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.
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?
C5OE numbered , beveled balancer only for '67 350s.
Dale's Manufacturing can repair it like new. We use their services.
http://www.hbrepair.com/ (http://www.hbrepair.com/)
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.
[/quote]What is the engineering number on the block?
[/quote]
C5AE 6015E.
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,
Were any of the very late 289 hipo blocks c8 blocks?
Thanks
Jon
I thought all the 67 timing covers had a cast-in timing pointer; the photo looks like the late 68 & up...
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
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
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
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
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
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?
Quote from: 67350#1242 on June 23, 2020, 01:17:54 PM
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?
If you are asking about my car #2751 - no, it doesn't have AC, but it does have (did have) thermactor air injection (202 build code)..
Quote from: 67350#1242 link=topic=11040.msg93426#msg93426 date=1592932674
Have you looked at the front casting number and is it the modified C5OE to C7ZE ?
Does your car have A/C?
/quote]I too would like to now if the balancer is a C8 or if edited from C5 to C7. I think that the engine assembly date "The engine assembly date was 7E9W (May 67?)" has the most relevance in this case of GT350 with thermactor.
I can't see the casting number as the damper is on an assembled engine in the car. The crank pulley covers the casting number I believe.
Quote from: Skidado on June 24, 2020, 11:09:14 AM
I can't see the casting number as the damper is on an assembled engine in the car. The crank pulley covers the casting number I believe.
When you take the pulley off like it sounds like you will have to do so as to have the dampner rebuilt given it has spun on the hub ,would you please try to remember and report back.
Quote from: Bob Gaines on June 24, 2020, 02:31:47 PM
Quote from: Skidado on June 24, 2020, 11:09:14 AM
I can't see the casting number as the damper is on an assembled engine in the car. The crank pulley covers the casting number I believe.
When you take the pulley off like it sounds like you will have to do so as to have the dampner rebuilt given it has spun on the hub ,would you please try to remember and report back.
Will do Bob - now I just need to find someone in the UK who can rebuild crank dampers...
David
Quote from: Skidado on June 24, 2020, 04:00:31 PM
Quote from: Bob Gaines on June 24, 2020, 02:31:47 PM
Quote from: Skidado on June 24, 2020, 11:09:14 AM
I can't see the casting number as the damper is on an assembled engine in the car. The crank pulley covers the casting number I believe.
When you take the pulley off like it sounds like you will have to do so as to have the dampner rebuilt given it has spun on the hub ,would you please try to remember and report back.
Will do Bob - now I just need to find someone in the UK who can rebuild crank dampers...
David
::) . Disregarding the date code and engineering number which will be covered ,the C8 balance will look the same. You may find that C8 one over there cheaper then restoring the genuine. Put the genuine on the shelf . Just a thought since you are across the pond. Best of luck with the project.
Ok - so, only three years later...
Pulled the crank damper off and I have (hopefully...) attached photos of it. I am as certain as I can be that this is an original part to this engine (I have owned the car 40 years now...). Part number appears to be C7ZE.
I did some checks and it appears that the damper ring has not slipped.
David
I bet it was a relief to find out that the hub had not slipped. Thanks for the report .Better late then never.