 Silcone brake fluid, I'm changing back to DOT 4 |
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| 914zim |
 Sep 7 2003, 09:17 PM
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#1
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Still pretty clueless...  Group: Members Posts: 221 Joined: 29-July 03 From: New Berlin, WI Member No.: 962  |
Hey guys:
While draining the old brake fluid in my 914 (it's been sitting for 4 years), I noticed someone had put a label on the fluid reservior that reads "SILICONE FLUID ONLY" So, I assume a PO had put silicone brake fluid in the system. After I've rebuilt the calipers and replaced the pads, I will be putting regular DOT 4 Heavy Duty brake fluid in. This is the stuff I got from the local parts supply store. I drained the old fluid about 2 days ago and it's been sitting empty since. So, my question is: So I need to do anything special like flush the system with anything (alchohol?) before I put the new DOT 4 fluid in when I bleed the system? Thanks in advance for any help! Andy... |
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| Brad Roberts |
Sep 7 2003, 11:59 PM
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#2
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Just keep bleeding them with the new fluid and flush the system completely. When you think you are done bleeding them... bleed them again.
B |
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| Air_Cooled_Nut |
Sep 8 2003, 11:05 AM
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#3
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914 Ronin - 914 owner who lost his 914club.com Group: Members Posts: 1,748 Joined: 19-April 03 From: Beaverton, Oregon Member No.: 584 Region Association: None |
Curious, why don't you continue to use the DOT 5? I run it in my VW and motorcycle...Jetta is next when it comes time for her maintenance.
http://www.icbm.org/erkson/ttt/silicone.txt and http://www.icbm.org/erkson/ttt/DOT-5_clean_up.txt |
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| seanery |
Sep 8 2003, 11:09 AM
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#4
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waiting to rebuild whitey! Group: Retired Admin Posts: 15,854 Joined: 7-January 03 From: Indy Member No.: 100 Region Association: None |
which one is less caustic?
that's the one i'd probably use. |
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| Air_Cooled_Nut |
Sep 8 2003, 11:11 AM
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#5
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914 Ronin - 914 owner who lost his 914club.com Group: Members Posts: 1,748 Joined: 19-April 03 From: Beaverton, Oregon Member No.: 584 Region Association: None |
Well, DOT 5 will NOT hurt your paint but it's not biodegradable.
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| HarveyH |
Sep 8 2003, 11:22 AM
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#6
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Member Group: Members Posts: 450 Joined: 19-June 03 From: Downingtown, PA Member No.: 843 |
It's been eight or ten years since I used silicone fluid, and they may have changed it, but back then, it was significantly more compressible than glycol based brake fluid.
Good points: doesn't absorb water, so little or no corrosion in the system, and I think a higher boiling point. Bad points: longer brake pedal travel, softer brakes. Harvey |
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| Rusty |
Sep 8 2003, 01:39 PM
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#7
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Wanted: Engine case GA003709 Group: Admin Posts: 7,941 Joined: 24-December 02 From: North Alabama Member No.: 6 Region Association: Galt's Gulch 
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Am I behind the times and the only one still using DOT3?
-Rusty (IMG:style_emoticons/default/smoke.gif) (Uhhh, I think I'm using 3.) |
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| Air_Cooled_Nut |
Sep 8 2003, 11:08 PM
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#8
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914 Ronin - 914 owner who lost his 914club.com Group: Members Posts: 1,748 Joined: 19-April 03 From: Beaverton, Oregon Member No.: 584 Region Association: None |
It does have a higher boiling point. I don't think it is more compressable -- my setups feel tight.
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