CRG Discussion Forum
Camaro Research Group Discussion => Restoration => Topic started by: jeff68 on February 23, 2011, 04:53:40 PM
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I have been looking into having some parts for my restoration plated. For example, the alternator fan & pulley.
From what I can find, it seems that the finish should be silver cadmium or silver zinc. The problem is that these 2 finished look very different. I have had assorted small parts silver cad plated, and the finish is dull looking compared to zinc plating. Therefore, I would think that these 2 finishes are not interchangeable from a "correctness" standpoint.
So, what is the correct silver colored plating to use on parts like the alt. fan & pulley, coil bracket, etc.?
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Check out this link. I had mine done and they look great. I used this Zinc finish for coil, alt. pulley and fan. I also had my jack shaft done.
http://brakeboosters.com/cz.htm
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If I go with zinc, I was planning on sending my parts to Steve.
I'm still wondering what the factory correct finish is - cad or zinc. I may just end up going with zinc, because Steve can also provide all the other finishes I need.
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If I go with zinc, I was planning on sending my parts to Steve.
I'm still wondering what the factory correct finish is - cad or zinc. I may just end up going with zinc, because Steve can also provide all the other finishes I need.
Almost all 60's plated parts showed the option of either zinc or cad on the drawings; cad was much more expensive than zinc, and it's doubtful that any supplier chose the cost of cad plating when they had to match prices with other suppliers that used zinc. Cadmium became recognized as a skin-contact carcinogen and heavy-metal disposal problem in the 70's, was eliminated from virtually all automotive applications, and about the only applications today where it's still used are on aircraft.
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^^Thanks John. Makes sense. I'll go with the zinc plating.
Like I said, I have had other misc. parts cad plated, but the quality has been hit-or-miss and it is expensive.
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Hi Jeff did you go with zinc? how did it turn out? are you happy with the color or the coating?
thanks
sebastien
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From what I have seen - Original plating was clear zinc. Sometimes called silver zinc.
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Hi Jeff did you go with zinc? how did it turn out? are you happy with the color or the coating?
thanks
sebastien
Sebastien, this was a 4 plus year old thread and have not seen Jeff68 on lately but here goes. Clear Zinc is the way to go but be warned clear zinc can be everything from very dull to very shiny depending on the platter and what you show them you want or their experience concerning restoring our type of car parts. Plus, like an paint job, the end product is only as good as the prep prior to plating. If a part is pitted or rough prior to plating its going to look awful after plating as well. I'd suggest showing the platter what you want unless you went with the experience of Brakeboosters.com, or similar. Some parts like the coil bracket and body plugs seemed to be hot galvanized so not everything utilized clear zinc.
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He has my dust shields and brake soft line clips. Always like Christmas when the parts come back :D
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he being Steve ,brakeboosters.
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Sebastien, this was a 4 plus year old thread and have not seen Jeff68 on lately...
My apologies to the CRG community for taking a little hiatus. My father, who bought my Camaro new, recently passed away at age 86. Luckily, he got to see the restoration completed, but I just needed to take a break from Camaro stuff for a while.
I think I'm ready to come back...
My Dad in the driver's seat, 45 years after buying the car:
(I'll be putting the correct P01 wheel covers on this spring)
(http://i79.photobucket.com/albums/j126/jac04/CamaroNov22013A_zps2a2c1b17.jpg)
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We are all very sorry for your loss, Jeff!
On the positive side, he lived a good long life.. even enjoyed ownership of a Camaro convertible when it was new, and for you to have that car now... provides you some fantastic memories.. and on top of that? TO have that photograph with him in it after restoration!~ Many of us would give much to have similar... :)
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^^ Thank you.
Yes, he led a long life, and enjoyed 27 years of retirement!! I consider myself very lucky.
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^^ Thank you.
Yes, he led a long life, and enjoyed 27 years of retirement!! I consider myself very lucky.
Glad to see you back Jeff and I can only wish to have 27 years of retirement. Your Father was blessed and as Gary commented to have that picture, well that is just memorable!
Welcome back!
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Welcome back Jeff! Beautiful restoration! :)
Paul
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Welcome back Jeff. Very sorry for your loss. My dad is gone 20 years already. He drove every car I ever owned. He was a cop for 40 years and never took a sick day. 2 weeks after working his last he died of a massive heart attack. Sounds like your dad had a wonderful life. The pic of him in his camaro is priceless!
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Thanks everyone for the warm welcome back. I appreciate it.
When I asked Dad if he wanted to drive the car again, he said "I already drove it 160,000 miles, I think I know what it's like." Then, he thought about it a little more and got into the driver's seat. We had made a joint decision to replace the shifter with an old US-made NOS Hurst unit I found, and he wanted to see what it was like. The car wasn't running. Left hand on the wheel, right hand on the shifter, he was able to snick it through a couple of gears and said "Wow, that's nice ... maybe I'll try driving it..." Then he tried pressing the clutch pedal and said "now I remember that clutch ..." and that was that.
