 How likely my rear brake line is leaking?, brake fluid in the channel and under drivers seat |
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| boxster914 |
 Oct 10 2020, 09:28 PM
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Member  Group: Members Posts: 74 Joined: 17-September 20 From: NC, USA Member No.: 24,700 Region Association: South East States  |
Long story short: my brake pedal went to the floor, I noticed the rear fluid reservoir was dry and my drivers side floor pan full of brake fluid.
After doing some research here at 914world I decided that the master cylinder died and it needed replacing. During the install of the PMB 19mm master cylinder (oh what a pain that was but thank you again to 914world in helping me seat the supply lines) I saw that there was brake fluid under the drivers seat. This was strange because there is a ridge separating the front and rear sections of the floorpan so I couldn't figure out how the fluid would have collected under the drivers seat. A little more looking and I see that it is wet in the channel with a deep puddle of it settled at the rear firewall. So the fluid leaked from the hole in the channel into the pan area under the drivers seat. So now I'm putting this all together: -rear reservoir compartment dry (supplies the rear brakes) -lots of brake fluid in the channel It seems that the fluid is leaking from the brake line that runs in the channel and not necessarily the master cylinder failing. What is your take on this mystery? If it is the rear brake line that needs replacing how the heck do you do that? |
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| Mikey914 |
Oct 11 2020, 12:02 AM
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The rubber man Group: Members Posts: 12,669 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None 
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Post up some pics it may help
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| Garland |
Oct 11 2020, 12:18 AM
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Restoration Fanatic Group: Members Posts: 1,329 Joined: 8-January 04 From: ......Michigan...... Member No.: 1,535 Region Association: Upper MidWest
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The brake line that’s in the channel has a union. It’s accessible under the access plate at the rear of the channel, it’s a small plate with one Phillips screw, close to the firewall. This is also the location to adjust your shifter linkage.
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| cary |
Oct 11 2020, 09:32 PM
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Advanced Member Group: Members Posts: 3,900 Joined: 26-January 04 From: Sherwood Oregon Member No.: 1,608 Region Association: Pacific Northwest
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| bdstone914 |
Oct 12 2020, 09:35 AM
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bdstone914 Group: Members Posts: 4,522 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
@boxster914
I doubt your tunnel brake line is leaking. Judgeing from a picture you posted with the car on ramps with nose high I bet the fluid came from the master cylinder and ran to the back. You could test the line for leaks by pressurizing it with a hand pump like a Mighty Vac. |
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| mepstein |
Oct 12 2020, 10:12 AM
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914-6 GT in waiting Group: Members Posts: 19,272 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region
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QUOTE(bdstone914 @ Oct 12 2020, 11:35 AM)  @boxster914 I doubt your tunnel brake line is leaking. Judgeing from a picture you posted with the car on ramps with nose high I bet the fluid came from the master cylinder and ran to the back. You could test the line for leaks by pressurizing it with a hand pump like a Mighty Vac. That would make sense. The metal channel that separates the front and back pan is spot welded so fluid may leak underneath. Or maybe down the center tunnel. Especially if you raised the front end first. |
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