paint color question
Thread Starter
Drifting
Joined: Oct 2007
Posts: 1,254
Likes: 5
From: Brown Summit North Carolina
paint color question
I have purchased an original side bleeder master cylinder for my 71 car.
Were these parts originally painted black from GM or were they a raw casting with no finish or painted grey?
I need to know if should paint a satin black or a grey cast iron color.
Need to know the same about the steering gear box , I am thinking a satin grey or a cast coat iron??
Thanks
David
Were these parts originally painted black from GM or were they a raw casting with no finish or painted grey?
I need to know if should paint a satin black or a grey cast iron color.
Need to know the same about the steering gear box , I am thinking a satin grey or a cast coat iron??
Thanks
David
Last edited by dmayhew; Dec 15, 2008 at 07:08 PM.
Le Mans Master
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
My NCRS 70-72 Corvette Technical guide says "The Master Cylinder was painted a semi-flat black. A semicircular area at the front of the casting was machined after painting and should be a natural finish." They probably painted the casting before it was machined.
Team Owner
Joined: Sep 2006
Posts: 31,274
Likes: 4,366
From: Westminster Maryland
Hi David,
To take Duke's reply one step further, the two flat bosses that the brake lines screw into were machined, too.
On my master cylinder I taped off the three areas, painted it semi-gloss black and then sprayed a little semi-gloss clear on the three machined areas to keep them from rusting.
The front boss has a 2 letter broadcast code stamped on it, and the front boss, of the 2 on the side, has a tiny date code stamp. In this case, 0338, or the 338th day of 1970, for a January built car.
The boss looks painted in this picture but its just glare.
Regards,
Alan
To take Duke's reply one step further, the two flat bosses that the brake lines screw into were machined, too.
On my master cylinder I taped off the three areas, painted it semi-gloss black and then sprayed a little semi-gloss clear on the three machined areas to keep them from rusting.
The front boss has a 2 letter broadcast code stamped on it, and the front boss, of the 2 on the side, has a tiny date code stamp. In this case, 0338, or the 338th day of 1970, for a January built car.
The boss looks painted in this picture but its just glare.
Regards,
Alan
Le Mans Master
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
Missed your ? on the steering gear box. NCRS says "gear box was natural finish on earlier cars and semi-gloss black on later". Not sure what a earlier vs later is. Mabe Alan can help.
Thread Starter
Drifting
Joined: Oct 2007
Posts: 1,254
Likes: 5
From: Brown Summit North Carolina
A big thanks to all of you guys for the help. I really appreciate it.
Alan , the one I bought has PG on the front and 239 is the number.
My car was assembled 1st. day of December 1970. That works out to be about day 335 or 3 months after date stamp on part.
That is pushing the time gap on parts but sinced no cars were assembled in either sept or oct. I felt that this date was close as I could get.
David
Alan , the one I bought has PG on the front and 239 is the number.
My car was assembled 1st. day of December 1970. That works out to be about day 335 or 3 months after date stamp on part.
That is pushing the time gap on parts but sinced no cars were assembled in either sept or oct. I felt that this date was close as I could get.
David
Last edited by dmayhew; Dec 15, 2008 at 07:23 PM.
Thread Starter
Drifting
Joined: Oct 2007
Posts: 1,254
Likes: 5
From: Brown Summit North Carolina
Made a little progress this past weekend. The boot where the clutch rod passes thru the fireall was a bear to remove. It was in bad shape , but the screws would not budge. Took over an hour to drill the heads / grind the rest and pry it off the fire wall.
I have the frame primed after wire brushing to bare metal. Have one fender skirt sanded / primed and need to finish fire wall and other fender skirt.
As for timing on the project. I have ran into unexpected projects.
need a 400.00 clutch and the intake is being re skinned in MD. by Jerry MacNeish , but needs a couple of repairs that are now in the 300.00 range with the re skinning. That about 500.00 in unexpected.
So for budget reasons I will streatch out to April.
Thanks
David
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From: Southbound
Cruise-In II Veteran
The engine stamp and casting dates on my fiancee's '71 indicate the car was set for mid-September assembly. The time/build date is December 1.
