Author Topic: bolt circle on flywheel  (Read 1287 times)

Offline ccp49

  • Posts: 75
bolt circle on flywheel
« on: June 12, 2012, 07:01:30 PM »
Can anyone help identify the use of the inner bolt circle on this flywheel.  I beleive it is out of an early-50's Cad and I am planning on using it in my 49.  As you can see, the driven disc (the clutch disc) has a larger diameter than the bolt circle, so the holes get covered up.  The holes are threaded, and it appears that the disc is not effected by them.

Thanks for any hints!

Dan Barbieri
Dan Barbieri
'49 Conv "in the works"
Cedar Rapids, Iowa

Offline Doug Houston

  • Posts: 852
  • CLC Number: 2257
Re: bolt circle on flywheel
« Reply #1 on: June 12, 2012, 11:07:17 PM »
The flywheel on the 1949 and later Cadillacs is a 14 inch diameter style. I'm wondering if you might have a clutch from a '48 and earlier car, that used a 15 inch flywheel.

BTW......I hope that you're not going to install that scuzzy mess of a flywheel on ANYTHING!!!
38-6019S
38-9039
39-9057B
41-6227D
41-6019SF
41-6229D
41-6267D
56-6267
70-DeV Conv
41-Chev 41-1167
41 Olds 41-3929

Offline ccp49

  • Posts: 75
Re: bolt circle on flywheel
« Reply #2 on: June 13, 2012, 07:17:55 AM »
Ha!  No, if this flywheel is correct for the car, which I am thinking it is, I'll have it reconditioned along with the disc and pressure plate.  The disc in the set is 11".
This came from a guy who was going to use an early 50's motor in a hot rod in the 60's/70's, so I am wondering if this flywheel was modified for some kind of high-performance clutch disc and pressure plate. 
Dan Barbieri
'49 Conv "in the works"
Cedar Rapids, Iowa

Offline Doug Houston

  • Posts: 852
  • CLC Number: 2257
Re: bolt circle on flywheel
« Reply #3 on: June 13, 2012, 03:54:40 PM »
Your best bet is to go to a clutch rebuilder with this question. From the picture, the flywheel could be correct for a '49 car. The clutch rebuilder will be able to get you on the right track.
38-6019S
38-9039
39-9057B
41-6227D
41-6019SF
41-6229D
41-6267D
56-6267
70-DeV Conv
41-Chev 41-1167
41 Olds 41-3929

Offline Mike Simmons 938

  • Posts: 247
Re: bolt circle on flywheel
« Reply #4 on: June 13, 2012, 07:31:50 PM »
I will try to attach a photo of a 50's setup. In contrast to your "mystery" flywheel, it does not have the deep outerlip  (much deeper than that found on the flathead flywheel). Note the location of the ring gear as well.And, though it is not visible, the flywheel  bolts go through a flat surface, not the recessed holes in the picture. I am not familiar with 1937 and earlier Cads, but this looks like it could be from a multi-disc clutch setup.
I don't think this is working!

Offline ccp49

  • Posts: 75
Re: bolt circle on flywheel
« Reply #5 on: June 14, 2012, 12:02:38 AM »
yes, that looks the same as Jay Friedman's clutch setup, including the flywheel.  The thickness of your flywheel makes it look like it weighs a lot more.  Pressure plate has significant differences, too.  Notably, mine has 4 engagement levers, versus three on yours, and 6 bolt pattern to mount it to the flywheel, versus 8 on mine. 
 
Dan Barbieri
'49 Conv "in the works"
Cedar Rapids, Iowa

Offline Mike Simmons 938

  • Posts: 247
Re: bolt circle on flywheel
« Reply #6 on: June 18, 2012, 12:41:42 AM »
Dan- Suggest you check out Wilcap.com- get one brand new. note also that the Cad and Olds flywheels from 49 to 52 have the same part number-3508082, which can expand your sources. There are far more Olds flywheels out there than Caddy. Your current flywheel is NOT one of them.

 

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