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107632 Posts in 12512 Topics by 4812 Members
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3721  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).
3722  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.
3723  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.
3724  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.
3725  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.
3726  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
3727  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.
3728  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
3729  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.
3730  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.
3731  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.
3732  Camaro Research Group Discussion / Maintenance / Re: Powerglide - what type of fluid do I use? on: July 10, 2006, 09:37:46 AM
Use whatever the latest GM ATF is.
3733  Camaro Research Group Discussion / Restoration / Re: 1969 Z-28 Tires on: July 10, 2006, 09:36:13 AM
Mine had 235/60-15 BFG T/A radials on it (on the original "YH" rally wheels) when I bought it six years ago (and a very worn original Wide Tread GT spare which I trashed); I had rubbing issues at the front at 12 o'clock on the wheel opening moldings (with original springs that have lost a little ride height), and put a set of new 215/65-15 BFG T/A radials on it last summer - no more rubbing issues, and the speedo is dead on at 70mph.
3734  Camaro Research Group Discussion / Originality / Re: What were the original nuts used on the '69 rear spoiler on: July 10, 2006, 09:27:13 AM
Mine has never been off the car, so I don't know if it has sealing washers between the spoiler and the deck lid surface or not; the hex nuts with conical washers securing the front edge do have sealing washers on them, which were integral with the nut.
3735  Camaro Research Group Discussion / Restoration / Re: 1969 Z-28 Tires on: July 09, 2006, 09:37:39 AM
'69 Z/28's used E70-15 tires, either Goodyear Wide Tread GT or Firestone Sport Car 200, both of which had raised white letters. Coker makes a reproduction of the Sport Car 200, but I haven't seen the Kelsey Goodyear. In any case, I wouldn't put bias-ply tires on any car I own and sacrifice driving/handling for looks.

Edit: Just went to the Kelsey site (www.kelseytire.com), and they do have the repro E70-15 Wide Tread GT - tire looks good, but I wouldn't spend $230 per tire for bias-ply tires.
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