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09-07-2015, 01:29 PM
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#1 |
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Registered User
Join Date: Aug 2010
Location: Southern CA
Posts: 1,622
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Dual master cylinder fluid?
Anyone using anything special in their dual master/clutch cylinders? Just went to top mine off and realized I never gave it a second thought before... What's the best fluid to use?
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09-07-2015, 01:47 PM
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#2 |
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Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,226
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Re: Dual master cylinder fluid?
Dot 3 brake fluid.
K
__________________
Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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09-07-2015, 04:56 PM
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#3 |
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Registered User
 
Join Date: Mar 2013
Location: Southern Oregon
Posts: 10,384
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Re: Dual master cylinder fluid?
Second that on DOT 3.
__________________
1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw |
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09-09-2015, 01:06 PM
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#4 |
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Registered User
Join Date: Feb 2012
Location: pleasant valley--placerville ca
Posts: 3,039
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Re: Dual master cylinder fluid?
the only difference between dot 3 & 4 is 4 has a higher boiling point.
__________________
1961 chevy K10 my build is------------61K10 build |
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09-09-2015, 02:37 PM
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#5 |
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Registered User
Join Date: Aug 2010
Location: Southern CA
Posts: 1,622
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Re: Dual master cylinder fluid?
Yeah I remember reading a debate about this a few years ago, but I couldn't find my way back to the thread. Someone was arguing for using Dot 5 fluid but I didn't recall the reason. Higher temp makes sense. This is a reg duty truck so I'll stay with Dot 3. Thanks
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09-10-2015, 10:58 AM
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#6 |
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Registered User
  
Join Date: Apr 2012
Location: Wisconsin
Posts: 3,329
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Re: Dual master cylinder fluid?
a good read http://www.gomog.com/allmorgan/brakefluids.html
__________________
IS IT an EATON or Chevrolet rear axle https://67-72chevytrucks.com/vboard/...d.php?t=843778 The hubcap thread http://67-72chevytrucks.com/vboard/s...d.php?t=702839 WANTED : 1963-1966 6 Cylinder Fan Shroud WANTED :1964-1966 PANEL TRUCK |
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09-10-2015, 12:29 PM
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#7 | |
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Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,226
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Re: Dual master cylinder fluid?
Quote:
a) Silicone fluid does not mix with conventional fluids, so you have to flush the whole thing out. b) General Motors would recommend that you rebuild, replacing any seals AND HOSES that had been in contact with the previous conventional fluid c) I have had bad experiences with Dot 5 (failed master cylinders on a regular basis). Going back to Dot 3 eliminated those problems. K
__________________
Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ Last edited by Keith Seymore; 09-22-2015 at 02:26 PM. |
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