you weren't trying to figure out the shank size and thread pitch. its quite an odd ball with shank size and pitch
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ERROR 404....... SNAPPY COMEBACK NOT FOUND  _______________________________________________________________________________________________ -60 Chevy C10, dead 350/good th350 combo, sitting on a 76 c10 blazer frame, built from 11 different vehicles "the abomination" -07 gmt900 silverado 1500 lt xcab z71, granite blue -81 suzuki gs650g "shelah"- current project -81 kz1000m1 csr "sarge" -next project (just beautification) -07 kawasaki vulcan classic vn900 |
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02-06-2011, 06:53 PM
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#8 | |
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Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: Crank Bolt size.
Quote:
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02-07-2011, 12:34 AM
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#9 | |
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60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
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Re: Crank Bolt size.
That could be if someone stripped out the original threads. I just went out to my Suburban and checked.....3/4" socket fits.
Quote:
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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02-07-2011, 12:36 AM
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#10 |
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Registered User
Join Date: Oct 2007
Location: Spanaway
Posts: 8,451
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Re: Crank Bolt size.
Or different cranks, stock and aftermarket? Its no problem anymore guys, thanks for the help!
__________________
Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's |
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09-29-2018, 06:37 PM
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#11 |
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Registered User
Join Date: Jul 2018
Location: Corona, CA
Posts: 13
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Re: Crank Bolt size.
Hi All,
Do any of you know the thread size of the bolts that are used on the actual crank where it connects to the flexplate on a 402BBC? Thanks in advance.
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70 CST C20 |
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09-29-2018, 11:52 PM
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#12 |
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60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
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Re: Crank Bolt size.
They are 7/16"-20. Just be sure you don't use bolts for a flywheel as they are too long and will ruin your block if you run it that way.
__________________
Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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09-30-2018, 12:05 AM
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#13 |
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Account Suspended
Join Date: Aug 2018
Location: GBR !!
Posts: 144
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Re: Crank Bolt size.
Flexplate bolts are shorter than the "flywheel" (manual trans) bolts, they both are the same size but the flexplate bolts are shorter, the longer bolts if used on a flexplate will come into contact of the block and rear main cap causing issues you do not want.
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