What is the technically correct finish for intake bolts ?? - Team Camaro Tech
Tech 2002 General Tech questions from 2002
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post #1 of 17 (permalink) Old Jun 24th, 02, 08:42 AM Thread Starter
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Kevin Stone
 
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I'm finishing up a full frame off on another '69. What are the technically correct finishes for intake bolts on a small block. painted orange, natural, or phosphate.. I don't recall.............

Thanks !!

Wacky
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post #2 of 17 (permalink) Old Jun 24th, 02, 01:03 PM
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Painted orange with an iron intake, black phosphate with an aluminum intake.

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post #3 of 17 (permalink) Old Jun 24th, 02, 10:25 PM
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TJ
 
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Heh, interesting. I never would have even paid any attention to bolts. Sounds like you are really aiming at an all-out restoration as it cam from the plant. That will be a nice mouse, be proud!
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post #4 of 17 (permalink) Old Jun 25th, 02, 01:13 AM
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John
 
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67-68 w/aluminum intake used silver cadium plated bolts. They may have switched to black phosphate in 69, or maybe big block and small block used different types.
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post #5 of 17 (permalink) Old Jun 25th, 02, 12:49 PM Thread Starter
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Kevin Stone
 
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I'm shooting for a high points car..This car is worth it.. See the picture I sent you of the engine during the early stages of assembly..

Wacky

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post #6 of 17 (permalink) Old Jun 25th, 02, 01:17 PM
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John,
Jerry M. says 302's got silver cad bolts without shoulders on the intake FWIW.

-Mark.
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post #7 of 17 (permalink) Old Jun 25th, 02, 01:19 PM
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I have to defer to the Camaro restoration experts on this one, but small-block Corvettes of the same era had black phosphate intake bolts with aluminum manifolds (same bolt that was painted over on engines with iron manifolds); all Corvette small-block engines came from Flint Engine, as did the engine in my unmolested original '69 Z/28, which also has black phosphate intake bolts.

Corvette big-blocks of the same era(Tonawanda) used silver zinc/cadmium-plated intake bolts with aluminum manifolds.

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post #8 of 17 (permalink) Old Jun 26th, 02, 03:10 AM
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Mark
 
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John,
Thanks for the info. It seems logical that what ever was done in the plant would apply to Camaro as well as Corvette. Someone with a GM small parts catalog could look up the finish specs for confirmation. If there were no known finish exceptions where some were one way and some were another way I would tend to go with whatever the NCRS spec is. You could make a connection with silver cad bolts with aluminum intakes and black phosphate with paint for iron but that is just a SWAG.


While we are looking at intakes, does your survivor DZ 302 car have plain, orange or silver lift brackets. That is another area that is suspect to me from Jerry's book. The Corvette info I have said that alumimum intakes got natural or silver lift brackets while iron intakes got orange paint which seems logical.

Any additional insight is apreciated and welcome

-Mark.
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post #9 of 17 (permalink) Old Jun 26th, 02, 02:29 PM
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Mark -

Dunno about the lift brackets - mine has none, and the intake shows no signs of ever having them. I've never owned a Corvette later than a '67, and Corvettes of that era didn't have them.

1968 was the first year for lift brackets (prior to that they were carried with scissors-type hooks under the exhaust manifolds), and the lift brackets came and went several times over the next two years - the finance types couldn't stand the thought of sending two assembly plant one-time use parts with each car. Fuzzy area to document.

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post #10 of 17 (permalink) Old Jun 27th, 02, 04:24 AM
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Charley
 
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JohnZ...In a thread about show quality carbs you post a pic of your carb. In that photo the rear intake bolts appear to be Cad plated. Are we all speaking the same language or am I possibly seeing the photo wrong ?
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post #11 of 17 (permalink) Old Jun 27th, 02, 01:52 PM
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Jim
 
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If anyone has been to the incredible muscle car museum in Pidgeon Forge, Tenn., The original, low miles 69 z-28 has silver cad bolts and PAINTED lift brackets. That is my reference car and I have done just about every thing the same way due to the fact that our vin #'s are only about 850 apart but about a million miles apart as far as originality.
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post #12 of 17 (permalink) Old Jun 27th, 02, 01:54 PM
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Jim
 
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I should have said condition. I am doing a correct restoration and then I am gonna drive the wheels off the thing.
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post #13 of 17 (permalink) Old Jun 27th, 02, 02:16 PM
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ummgawa, "painted" lift brackets....What color?

-Mark.
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post #14 of 17 (permalink) Old Jun 28th, 02, 10:12 AM
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Chevy Orange
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post #15 of 17 (permalink) Old Jun 29th, 02, 06:48 AM
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Charley -

After I had Jerry re-skin the intake, I used new (incorrect) zinc-plated bolts and the small-O.D. AN stainless washers under them to avoid gouging the manifold surface. If I was going to have the car Diamond-judged, I'd put the original black phosphate bolts (with no washers) back on it.

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