o-ring materials for gasoline and brake fluid ? - Defender Source
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Old April 19th, 2013, 05:26 PM
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Julien Dalbin
05 Tdi 90
Join Date: Mar 2005
Location: Dominican Republic
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o-ring materials for gasoline and brake fluid ?

I'm changing o-rings on V8 injectors and also on ABS pump shuttle valves and pump valves.
I've been thru a few reading about o-rings material and it's more complex than I thought.

Anyone familiar with the subject ?

I guess I'll stay on the safe side and use Buna (NBR) for the gasoline and Ethylene Propylene (EPDM) for the brake fluid.

Thoughts ?

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Old April 23rd, 2013, 03:13 PM
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Matt White
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Join Date: Sep 2003
Location: Fort Collins, CO
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I'll take a stab at this. I'm not an expert but this may help:


Click on the link at the top "General Properties of O-rings". Note mcmaster properties are not the bible, so I usually double check the properties they list.

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