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:) at 86, if we live that long, I doubt any of us will spend much time looking forward to our next drive and 'power shifting'... :)
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Steve at Brake Boosters just received my original brake booster, proportioning valve bracket, and master cylinder lid for the Zink Dichromate (Gold Iridite) plating, and my original front disc brake back plate spatter shields for Clear Zinc silver plating. I was impressed that he calls you when he receives your shipment to discuss your parts and to ask you specific questions to verify exactly the work you want done. He has been in this restoration business for a long time and knows what to look for and how to properly prep your parts before plating. I was concerned about the prep as I had to sand and polish pits from the front cover of the brake booster and the PV bracket. He will glass bead blast the polish parts so they do not have an incorrect mirror finish once they are plated.
Steve will sand and polish your pitted parts for an additional labor charge which may be worth it. If you do not have experience with sanding and polish pits from parts, there is a bit of skilled and proper tools needed to prevent from damaging your original parts. The process can also be labor intensive.
I'll post pics once I get the parts back.
Jerry MacNeish also does great work restoring these brake system componets.
Dave
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Back from Brake Boosters, next to go out are the proportioning valve and metering block. Sort of interesting the difference between the R and L stamping. This is what was once under all the black tar and paint. Then hood release , z bar , hinges...
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My booster from CHP:
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looks good, Steve still has my booster. I'm looking forward to see it.
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Reminds me ,need to get a few items out to him next week.
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The round valve under the MC is a metering/hold off valve, the proportioning valve is located on the subframe. There is then the distribution block. The hold-off valve can be rebuilt by a car owner and it is an easy job. Not sure if a rebuild kit is offered for the proportioning valve yet. This has been on this site before:
https://www.musclecarresearch.com/gm-3905525-rebuild
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The round valve under the MC is a metering/hold off valve, the proportioning valve is located on the subframe. There is then the distribution block. The hold-off valve can be rebuilt by a car owner and it is an easy job. Not sure if a rebuild kit is offered for the proportioning valve yet. This has been on this site before:
https://www.musclecarresearch.com/gm-3905525-rebuild
The metering/hold off valves nut is phosphate for a 68 (oh how I found that out LOL) as a reminder and maybe I've missed something but what prompted the coating on the three soft brake line clips as all originals I've looked at including mine were phosphate. Parts looking very nice! :)
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The round valve under the MC is a metering/hold off valve, the proportioning valve is located on the subframe. There is then the distribution block. The hold-off valve can be rebuilt by a car owner and it is an easy job. Not sure if a rebuild kit is offered for the proportioning valve yet. This has been on this site before:
https://www.musclecarresearch.com/gm-3905525-rebuild
Hard to find, but it is there.
https://www.musclecarresearch.com/2B091-Kit-2
https://www.musclecarresearch.com/valve-rebuild-kh-multi-prop
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Chic, actually spoke with Steve about that nut in October.
Thought I may have seen some gold on the clips, which were entombed in tar. Honestly ,just my preference.
Hold off/metering sometimes refereed to as proportional valve:
What's called out as the proportional valve on the Drivers' side sub frame is not on my car. Rear brakes fed off a single line which extends into the engine compartment. From what I've read about this part it appeared in 67 , D/c'd on Norwood Camaro's mid 68, then reappeared.
The hold off valve does control/regulate pressure between the two systems allowing fronts to grab before rears ,as it should ( 75% braking in the front I believe was the number) A sort of early attempt at anti lock brakes to paraphrase an article I read awhile back.
Here is probably the reason for the alias. And the system worked....stopping never was an issue with my car.
All that aside ,parts going out to Brakeboosters next week because they look sooo good restored!
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Probably should start a different thread, but will theses different valves work together, and is there a correlation between nut size and sub frame valve? ( I should be mowing my yard)
I never had issues with the rears locking up ,of course I never drove it in the rain or snow ,so can't comment on performance in those conditions.
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Valves and there purpose have been discussed here ad nauseum. The hold-pff valve does what it's name impies: it stops flow to the calipers until the valve reaches 30-40 PSI. It does not make the front discs operate before the rear drum brakes. Do a search on this site about the valves and all the data can be found.
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Valves and there purpose have been discussed here ad nauseum. The hold-pff valve does what it's name impies: it stops flow to the calipers until the valve reaches 30-40 PSI. It does not make the front discs operate before the rear drum brakes. Do a search on this site about the valves and all the data can be found.
Hey real sorry to set you off..
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There IS a great explanatory article by John Z on the brake components in the CRG Reports section...
http://www.camaros.org/brakevalve.shtml
It has pictures, so even I can understand it.. :)
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Was not set off at all. Just stating that the info is here for anyone who wants to know more about it. And thanks to John Z for posting valve terminology clarifications and function numerous times in different threads.
Hey real sorry to set you off..