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Master cylinder cap gasket

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MacGyver View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MacGyver Quote  Post ReplyReply Direct Link To This Post Topic: Master cylinder cap gasket
    Posted: Oct/20/2021 at 6:53pm
Where would one find a replacement gasket/seal for the lid of the master cylinder
for a '72 Javelin with manual disc/drum brakes?
 
Mine is looking kinda shabby, and seeps a bit at the front after driving...
 
Really don't want to have to buy a whole new master cylinder just to get the gasket!!
 
But I'll be darned if I can find a source for just the gasket!!
 
Mac.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote sweatlock Quote  Post ReplyReply Direct Link To This Post Posted: Oct/20/2021 at 7:25pm
AMARK has them for $9


Says for power, but I don’t think there’s a difference between the master cylinder for power disc brakes and manual. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MacGyver Quote  Post ReplyReply Direct Link To This Post Posted: Oct/20/2021 at 9:14pm
Fantastic!!   Thank you!!
 
I can't believe in all the searching I did, AMARK never came up!!
 
I did find a lot of results for Ford gaskets that look strikingly similar, but
no way to know if they'd fit properly!!
 
Wonder how much shipping a $9 part to Canada will cost?
I'm betting 3 times the cost of the part!!  Wink
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tomj Quote  Post ReplyReply Direct Link To This Post Posted: Oct/22/2021 at 1:17am
Or find some gasket material, and cut your own. Make a pattern with writing paper etc. Cut carefully. I'm making more and more gaskets myself, it's simply more convenient and works great. I have three or four thicknesses held to a metal cabinet with a magnet so they're flat. Karropak works for most things. I special ordered some thin stuff for oil pumps etc.

1960 Rambler Super two-door wagon, OHV auto
1961 Roadster American, 195.6 OHV, T5
http://www.ramblerLore.com

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Post Options Post Options   Thanks (0) Thanks(0)   Quote madams Quote  Post ReplyReply Direct Link To This Post Posted: Oct/22/2021 at 6:38am
Probably want to stick with the factory style with the bellows rather than make a flat one.  My understanding is the bellows gets sucked in as the brakes wear (and liquid level goes down) so you don't inhale outside air that may contain moisture.  Never really thought about what would happen if the bellows didn't make up for the lost volume of brake fluid?

You might be able to find a cheapo chrome cover locally and just use the gasket?  In the US, Dorman Help products are fairly common.  I have seen master cylinder cover gaskets on the HELP displays but AMC could be a challenge?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tomj Quote  Post ReplyReply Direct Link To This Post Posted: Oct/23/2021 at 12:35am
Oh good point on the bellows.

My older cars don't have 'em, I forgot. 

But if the bellows have rotted away or something it may be that the master cyl is ancient and needs a close look.

1960 Rambler Super two-door wagon, OHV auto
1961 Roadster American, 195.6 OHV, T5
http://www.ramblerLore.com

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Post Options Post Options   Thanks (0) Thanks(0)   Quote MacGyver Quote  Post ReplyReply Direct Link To This Post Posted: Oct/27/2021 at 10:14pm
Thanks for the suggestions, guys!!
 
I had thought about the cheapie chrome cover angle,
but they don't seem to include the gasket/bellows!!
 
After some exhaustive research and a great eBay listing
with some measurements, it seems like early 70's-80's Ford
master cylinders use the exact same part!!
 
So it looks like Dorman #42069 "Help" part should be
an exact match!!
 
Easy to find locally or on Amazon...
Or on my next Rock Auto order....
There's even a review from an Amazon buyer that said it
worked for his '69 AMC!!
 
I'll give one a try!!
 
But the car is now in winter storage...
I'll try to remember to update in 7 months when I get to
see my car again!! Unhappy
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mixed up Quote  Post ReplyReply Direct Link To This Post Posted: Oct/28/2021 at 1:31am
Ford will work
69 amx 290 auto
65 220 290 4spd
80 ford fairmont
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