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105008 Posts in 12267 Topics by 4728 Members
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3676  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.
3677  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
3678  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.
3679  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.
3680  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.
3681  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.
3682  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.
3683  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.
3684  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.
3685  Camaro Research Group Discussion / Originality / Re: X77 dash wood grain on: July 09, 2006, 09:23:30 AM
Didn't Z23 specify special interior trim with comfort weave vynl seats and molded door panels?

Nope, that was the RPO Z87 deluxe interior, which included the Z23 items plus the Comfortweave seats, molded door panels, wood-grain all across the passenger side of the dash, trunk mat, hood insulator pad, etc. The Z87 deluxe interior carried a different trim combination number than the same color standard interior on the cowl tag, so you can tell by the trim number whether or not the car originally had a standard or deluxe interior.
3686  Camaro Research Group Discussion / Originality / Re: What were the original nuts used on the '69 rear spoiler on: July 09, 2006, 09:13:31 AM
My unmolested original 02D Norwood Z/28 with factory D80 has domed "acorn" nuts across the rear, and hex nuts with integral conical washers across the front - photo below.  Smiley
3687  Camaro Research Group Discussion / Decoding/Numbers / Re: Interesting date on the Trim Tag on: July 08, 2006, 10:29:45 AM
I started my GM career at Willow Run in 1964 as a Production Foreman, when we were building the Corvair and Chevy II together on the same line (50-50 mix) at 65 per hour; left in 1966 for the Chevrolet Pilot Line in Flint.
3688  Camaro Research Group Discussion / Decoding/Numbers / Re: Paint code question on: July 08, 2006, 10:23:12 AM
Yes, that's correct - Cortez Silver with a black standard interior.
3689  Camaro Research Group Discussion / Decoding/Numbers / Re: X code question on: July 08, 2006, 10:20:43 AM
The X44 code means the car was a small-block non-Z/28, non-SS without the Z21 Style Trim and without the Z22 RS package; see http://www.camaros.org/numbers.shtml#XnnCodes . Many COPO's were X44 cars, but none had A/C.
3690  Camaro Research Group Discussion / General Discussion / Re: Engine Block P/N - A Question for JohnZ on: July 08, 2006, 10:14:46 AM
Precisely the same situation existed for 350 and 400 blocks - they were also machined for both 2- and 4-bolt mains depending on application, with no external identification either way. The mains were machined with the caps in place, and a visual check of the three center main caps was the only way to differentiate the 2-bolts from the 4-bolts.
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