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Old 07-09-2016, 09:40 AM   #1
JIMs70GMC
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Join Date: Jun 2001
Location: Chesapeake, Virginia
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brake reservoir leaking

My brake reservoir leaks at the cap gasket on my 83. I have the JB7 brake system. I did replace the MC last year and now it still leaks at the gasket. What could be putting the reservoir under so much pressure? MC bad or maybe wrong MC? not really sure how to check. Any help is appreciated.
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1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs
1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX
1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears
1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now.....
1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone.
1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed.

1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm
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Old 07-09-2016, 11:03 AM   #2
Gregski
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Re: brake reservoir leaking

fluid too high?

not sure exactly, but sometimes even new parts are bad, I went through 3 power steering pumps before settling on one I liked (ie that didn't leak)
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Old 07-09-2016, 02:42 PM   #3
JIMs70GMC
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Re: brake reservoir leaking

I replaced the top gasket, I will keep an eye on it. Fluid is 1/4" from the top maybe lower. When i checked yesterday it was about 1" below.
__________________
1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs
1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX
1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears
1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now.....
1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone.
1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed.

1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm
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Old 07-11-2016, 06:38 PM   #4
gwcrim
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Re: brake reservoir leaking

I had the same problem. I took the latch spring holder thingy off and bent is so it is tighter. That was over the weekend. Haven't checked it yet to see if it's fixed.
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Old 07-14-2016, 01:54 PM   #5
JIMs70GMC
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Location: Chesapeake, Virginia
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Re: brake reservoir leaking

Quote:
Originally Posted by gwcrim View Post
I had the same problem. I took the latch spring holder thingy off and bent is so it is tighter. That was over the weekend. Haven't checked it yet to see if it's fixed.
I might do that, I remember needing a screw drive to pry them off, this one I can do easily with my hand.
__________________
1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs
1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX
1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears
1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now.....
1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone.
1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed.

1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm
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