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Joined: Jul 2018
Posts: 169 Likes: 2
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Jul 2018
Posts: 169 Likes: 2 |
Hello All,
I usually post with questions about my 51 but now I'm helping a friend with his 63 409/425 car. I'm going to re-plate the master cylinder cap (the rest is going to White Post for sleeving and rebuilding). I need some help with the plating finish type.
1. Is the cap itself plain cadmium/zinc? Or is it also yellow dichromate over the zinc?
2. Is the thumb screw also plated or is it just bare steel?
3. There is another piece under the thumb screw, like a formed washer, that has some evidence that it was yellow dichromate. Is that how it should be? Or was it also just zinc/cad?
I can do all the plating and dichromate wash myself but I want to do it with the correct original type plating.
As always, any help is greatly appreciated.
Jeff
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Willwood Engineering
Wilwood Engineering designs and manufactures high-performance disc brake systems.
Wilwood Engineering, Inc. - 4700 Calle Bolero - Camarillo, CA 93012 - (805) 388-1188
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Joined: Dec 2001
Posts: 2,119 Likes: 1
ChatMaster - 2,000
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ChatMaster - 2,000
Joined: Dec 2001
Posts: 2,119 Likes: 1 |
The cap is zinc or silver cad as well as the washer the thumb screw is natural steel.
John
John
1954 Belair Sport Coupe
1960 2 door Impala Hardtop 348/340HP 4spd
1962 2 door Impala Hardtop 409/409 4spd
1962 2 Door Biscayne Sedan 327/250 Auto
1977 Monza Mirage 305 4 Speed
1988 Celebrity Wagon
2018 GMC Sierra 2500 HD Diesel
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Joined: Jul 2018
Posts: 169 Likes: 2
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Jul 2018
Posts: 169 Likes: 2 |
John,
Thanks for the response. That is what I was thinking.
Jeff
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Joined: Dec 2001
Posts: 2,119 Likes: 1
ChatMaster - 2,000
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ChatMaster - 2,000
Joined: Dec 2001
Posts: 2,119 Likes: 1 |
Jeff
The problem is finding a good cover without any pits for plating. If you can find a Corvair in a salvage yard that has an original master cylinder, they use the same cap and are usually protected much better, and make a great core for the cap
Good luck
John
John
1954 Belair Sport Coupe
1960 2 door Impala Hardtop 348/340HP 4spd
1962 2 door Impala Hardtop 409/409 4spd
1962 2 Door Biscayne Sedan 327/250 Auto
1977 Monza Mirage 305 4 Speed
1988 Celebrity Wagon
2018 GMC Sierra 2500 HD Diesel
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