Considering the water I have seen accumulate in relatively short times - I think I will stick to straight DOT 4. Thanks, John On 12/30/2013 10:37 PM, Dennis Haynes wrote: > To begin with those boiling points are for "wet" fluid. In other words > saturated with water which would also mean it has been in use way too long. > Next, if you do get the fluid in the calipers near that hot your are also > already in trouble. I have seen the effects of bad or overheated brake fluid > causing loss of pedal. But seriously, the Dot 4 is higher performance > standard and the fluids are interchangeable. Dot 5 is an even higher > standard but it is usually silicon based instead of glycol so those cannot > be mixed. A quart is enough to flush the system even with the manual > transmissions with the clutch. > > Dennis > > -----Original Message----- > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of > JRodgers > Sent: Monday, December 30, 2013 11:12 PM > To: vanagon@GERRY.VANAGON.COM > Subject: Break Fluid - DOT 3 vs DOT 3/4 Vs DOT 4 > > Dot 3 = Boil point 280 > Dot 3/4 = Boil Point 480 > Dot 4 = Boil Point 512 > > In looking at Brake Fluids tonight - "ol Red needs a refill - I found these > numbers. > > The shelves were full of DOT 3 and 3/4 but only one little can of Dot 4 > - And I wanted a 32 oz container at least. > > Question: Would the Dot3/4 be safe for use in the Vanagon. I'm suspicious of > it - but there are copious amounts available. But the boil point is 32 > degrees below the DOT 4. > > Comments? > > Thanks, > > John > |
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