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105577 Posts in 12329 Topics by 4753 Members
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1  Camaro Research Group Discussion / Maintenance / Re: 5460346 master cylinder brass seat source on: February 09, 2013, 04:24:23 PM
Thanks for the plug, Mike!
2  Camaro Research Group Discussion / Restoration / 1970 GM 1233464 Metering Valve Rebuild on: February 04, 2013, 04:57:57 PM
I just posted an article that describes how to rebuild the 1970 GM 1233464 metering valve using a new seal kit that I produce. Here's the article:

https://www.musclecarresearch.com/gm-1233464-rebuild

Please let me know if any part of the process is unclear or could be explained better. The rebuild kit is available for $12 plus shipping per kit:

https://www.musclecarresearch.com/gm-metering-seal-kit-2

Orders can be placed directly from my web site. Just add the item to your shopping cart and click through the "Checkout" links. Payment methods accepted include PayPal, credit cards, checks, and money orders.

Please note that the kit DOES NOT include a replacement for the Bendix rubber dust cap. I'm still exploring my options to see if it can be done economically.
3  Camaro Research Group Discussion / General Discussion / Re: Dragging Rear Brakes. Pressure Reg or Metering Valve? on: December 23, 2012, 07:08:24 AM
I couldn't find the thread on the rebuilding of the pressure regulator valve (I don't think there is one yet) but I have found this by Scott Hollenbeck (username here is sah62)
 https://www.musclecarresearch.com/kh-multi-prop-valve-autopsy

I know of one Wagner proportioning valve used on Fords that can cause the rear brakes to drag if the internal piston doesn't move freely. I've never heard of that happening with this K-H valve, but I imagine it's possible. As noted above, removing the internal piston to bypass the proportioning function will confirm if the valve is the problem or not.
4  Camaro Research Group Discussion / Restoration / Re: 1970 GM 1233464 Metering Valve Disassembly on: December 09, 2012, 06:57:21 PM
Thanks! Does it list specific models? My Chevy parts manual says all 1970 with front disk brakes. My Olds manual says 1970 F85, but strangely enough it doesn't mention the Cutlass or other models. I don't have manuals for Buick and Pontiac.
5  Camaro Research Group Discussion / Restoration / 1970 GM 1233464 Metering Valve Disassembly on: December 09, 2012, 05:08:46 PM
Thanks to a little help from someone at Brake & Equipment Warehouse in Minneapolis I finally figured out how to disassemble the 1970 1233464 metering valve. I just posted an article describing the process:

https://www.musclecarresearch.com/gm-1233464-autopsy

I'm working on a seal kit so it can be rebuilt. Does anyone know of any other cars that used this valve in addition to the Chevy and Olds applications?
6  Camaro Research Group Discussion / Restoration / Re: GM 3905525 Metering Valve Disassembly and Rebuild on: November 25, 2012, 03:34:11 PM
Has anyone ever seen one of these valves that didn't use a u-cup seal where the end of the spool valve rod comes through the valve body? I recently heard from someone who found such a valve on a '69 Malibu. The body wasn't machined for a seal - picture attached.
7  Camaro Research Group Discussion / Restoration / Re: 67 Hold Off valve finish on: September 06, 2012, 08:19:36 PM
You're welcome, Mike! With respect to reproducing the finish, take a look at this article on my site:

https://www.musclecarresearch.com/rust-removal

Products like Evapo-Rust seem to leave a grey phosphate-like coating on treated parts. I haven't tried soaking parts that aren't very rusty (like the fitting in your pics above), but it might be worth experimenting to see if you can reproduce the finish that way. If it doesn't work you can buy manganese phosphate concentrate from companies like Palmetto Enterprises:

http://www.palmettoenterprises.net/Palmetto_Enterprises/-Welcome-.html
8  Camaro Research Group Discussion / Restoration / Re: GM 3905525 Metering Valve Disassembly and Rebuild on: September 02, 2012, 07:05:32 AM
Glad to help, Mike. I'll have your items in the mail on Tuesday when the USPS gets back to work.
9  Camaro Research Group Discussion / Restoration / Re: GM 3905525 Metering Valve Disassembly and Rebuild on: September 01, 2012, 05:35:25 PM
OK, then here's a link to the kit:

https://www.musclecarresearch.com/gm-metering-seal-kit-1

$9 plus shipping.
10  Camaro Research Group Discussion / Restoration / Re: Volunteer for Brake Metering Valve Restoration Research? on: September 01, 2012, 02:43:06 PM
It has taken me a while, but I've been able to come up with a rebuild kit for the valve that costs quite a bit less that the $30 kit mentioned above. I just posted the details describing how the valve can be disassembled and rebuilt here:

http://www.camaros.org/forum/index.php?topic=9955.0

What's the best way to post a "for sale" ad? I don't see forums for classifieds.
11  Camaro Research Group Discussion / Restoration / GM 3905525 Metering Valve Disassembly and Rebuild on: September 01, 2012, 02:36:58 PM
I've just completed disassembly and rebuild articles for the GM 3905525 metering valve made by Bendix for 1967 - 1969 GM vehicles. I've also got a new seal kit available that I'll post in the classifieds. Here's the disassembly article:

https://www.musclecarresearch.com/gm-3905525-autopsy

The rebuild article:

https://www.musclecarresearch.com/gm-3905525-rebuild

I don't yet have a reproduction of the Bendix rubber dust cap. I'm exploring my options to see if it can be done economically.
12  Camaro Research Group Discussion / Restoration / Re: GM Brake Pressure Differential Switches? on: December 29, 2011, 09:59:03 PM
Thanks, John.  My Chevy parts book also lists some 1975 applications, so I guess they were used from 1967 - 1975. I've seen a few of these valves with two different types of electrical contact terminals. One has a visible black plastic insulator, and the other is steel with an "internal" white plastic insulator. Do you have any thoughts on the rationale behind the different terminals? I'm wondering because they used different o-ring seals. I can provide both, but I don't understand why the two types were used.
13  Camaro Research Group Discussion / Restoration / GM Brake Pressure Differential Switches? on: December 28, 2011, 05:58:21 PM
I'm working on the parts needed to rebuild GM pressure differential switches like the one in the attached picture. I could use some help in figuring out the original applications, though. Can anyone explain the applications for these parts? Were they used on both disk/drum and drum brake cars? I've read that they were used from 1967 - 1974, is that correct?
14  Camaro Research Group Discussion / Restoration / Re: Volunteer for Brake Metering Valve Restoration Research? on: August 09, 2011, 07:01:23 PM
Contact Dannystarr on this site. He has several.

Will do - thanks for the clue!

30 bucks for 3 pieces of rubber.  I'm in the wrong business.

I'd like to think I can do better than that.  It might even be possible to do a better job of reproducing the rubber cap, but if a custom shape is required the costs go up.
15  Camaro Research Group Discussion / Restoration / Re: Volunteer for Brake Metering Valve Restoration Research? on: August 07, 2011, 07:10:56 PM
I haven't found any rebuild kits anywhere.  Can you point me to them?  I didn't see anything on the Karps web site, but if someone is already making them it may not be worth my time unless I can produce something at a better price.

The closest thing I've found is this:

http://cgi.ebay.com/ebaymotors/280594281134

and it's for the brass Bendix combo valve.
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