Thread: brake question
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Old 10-29-2019   #7
spork2367
 
Join Date: Jun 2013
Location: PA
Posts: 879
Default Re: brake question

Quote:
Originally Posted by Hib Halverson View Post
"Thomas ZR-1", are you able to offer some facts to support the statement that DOT4 and DOT5 brake fluids are "chemical (sic) more aggressive" such that they cause swelling of rubber seals?

Also, DOT5 fluid is silicone-based and is an excellent choice for old "non-ABS" classic cars where preventing corrosion inside the brake system is the prime concern and braking performance is secondary.

DO NOT use DOT5 silicon-based brake fluid in any vehicle with ABS. The viscosity of DOT5 fluids is incompatible with the rapid fluid movement required for an ABS to operate properly.
And the seals in braking systems haven’t changed material composition since 1990 when these cars were built.
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