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105663 Posts in 12339 Topics by 4753 Members
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3676  Camaro Research Group Discussion / Originality / Re: What were the original nuts used on the '69 rear spoiler on: July 17, 2006, 12:04:11 PM
I believe a CRG Research Report on deck lids is being developed, and will be published on the site when it's completed.
3677  Camaro Research Group Discussion / General Discussion / Re: VIN vs. build date...do these add up? on: July 17, 2006, 12:01:46 PM
There was no "roller-coaster" - Norwood built 912 units per day (on two shifts), barring shift cancellations; there was no day-to-day change in the actual line rate per hour. The ramifications of a line rate change in an assembly plant are a nightmare, as it changes every operation in the plant, and Norwood's maximum rated capacity was 57 units per hour - you don't increase that without expanding the plant.
3678  Camaro Research Group Discussion / Originality / Re: What were the original nuts used on the '69 rear spoiler on: July 16, 2006, 11:13:04 AM
There were three different design iterations of the '69 deck lid (not counting the service replacement, which was yet another version); the one on my original 02D car with the weld tabs is the "second design" version.
3679  Camaro Research Group Discussion / Decoding/Numbers / Re: Body Sequence Numbers marked on firewall and front clip? on: July 16, 2006, 11:07:05 AM
Some guys could not read, so they had to mark numbers on things so they knew where the parts went. LOL

Actually, there's more truth to that than you might think - in those days, around 10% of the hourly workforce was functionally illiterate and couldn't read; they had to be trained to read Broadcast Copies and to rely on other "clues" from the cars and from co-workers.
3680  Camaro Research Group Discussion / Decoding/Numbers / Re: 1969 Norwood and Van Nuys Production on: July 15, 2006, 02:01:01 PM
Norwood built only Camaros until April 15th, 1969, when they added the Firebird (transferred from Lordstown).
3681  Camaro Research Group Discussion / Maintenance / Re: Replacing rear housing on: July 14, 2006, 10:15:12 AM
There's no replaceable "housing" on any post-'64 GM 10-bolt or 12-bolt axles; the only removable part is the stamped sheet metal rear cover, and none of the internal parts interchange. We used to call it the "pumpkin" on C1 Corvettes and '64 and earlier passenger cars when the front of the axle housing that contained the gears and diff was a separate casting that bolted to the "banjo" (axle housing), like a Ford 9-inch axle.
3682  Camaro Research Group Discussion / Maintenance / Re: Oil Leak on: July 14, 2006, 10:07:15 AM
Muncies never had a seal at the front bearing - lube that made its way through the bearing was deflected by the nut, ran down the inside of the flange on the bearing retainer, and drained back into the case through the drainback hole. Make sure the bearing retainer gasket is installed correctly and isn't blocking the drainback channel. Many report that running the lube level about 1/2" below the fill hole (instead of even with the bottom of the hole) minimizes this issue.
3683  Camaro Research Group Discussion / Decoding/Numbers / Re: How close is close enough? on: July 14, 2006, 09:58:40 AM
In '69, the body number was assigned when the dealer order was accepted for production, not when the body was actually built; on the other hand, the Chevrolet VIN number was assigned after the finished body was received by Chevrolet and actually entered the production system. No direct correlation unit-by-unit.
3684  Camaro Research Group Discussion / Decoding/Numbers / Re: Body Sequence Numbers marked on firewall and front clip? on: July 13, 2006, 09:04:49 AM
Fisher Body had their own internal sequence numbers, which had no meaning to Chevrolet. When the body was "broadcast" out of the Chevrolet body bank into the Chevrolet assembly system, it was assigned a Chevrolet Broadcast sequence number, which was how the entire Chevrolet system was synchronized. That number went from zero to 999 and rolled over back to zero after 999; that's the number you see on the inside of the valance panel and wheel, and on numerous other parts and subassemblies that Chevrolet installed.
3685  Camaro Research Group Discussion / Decoding/Numbers / Re: Radiator Question ? on: July 12, 2006, 09:09:05 AM
Probably a replacement - see: http://www.camaros.org/coolingsystems.shtml
3686  Camaro Research Group Discussion / General Discussion / Re: Tires - how wide to go on my 14x6 rallys? on: July 12, 2006, 09:02:28 AM
215's are about the widest you can mount on a 6" rim without distorting the cross-section of the tire, according to the tire manufacturer's specs and the Tire & Rim Association specs.
3687  Camaro Research Group Discussion / Maintenance / Re: exhaust manifold torque on: July 11, 2006, 10:44:57 AM
Shows how much I know about L-6's - I just took the specs from the Chassis Service Manual, which has a spec for the "end bolts" on the L-6.  Roll Eyes
3688  Camaro Research Group Discussion / Maintenance / Re: valve cover torque setting on: July 11, 2006, 10:42:46 AM
It's 45-50 INCH-pounds; don't over-tighten - it'll distort the cover and cause a leak.
3689  Camaro Research Group Discussion / Restoration / Re: 1969 Z-28 Tires on: July 11, 2006, 10:39:11 AM
That's why I swapped out the original 4.10's and replaced them with 3.55's (and a new Series 3 Eaton Posi); 3900 at 70 finally got to me - now it's around 3300, which is tolerable for highway travel.
3690  Camaro Research Group Discussion / Maintenance / Re: exhaust manifold torque on: July 10, 2006, 09:49:02 AM
L6's are 30.

Arno

On the L-6's, only the bolts that use clamps to span the ears on both manifolds are 30; the end bolts (which go through holes in the manifold ears) are 20 ft-lbs.
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