Date code for 3817173

[Doug R.]

I am looking for a 3817173 balancer for my 65 L76 engine.My engine build code is MAY 3, 1965. What dates would be judged correct for the date code on the balancer? How many months prior to May '65 would be considered correct?

[Terry M.]

Re: Date code for 3817173

I am looking for a 3817173 balancer for my 65 L76 engine.My engine build code is MAY 3, 1965. What dates would be judged correct for the date code on the balancer? How many months prior to May '65 would be considered correct?

ALL dates, except glass, are to be within six months before production*. Since you are asking about a part that was installed at the engine assembly plant (as opposed to St Louis) the relevant date is the assembly date of your engine -- as you have indicated. Can this date be judged?

* In a few cases there are specific items that the TIM&JG specifies that can be different that the above general rule. Since I am not familiar with mid-years I cannot cite you any examples, nor do I know if the vibration damper would be an exception. Someone with more technical knowledge of mid-years, or a copy of the relevant judging manual, may provide specific information for your situation.

[William C.]

Re: Date code for 3817173

Damper is shipped on the engine so would have to predate the engine build...

[John H.]

Re: Date code for 3817173

I am looking for a 3817173 balancer for my 65 L76 engine.My engine build code is MAY 3, 1965. What dates would be judged correct for the date code on the balancer? How many months prior to May '65 would be considered correct?

Doug -

FWIW, I don't think the date stamp on a 7173 balancer hub is visible with the pulley installed; it would be if it was on the inertia ring.


BalancerBoltSB800.jpg

[Tracy C.]

Re: Date code for 3817173

stamp is on the engine side of inertia ring

[Wayne M.]

Re: Date code for 3817173

stamp is on the engine side of inertia ring

That is also my recollection, the fin side on my early '65 L76 (lightly stamped 64H [or is it H64; I forget]. Tried to turn the engine over to verify but too difficult to see without a lift.

[John H.]

Re: Date code for 3817173

stamp is on the engine side of inertia ring

Tracy -

See photo below of a 7173 balancer with the date stamp on the forward side of the hub.


Balancer7173Frt.jpg

[Mike E.]

Re: Date code for 3817173

How close are the ones that Paragon sells? Think I might need one too, the rubber going bad on a used part that's nearly 50 years old concerns me.





This one on EBay does have a date on the inertia ring. But it's on the back side. It looks like it's stamped not part of the casting.




Mike

[John H.]

Re: Date code for 3817173

How close are the ones that Paragon sells? Think I might need one too, the rubber going bad on a used part that's nearly 50 years old concerns me.

Mike

Mike -

There are two outfits in Redding, California that rebuild them, well and correctly (Damper Dudes and Damper Doctor).

[Mike E.]

Re: Date code for 3817173

Mike -

There are two outfits in Redding, California that rebuild them, well and correctly (Damper Dudes and Damper Doctor).

Thanks John! It looks like they put a sleeve on the sealing surface too. That's probably just as important too.

Mike

[Tracy C.]

Re: Date code for 3817173

I can't spot the date in that pic but if there it goes to show there are no absolutes when people are involved.

[John H.]

Re: Date code for 3817173

I can't spot the date in that pic but if there it goes to show there are no absolutes when people are involved.

Tracy -

If you click a second time on the image after clicking on the thumbnail and look closely, you'll see the date stamp at about 11 o'clock on the hub (the board software reduced the image from 98KB to 38KB when I uploaded it).

[Tracy C.]

Re: Date code for 3817173

Are you sure the "CS" is a date? Maybe it a casting mold or manufacture's ID . Other pics in this thread show date stamps I'm familiar with as being on the backside of the itertia ring.

[John H.]

Re: Date code for 3817173

Are you sure the "CS" is a date? Maybe it a casting mold or manufacture's ID . Other pics in this thread show date stamps I'm familiar with as being on the backside of the itertia ring.

Tracy -

Dunno - photo below is the back side of the same balancer, and I don't see any stamp on it anywhere.


Balancer7173Rear.jpg

[Michael H.]

Re: Date code for 3817173

Are you sure the "CS" is a date? Maybe it a casting mold or manufacture's ID . Other pics in this thread show date stamps I'm familiar with as being on the backside of the itertia ring.

Tracy,

I think you're right. The "CS" is not a stamped date. The CS is part of the original casting.

Scans below show a close up of the cast in CS in one and the G64 date stamp on the other. (date hard to see on far right side)