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Crank damper

Started by Skidado, June 22, 2020, 12:21:22 PM

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Skidado

67 GT350 4-speed thermactor car #2751

My crank damper looks like the outer ring has slipped a few degrees.  I checked it for TDC today and I think it is about 5 degrees off.  So I have located a replacement - a correct original HiPo C3 damper.  However, on checking back to mine on the car, it looks like I've currently got a service replacement C8 damper!!  It's certainly been on the car since 1983...  Hopefully the attached picture is clear enough.

It is date coded B7 which I assume is February 67.  The engine assembly date was 7E9W (May 67?) and the vehicle assembly date was 25th May '67 which all chimes ok.

Did the factory ever use the 'stepped' style dampers on HiPo motors, or is this really a replacement?

David

ps - I think the drill holes you see on the circumference were added when I had the engine balanced a few years back.

Bob Gaines

Quote from: Skidado on June 22, 2020, 12:21:22 PM
67 GT350 4-speed thermactor car #2751

My crank damper looks like the outer ring has slipped a few degrees.  I checked it for TDC today and I think it is about 5 degrees off.  So I have located a replacement - a correct original HiPo C3 damper.  However, on checking back to mine on the car, it looks like I've currently got a service replacement C8 damper!!  It's certainly been on the car since 1983...  Hopefully the attached picture is clear enough.

It is date coded B7 which I assume is February 67.  The engine assembly date was 7E9W (May 67?) and the vehicle assembly date was 25th May '67 which all chimes ok.

Did the factory ever use the 'stepped' style dampers on HiPo motors, or is this really a replacement?

David

ps - I think the drill holes you see on the circumference were added when I had the engine balanced a few years back.
What is the engineering number on the block?
Bob Gaines,Shelby Enthusiast, Shelby Collector , Shelby Concours judge SAAC,MCA,Mid America Shelby

gt350hr

    C5OE numbered , beveled balancer only for '67 350s.
Celebrating 46 years of drag racing 6S477 and no end in sight.

Krelboyne

Dale's Manufacturing can repair it like new. We use their services.

http://www.hbrepair.com/
Scott Behncke - Carchaeologist @ WCCC

Skidado

Quote from: gt350hr on June 22, 2020, 01:28:52 PM
    C5OE numbered , beveled balancer only for '67 350s.

Yes, sorry, I meant C5 not C3.

Skidado


[/quote]What is the engineering number on the block?
[/quote]

C5AE 6015E.

GT350DAVE

The late 67 GT 350 cars did not use the common hipo damper. They used a 68 style damper but it has a 67 part number. Your damper looks correct to me for a 5/25/67 build date.

Dave
Support the SAAC Registry

1175

Dave,

Were any of the very late 289 hipo blocks c8 blocks?

Thanks
Jon

TJinSA

I thought all the 67 timing covers had a cast-in timing pointer; the photo looks like the late 68 & up...
Tom Kubler
6S296

Skidado

Quote from: GT350DAVE on June 22, 2020, 06:11:43 PM
The late 67 GT 350 cars did not use the common hipo damper. They used a 68 style damper but it has a 67 part number. Your damper looks correct to me for a 5/25/67 build date.

Dave

Many thanks Dave - you just saved me from an expensive mistake!

Quote from: TJinSA on June 22, 2020, 08:26:27 PM
I thought all the 67 timing covers had a cast-in timing pointer; the photo looks like the late 68 & up...

At a guess - since this has the '68-style HiPo damper it has to have the '68-style timing pointer.  I could be wrong...  I've been wrong before... Twice!  ;)

David

gt350hr

Quote from: GT350DAVE on June 22, 2020, 06:11:43 PM
The late 67 GT 350 cars did not use the common hipo damper. They used a 68 style damper but it has a 67 part number. Your damper looks correct to me for a 5/25/67 build date.

Dave

       Dave are you saying the "hub" has a C7ZE casting number?
Thank you for enlightening me on the use of the "stepped" balancer. I have only worked on/ seen the beveled version on '67 350s. I obviously haven't seen them "all" LOL
     Randy
Celebrating 46 years of drag racing 6S477 and no end in sight.

GT350DAVE

Quote from: 1175 on June 22, 2020, 07:00:20 PM
Dave,

Were any of the very late 289 hipo blocks c8 blocks?

Thanks
Jon
Hi Jon,
All 67 GT 350 cars had C5AE-6015-E blocks.
Dave
Support the SAAC Registry

GT350DAVE

Quote from: gt350hr on June 23, 2020, 10:56:01 AM
Quote from: GT350DAVE on June 22, 2020, 06:11:43 PM
The late 67 GT 350 cars did not use the common hipo damper. They used a 68 style damper but it has a 67 part number. Your damper looks correct to me for a 5/25/67 build date.

Dave

       Dave are you saying the "hub" has a C7ZE casting number?
Thank you for enlightening me on the use of the "stepped" balancer. I have only worked on/ seen the beveled version on '67 350s. I obviously haven't seen them "all" LOL
     Randy

Hi Randy,
The non beveled version has a C7 part number. This part was also used on the GT 350 cars with AC. The reason for the use on the AC cars is that the lower AC pulley won't fit into the earlier balancer.
Dave
Support the SAAC Registry

gt350hr

 Jim Cowles has a C5OE that is "relieved" for use with A/C. I have seen a couple of these in the past. I have the C7ZE noted in my list of balancer casting numbers but no"details" associated to it. I will add the details.
   Randy
Celebrating 46 years of drag racing 6S477 and no end in sight.

67350#1242

Here is a link to previous discussions:
https://www.saacforum.com/index.php?topic=6759.msg57222#msg57222

Have you looked at the front casting number and is it the modified C5OE to C7ZE ?
Does your car have A/C?
67 GT350  SJ 02/01/67  Gray 4spd A/C
67 Coupe  SJ 11/16/66  White Auto A/C PDB