The Ford Barn

Ol'school · 02-02-2018, 08:29 PM

Does anybody know what size and grade of bolts I should use on attaching the flywheel to the crank on my '57 TBird stick 292 Y Block?
Also the proper bolts to use for attaching the pressure plate? Do I use lock washers on the bolts?
Thanks

dmsfrr · 02-02-2018, 09:05 PM

Not sure what the specs are on the bolts, but make sure they don't end up too long.
If they go thru the crank flange more than 1 thread or so they can lock up against the rear of the block.

I semi-recently replaced the old engine in my project with a rebuilt 292. Used the same crank flange bolts (w/ spacer ring) from the old engine to hold the same flexplate on, and the bolts hit the block.

.

Crankster · 02-02-2018, 09:16 PM

I bet Blue loctite wouldn't be a bad plan

Hoosier Hurricane · 02-03-2018, 07:32 AM

Also, the flywheel bolts have to have thinner heads than standard bolts or they will possibly rub the springs in the center part of the clutch disc. The pressure plate bolts have longer unthreaded portions under the head to act as dowels to locate the pressure plate. No lock washers on the flywheel bolts, lock washers on the pressure plate bolts. John

KULTULZ · 02-03-2018, 07:48 AM

FLYWHEEL-

C3AZ 6379-A (6)
7/16" - 20 X 27/32" HEX HEAD NYLON PELLET LOCK

PRESSURE PLATE-

350329-S2 (6) - BOLT
5/16" - 18 X 13/16"

34806-S7 (6) LOCK WASHER
5/16" -

Above GRADE 8 Case Hardened

If cannot find NOS, maybe AMK or ARP.

Be careful of CHI-COM substitutions.

Ol'school · 02-03-2018, 10:38 PM

Sponsored Links (Register now to hide all advertisements)

Thanks for the great information on the proper bolts to use. Now I know what to look for.

02-02-2018, 08:29 PM	#1
Ol'school Junior Member Join Date: May 2010 Location: Western Washington Posts: 13	flywheel bolts? Does anybody know what size and grade of bolts I should use on attaching the flywheel to the crank on my '57 TBird stick 292 Y Block? Also the proper bolts to use for attaching the pressure plate? Do I use lock washers on the bolts? Thanks

02-02-2018, 09:05 PM	#2
dmsfrr Senior Member Join Date: Aug 2012 Location: Abq, NM Posts: 3,607	Re: flywheel bolts? Not sure what the specs are on the bolts, but make sure they don't end up too long. If they go thru the crank flange more than 1 thread or so they can lock up against the rear of the block. I semi-recently replaced the old engine in my project with a rebuilt 292. Used the same crank flange bolts (w/ spacer ring) from the old engine to hold the same flexplate on, and the bolts hit the block. . Last edited by dmsfrr; 02-03-2018 at 11:31 PM.

02-02-2018, 09:16 PM	#3
Crankster Senior Member Join Date: Oct 2017 Posts: 563	Re: flywheel bolts? I bet Blue loctite wouldn't be a bad plan

02-03-2018, 07:32 AM	#4
Hoosier Hurricane Member Join Date: Nov 2010 Posts: 85	Re: flywheel bolts? Also, the flywheel bolts have to have thinner heads than standard bolts or they will possibly rub the springs in the center part of the clutch disc. The pressure plate bolts have longer unthreaded portions under the head to act as dowels to locate the pressure plate. No lock washers on the flywheel bolts, lock washers on the pressure plate bolts. John

02-03-2018, 07:48 AM	#5
KULTULZ Senior Member Join Date: Aug 2012 Location: IN A 'GALAXIE' FAR FAR AWAY Posts: 6,466	Re: flywheel bolts? FLYWHEEL- C3AZ 6379-A (6) 7/16" - 20 X 27/32" HEX HEAD NYLON PELLET LOCK PRESSURE PLATE- 350329-S2 (6) - BOLT 5/16" - 18 X 13/16" 34806-S7 (6) LOCK WASHER 5/16" - Above GRADE 8 Case Hardened If cannot find NOS, maybe AMK or ARP. Be careful of CHI-COM substitutions. __________________ *** - WHY IS IT ... - ... that everything you buy in the grocery store is either wrapped in or contained in plastic but the government doesn't want you to carry it out in a plastic bag? WONDERING IN W(BY GOD)V ... DIAGNOSED CDO** - (OCD In Correct Alphabetical Order)

02-03-2018, 10:38 PM	#6
Ol'school Junior Member Join Date: May 2010 Location: Western Washington Posts: 13	Re: flywheel bolts? Sponsored Links (Register now to hide all advertisements) Thanks for the great information on the proper bolts to use. Now I know what to look for.

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