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Old 01-16-2019, 05:02 PM   #1
pimpston65
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Which flywheel,clutch setup

Iím looking for the correct size flywheel and clutch for my 292 with 3 speed. I need help!!!
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Old 01-17-2019, 02:31 PM   #2
61K10
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Re: Which flywheel,clutch setup

should be a 168 tooth flywheel. I think 292 flywheels have bigger bolt holes than a 283/235. somebody should chime in TJ?
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Old 01-17-2019, 05:22 PM   #3
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Re: Which flywheel,clutch setup

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should be a 168 tooth flywheel. I think 292 flywheels have bigger bolt holes than a 283/235. somebody should chime in TJ?
i will he should know thanks
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Old 01-17-2019, 08:22 PM   #4
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Re: Which flywheel,clutch setup

'67 - '71 292s had 11'' flywheels, '72s had 12''. 292 L6 was same as SBC.
'67 and later 292s have six 1/2''-20 bolts and 3 dowel pins [.4520-27''] securing flywheel to cam end.

L6 292s from MY '63 - '66 used six 7/16''-20 bolts and one dowel pin, like the 250s and 230s. Santucci recommends upgrading to the 1967 standard.
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Old 01-17-2019, 09:07 PM   #5
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Re: Which flywheel,clutch setup

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Originally Posted by 68OrangeSunshine;8445423]'67 - '71 292s had 11'' flywheels, '72s had 12''. 292 L6 was same as SBC.
'67 and later 292s have six 1/2''-20 bolts and 3 dowel pins [.4520-27'
securing flywheel to cam end.

L6 292s from MY '63 - '66 used six 7/16''-20 bolts and one dowel pin, like the 250s and 230s. Santucci recommends upgrading to the 1967 standard.
thanks, my block is from a 67 truck. so i will ck nto the 11" 1/2"bolts its a new crank without dowels should iput new dowels in?
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Old 01-17-2019, 09:27 PM   #6
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Re: Which flywheel,clutch setup

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thanks, my block is from a 67 truck. so i will ck nto the 11" 1/2"bolts its a new crank without dowels should iput new dowels in?
I would.
When I R & R ed my 292 in '05, I got dowel pins from the Chevy dealer -- they didn't fit. I got Leo Santucci's specified .452~'' pins, they didn't fit right either. My machinist came up with 3 pins that did fit, but I didn't mic them for posterity. My advice is to play that size by ear. The 292 is a torque monster, so don't skip the dowel pins.
Santucci gives an alternative in his book: "Chevy Inline Six Cylinder Power Manual," you could have the machinist tap the dowel pin holes to 1/2''-20 and use 3 more bolts there, but they have to have 12-point heads for clearance. Really a competition grade option.
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Old 01-18-2019, 03:05 AM   #7
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Re: Which flywheel,clutch setup

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Originally Posted by '68OrangeSunshine View Post
I would.
When I R & R ed my 292 in '05, I got dowel pins from the Chevy dealer -- they didn't fit. I got Leo Santucci's specified .452~'' pins, they didn't fit right either. My machinist came up with 3 pins that did fit, but I didn't mic them for posterity. My advice is to play that size by ear. The 292 is a torque monster, so don't skip the dowel pins.
Santucci gives an alternative in his book: "Chevy Inline Six Cylinder Power Manual," you could have the machinist tap the dowel pin holes to 1/2''-20 and use 3 more bolts there, but they have to have 12-point heads for clearance. Really a competition grade option.
awesome, i'll go to the speed shop that did the work to get the dowels
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Old 01-18-2019, 06:41 AM   #8
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Re: Which flywheel,clutch setup

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awesome, i'll go to the speed shop that did the work to get the dowels
They should be all over it.
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Old 01-18-2019, 07:37 AM   #9
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Re: Which flywheel,clutch setup

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They should be all over it.
im just glad its in pieces still... plus they are less then 10mi away.

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Old 06-24-2019, 11:41 PM   #10
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Re: Which flywheel,clutch setup

Any update to your situation? I'm just now finding out that the new crankshaft in my 292 is tapped for 1/2" bolts, but the flywheel that I had the machinist resurface has 7/16" holes.
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Old 06-25-2019, 12:43 AM   #11
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Re: Which flywheel,clutch setup

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Any update to your situation? I'm just now finding out that the new crankshaft in my 292 is tapped for 1/2" bolts, but the flywheel that I had the machinist resurface has 7/16" holes.
If I'm not mistaken, Model Years '63 - '66 had 7/16''. MY '66 and later- had the 1/2''.
Just have the machinist rebore the holes to 1/2''.

L6 292 had 6 bolts and 3 dowel pins. L6 250/230s had 6 bolts and one dowel pin.
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Old 06-25-2019, 01:00 AM   #12
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Re: Which flywheel,clutch setup

Ok. So it looks like I have the flywheel from a 250. Which is entirely possible because we did have a 250 in the truck when we got it. I think I'd be better off getting the correct flywheel with the the three dowel holes for the 292. Its faster to get a new one than send one out and wait for it to get done. Thanks for your reply '68OrangeSunshine.
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Old 06-25-2019, 05:36 AM   #13
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Re: Which flywheel,clutch setup

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Originally Posted by Mike_The_Grad View Post
Ok. So it looks like I have the flywheel from a 250. Which is entirely possible because we did have a 250 in the truck when we got it. I think I'd be better off getting the correct flywheel with the the three dowel holes for the 292. Its faster to get a new one than send one out and wait for it to get done. Thanks for your reply '68OrangeSunshine.
Sure. 292's flywheel is the 11'' model, just like an SBC. I heard in '72 MY, they even went to a 12'' flywheel, but I'm not sure that's needed. If you have an 11 clutch pressure plate, you don't need a 12''.
Santucci's book lists the crank end bolt holes as six in 1/2-20 UNF, and the three dowel pin holes to be reamed to .4520 - .4527''.
L25 MY '67 and later did have the half inch bolts. [L25 is the 292 L6's SPID code.]
I'd be more worried that the new replacement flywheel wasn't made in the USA to proper industrial tolerances, than I would worry about real Detroit steel of the right vintage.
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