GM 3905525 Metering Valve Disassembly and Rebuild

[sah62]

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.

[m22mike]

Outstanding work Scott, I see an order in my future... <<GRAEMLIN_URL>>/biggthumpup.gif

[mockingbird812]

Wow Scott, nicely done! Love your detailed descriptions/instructions and the clear photos. VERY helpful! <<GRAEMLIN_URL>>/biggthumpup.gif

[Donnie]

I placed my order!

[L72Chevelle]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Donnie</div><div class="ubbcode-body">I placed my order! </div></div> X2 Thanks Scott!

[68SSCamaro]

Thanks, perfect timing. I'm just installing a rebuilt power brake booster and master cylinder and the brake lines on my car. Ordered 1 set.

Martin

[dl7265]

Scott,
What a great tutorial. What about the '70 style that does not have the large nut on the end ?
I know Steve Gregori told me he rebuilds them and has the unit phosphate plated while apart.
Thanks,
DL

[sah62]

I wish I knew how Steve is rebuilding those 1970 1233464 valves because I can't see any way to get them open! If there's a way to open it that doesn't require cutting I can probably come up with the parts.

[njsteve]

Great info! Do you offer the parts/o-rings for the other versions of the combination valve? This is the one from my 72 Firebird. There is also a similar cast iron bodied one that does not have the &quot;L&quot; shape.

http://i599.photobucket.com/albums/tt77/nk15268c/SDC11652.jpg

http://i599.photobucket.com/albums/tt77/nk15268c/SDC11651.jpg

[sah62]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: njsteve</div><div class="ubbcode-body">Great info! Do you offer the parts/o-rings for the other versions of the combination valve? This is the one from my 72 Firebird. There is also a similar cast iron bodied one that does not have the &quot;L&quot; shape.</div></div>

I do. I currently have two kits (proportioning and pressure differential) available for the Kelsey-Hayes valve you have pictured. Here's the disassembly article:

https://www.musclecarresearch.com/1979-gm-kh-combo-valve-autopsy

I'm still working on the kit for the metering valve and that's what's holding up a rebuild article. If you can't wait assembly is just the reverse of disassembly. These are the seal kits:

https://www.musclecarresearch.com/kh-iron-combo-kit-1

https://www.musclecarresearch.com/kh-iron-combo-kit-3

I hope to have a kit for the metering valve &quot;soon&quot;.

[sah62]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: dl7265</div><div class="ubbcode-body">Scott,
What a great tutorial. What about the '70 style that does not have the large nut on the end ?
I know Steve Gregori told me he rebuilds them and has the unit phosphate plated while apart.
Thanks,
DL </div></div>

I just started a new thread with a link to an article that describes the disassembly process:

http://www.yenko.net/ubbthreads/ubbthrea...alve#Post509308 (http://www.yenko.net/ubbthreads/ubbthreads.php/topics/509308/1970_GM_1233464_Metering_Valve#Post509308)

[Lynn]

So... while these are apart. What is the correct finish for this and for the proportioning valve?