 Brake system flush, Removing silicone fluid |
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| EJP914 |
 Apr 18 2021, 06:06 PM
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#1
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Member  Group: Members Posts: 260 Joined: 14-June 03 From: Monroeville, PA Member No.: 821  |
I am trying to flush out the rest of the silicone fluid installed by previous owner from my brake system with alcohol using one of those pressure bleeder tanks. Have 3 of the lines closed off with old brake lines crimped shut while working on the one open. I am not running the old silicone fluid thru the new calipers. Pump line is attached to brake fluid reservoir. I can pump the tank up to 10 lbs or a bit more and get alcohol running thru the two front lines.
I cant get anything out of the rear lines. Not enough pressure at 10 lbs? Is there something in the brake system that would have closed off fluid flow to the rear brakes. Don't know where to go from here. Would appreciate any suggestions. Thanks. Ed |
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| mb911 |
Apr 21 2021, 10:56 AM
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#2
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914 Guru Group: Members Posts: 6,963 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest 
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Never even knew there was a difference..what brand is silicone brake fluid? Guess I never even looked
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| Racer |
Apr 21 2021, 12:53 PM
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#3
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Senior Member Group: Members Posts: 787 Joined: 25-August 03 From: Northern Virginia Member No.: 1,073 Region Association: MidAtlantic Region |
QUOTE(mb911 @ Apr 21 2021, 12:56 PM)  Never even knew there was a difference..what brand is silicone brake fluid? Guess I never even looked DOT5 is silicone.. Don't confuse with DOT5.1, as that is NOT silicone. DOT 3 and 4 are mainstream brake fluid (not silicone). It was the darling of those who never drove their cars since its shelf life is longer. It was designed /used for applications where moisture is an issue since it does not absorb moisture. Regular brake fluid absorbs moisture which degrades its performance over time. |
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| mb911 |
Apr 21 2021, 05:22 PM
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#4
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914 Guru Group: Members Posts: 6,963 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest
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QUOTE(Racer @ Apr 21 2021, 10:53 AM) QUOTE(mb911 @ Apr 21 2021, 12:56 PM) Never even knew there was a difference..what brand is silicone brake fluid? Guess I never even looked DOT5 is silicone.. Don't confuse with DOT5.1, as that is NOT silicone. DOT 3 and 4 are mainstream brake fluid (not silicone). It was the darling of those who never drove their cars since its shelf life is longer. It was designed /used for applications where moisture is an issue since it does not absorb moisture. Regular brake fluid absorbs moisture which degrades its performance over time. Gotcha never used that ever in my life so all good. |
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Posts in this topic
EJP914 Brake system flush Apr 18 2021, 06:06 PM
iankarr I hate to say it, but if it were me, I'd repla... Apr 18 2021, 11:25 PM GeorgeRud Do they gel up if mixed? Though I’ve long heard... Apr 19 2021, 08:09 AM iankarr Unfortunately yep. Apr 19 2021, 08:14 AM rbzymek Unfortunately there is no solvent for silicone oil... Apr 19 2021, 08:25 AM EJP914 I have not added any DOT 3 or 4 into the system. T... Apr 19 2021, 08:40 AM EJP914 Been doing some reading on this. Seems brake press... Apr 19 2021, 01:41 PM
bbrock
Been doing some reading on this. Seems brake pres... Apr 19 2021, 01:50 PM
iankarr
Been doing some reading on this. Seems brake pres... Apr 21 2021, 10:26 PM bbrock
[quote name='EJP914' post='2909260' date='Apr 19 ... Apr 21 2021, 11:01 PM Stark 01 Not sure why you are not getting fluid in back, bu... Apr 19 2021, 02:41 PM Johny Blackstain I've found that silicone is best for garage qu... Apr 19 2021, 02:55 PM Racer FWIW, when I swapped out silicone for DOT4, I also... Apr 20 2021, 10:01 AM IronHillRestorations I wouldn't use alcohol in your brake system, i... Apr 20 2021, 08:56 PM |
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