Mike A

Tii calipers and valve cover

8 posts in this topic Last Reply

Recommended Posts

Newbie here looking for more info on this 73 Tii.. What plating if any was used on the Tii calipers....yellow zinc, cad,,,??? Also I've seen all kinds of renditions on the valve cover. Mine is an original Tii with the short vent but I don't know what it would have looked like out of the factory. It is a Jan 73 factory build.  Thanks, Mike

Share this post


Link to post
Share on other sites

Nowadays restorers generally replate the calipers in yellow zinc (or yellow cadmium), and that’s what I do. But I believe these platings “over-do” the original shine. Not to worry, they’ll dull down quickly.

 

Valve covers were always bare aluminum castings from the factory: not shiny, not flashy.

 

Below: sales brochures for 1976 and 1975, respectively, and an original press photograph, ca. April 1971. Oh, yeah, and my ‘73.

 

Regards,

 

Steve

 

635B0CD6-3A68-4541-A20B-652C2533845C.jpeg

48C2C34D-A222-4780-A85F-FCA57703D79C.jpeg

1D31826B-D06E-4B02-982D-1608FD91C358.jpeg

E1188908-132A-45B0-A25C-D3B8D21A67B0.jpeg

Edited by Conserv

Share this post


Link to post
Share on other sites
Nowadays restorers generally replate the calipers in yellow zinc (or yellow cadmium), and that’s what I do. But I believe these platings “over-do” the original shine. Not to worry, they’ll dull down quickly.

 

Valve covers were always bare aluminum castings from the factory: not shiny, not flashy.

 

Below: sales brochures for 1976 and 1975, respectively, and an original press photograph, ca. April 1971. Oh, yeah, and my ‘73.

 

Regards,

 

Steve

 

635B0CD6-3A68-4541-A20B-652C2533845C.thumb.jpeg.6b5b9b8fdd9031e9393c316adb089c57.jpeg&key=761fc9a0028469fdad126d3fa1bffa9a6a2e0a46a0f8a199b280f6d4ed392c31

48C2C34D-A222-4780-A85F-FCA57703D79C.thumb.jpeg.e6b6b11df516f123bc3c001082607736.jpeg&key=6fe600c9559ae6199d8b94d16302817276533bfe81343046f1bcbacbe6bee440

1D31826B-D06E-4B02-982D-1608FD91C358.jpeg.799c7bf367602d87891cd48c20c03194.jpeg&key=794feba0c60800864702282c080819f8403890f87902aa71adc902ae6362a8ba

E1188908-132A-45B0-A25C-D3B8D21A67B0.thumb.jpeg.fb3ccd4478515ffa0fb368b41210592e.jpeg&key=806abd916bfcc8782e8c058e46986112279a89b97b683f9a7b729fe71c3aa591

FYI, Cadmium is toxic so you will be hard pressed to find anyone that still plates this material, maybe a supplier to the military. The color of zinc plating is from a conversion coating that is added after plating. It used to come in 4 colors; clear (blue), yellow, olive drab and black. However, I have recently seen red.

 

 

Sent from my iPhone using Tapatalk

  • Like 1

Share this post


Link to post
Share on other sites
14 minutes ago, rockyford77 said:

FYI, Cadmium is toxic so you will be hard pressed to find anyone that still plates this material, maybe a supplier to the military.

 

+1

 

That is my experience, as well, but a number of forum members report that they have found cadmium platers willing to do “hobby batches”.

 

Regards,

 

Steve

Share this post


Link to post
Share on other sites

….Thanks guys. FYI  you can get yellow cad from Imperial Plating in NJ 2 years ago ….it was going for $270/batch...as in nuts and bolts,etc in one box. 

Edited by Mike A

Share this post


Link to post
Share on other sites
On 10/4/2018 at 7:54 PM, Mike A said:

….Thanks guys. FYI  you can get yellow cad from Imperial Plating in NJ 2 years ago ….it was going for $270/batch...as in nuts and bolts,etc in one box. 

 

Ouch! That’s exactly twice what I paid at Metal Finishers of Atlanta for yellow zinc! But at least cadmium remains available.

 

Regards,

 

Steve

 

Edited by Conserv

Share this post


Link to post
Share on other sites

If you want to stick with original, the brake calipers were nekkid cast iron...no paint, no plating, so they developed a layer of rust on the boat coming from Germany.  You could wire brush the exterior, and clean it thoroughly with solvent, then spray with a matte finish clearcoat to keep 'em from rusting again, but I suspect the clearcoat would have to be renewed regularly due to heat buildup.  

 

The valve cover has a porous finish that's the very devil to keep clean.  Back in the day folks used Simple Green, or even judiciously applied oven cleaner to get the cover clean, but without a clear coat it would just absorb oil and dirt again.  I use carburetor cleaner to get the grunge out of the metal, but it doesn't stay nice looking for very long.  I suppose I should use a matte clearcoat on it, but I'm lazy...

 

mike

Share this post


Link to post
Share on other sites

 like the fuel injection lines"

On ‎10‎/‎5‎/‎2018 at 6:08 PM, mike said:

If you want to stick with original, the brake calipers were nekkid cast iron...no paint, no plating, so they developed a layer of rust on the boat coming from Germany.  You could wire brush the exterior, and clean it thoroughly with solvent, then spray with a matte finish clearcoat to keep 'em from rusting again, but I suspect the clearcoat would have to be renewed regularly due to heat buildup.  

 

The valve cover has a porous finish that's the very devil to keep clean.  Back in the day folks used Simple Green, or even judiciously applied oven cleaner to get the cover clean, but without a clear coat it would just absorb oil and dirt again.  I use carburetor cleaner to get the grunge out of the metal, but it doesn't stay nice looking for very long.  I suppose I should use a matte clearcoat on it, but I'm lazy... 

 

mike

  Have you tried Nayalic from Eastwood. I have used it on the rear cast iron calipers and aluminum hubs and all my original bare shiny steel parts like the fuel injection lines in the 911 engine ... Seems to be working fine. 

72 911S resto sequence   (74).jpg

72 911S resto sequence   (113).jpg

Edited by Mike A
  • Like 1

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now