North American Turbocoupe Organization



Clutch master cylinder
Dustin8990 Offline
Junior Member
#1
Anyone know where I can find a clutch master cylinder?
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vegas_ss Offline
Senior Member
#2
Rockauto shows AMS AUTOMOTIVE M0781 as the part which is out of stock... google search found this one and may be more.  No idea about the vender though.

Clutch Master
1987 TC, 5sp, Boport Stage 3 Head/2.1 Cam
1996 Impala SS, DCM, Borla Cat Back, too much other stuff!!! (SOLD)
2009 Pontiac G8 GXP 6M, 6.2l LS3, Kooks Long Tube, Hi Flo Cats, Mild Cam
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spittinfire Offline
Member
#3
Rock auto had them in stock for a long time and I was going to buy one just for a spare but it seems that they've dried up. It's not surprising because the 87/88 master cylinder only works on Turbo Coupes, a 35 year old limited production car.
I talked to a guy that adapted a C5 master cylinder to his car and according to him it was nearly bold in. They install with the same 1/4 turn twist lock but had to open the hole up in the firewall plate a little and I think he had to extend the rod. Some of the aftermarket C5 master cylinders have an adjustable rod which would help but they aren't cheap. The C5 master is a 15/16" bore which would help if you're running a heavier clutch, I've always found 3/4" to be marginal in getting performance clutches to release.

I've thought about taking one apart to see if I could source seals for it because unless the bore is worn pretty bad you should be able to rebuild them. It's a 3/4" bore master so there has to be seals available that would work.
Mikey97D likes this post
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vegas_ss Offline
Senior Member
#4
(05-19-2023, 12:03 PM)spittinfire Wrote: Some of the aftermarket C5 master cylinders have an adjustable rod which would help but they aren't cheap.  The C5 master is a 15/16" bore which would help if you're running a heavier clutch, I've always found 3/4" to be marginal in getting performance clutches to release. 

I've thought about taking one apart to see if I could source seals for it because unless the bore is worn pretty bad you should be able to rebuild them.  It's a 3/4" bore master so there has to be seals available that would work.

For aftermarket adjustable clutch master cylinders, check Tick Performance, they may have something in the C5/LS realm that could work but they are $$$

Tick Performance
1987 TC, 5sp, Boport Stage 3 Head/2.1 Cam
1996 Impala SS, DCM, Borla Cat Back, too much other stuff!!! (SOLD)
2009 Pontiac G8 GXP 6M, 6.2l LS3, Kooks Long Tube, Hi Flo Cats, Mild Cam
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spittinfire Offline
Member
#5
(05-19-2023, 03:40 PM)vegas_ss Wrote:
(05-19-2023, 12:03 PM)spittinfire Wrote: Some of the aftermarket C5 master cylinders have an adjustable rod which would help but they aren't cheap.  The C5 master is a 15/16" bore which would help if you're running a heavier clutch, I've always found 3/4" to be marginal in getting performance clutches to release. 

I've thought about taking one apart to see if I could source seals for it because unless the bore is worn pretty bad you should be able to rebuild them.  It's a 3/4" bore master so there has to be seals available that would work.

For aftermarket adjustable clutch master cylinders, check Tick Performance, they may have something in the C5/LS realm that could work but they are $$$

Tick Performance

Yeah, I've seen it but that's a bit more then I wanted to spend.  I have a good master cylinder on my car that I replaced less than a year ago but would like a spare. I'm also planning on changing the car to a V8 clutch and running a Ram hydraulic throw-out bearing and I would prefer the 13/16" bore.  I've thought about just going to the parts store and getting a stock replacement for a C5, cutting the end off the rod and threading the rod so I could make it adjustable.
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BradM Offline
Member
#6
I see alot of these master cylinders on eBay for under $40. https://www.ebay.com/itm/153479522212?fi...BMgumUlodi
1965 Mercury Comet Caliente; 1968 Mercury Monterey; 1969 F100 Ranger; 1982 Mustang; 1987 Thunderbird Turbo Coupe; 2017 Police Interceptor
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spittinfire Offline
Member
#7
(05-20-2023, 01:41 PM)BradM Wrote: I see alot of these master cylinders on eBay for under $40. https://www.ebay.com/itm/153479522212?fi...BMgumUlodi

That's a slave cylinder.
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BradM Offline
Member
#8
Arrrr, sorry. Clicked on the wrong link. Yes, it's the slave. I bought both a few years ago. (the master is Wagner F116378). Here's a half dozen part numbers that cross and may pop up somewhere, someday. https://www.yoyopart.com/oem/11039471/wa...16378.html
1965 Mercury Comet Caliente; 1968 Mercury Monterey; 1969 F100 Ranger; 1982 Mustang; 1987 Thunderbird Turbo Coupe; 2017 Police Interceptor
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spittinfire Offline
Member
#9
I got the Wagner master from Rock Auto about a year ago, maybe a little longer. I've searched every part number on that list and couldn't find anything. I have a friend who is a manager at Advance Auto and ask him to see if he could find anything in his spare time and he couldn't find a single one in their network.
I'm thinking about setting something up on ebay to notify me if any of those part numbers are listed and hope that someone out there will have one they want to sell.
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BradM Offline
Member
#10
My Wagner was NOS on eBay. Agree, set up an eBay alert.
1965 Mercury Comet Caliente; 1968 Mercury Monterey; 1969 F100 Ranger; 1982 Mustang; 1987 Thunderbird Turbo Coupe; 2017 Police Interceptor
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