 No brakes!, Brake pedal went to the floor |
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| mburkhart |
 Sep 8 2020, 08:44 AM
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#1
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Member  Group: Members Posts: 113 Joined: 3-July 05 From: Chester, MD Member No.: 4,364 Region Association: MidAtlantic Region  |
So I was out for a cruise around the neighborhood the other day and things were going great until the brake pedal went to the floor. I was able to pump it a few times and restore pressure and crawled home in a low gear. Each time I used the brakes the pedal would go to the floor until I pumped it a few times. Scary!
Once home I looked under the car and inspected the soft lines at each caliper but they looked fine and no leaks. The brake fluid reservoir is still full. I'm not sure where the problem is. What should I be looking for? |
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Replies
| mepstein |
Sep 8 2020, 08:47 AM
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#2
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914-6 GT in waiting Group: Members Posts: 20,625 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region 
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Master cylinder
Look for fluid under the pedal assembly in the car. |
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| DRPHIL914 |
Sep 8 2020, 08:57 AM
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#3
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Dr. Phil Group: Members Posts: 5,909 Joined: 9-December 09 From: Kennesaw, GA Member No.: 11,106 Region Association: South East States
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QUOTE(mepstein @ Sep 8 2020, 10:47 AM)  Master cylinder Look for fluid under the pedal assembly in the car. (IMG:style_emoticons/default/agree.gif) if no leaks at the MC underneath, look under pedals, this just happened to me this year but the last one i had fail i could get some pressure like you did after a few pumps of the pedal but will not maintain pressure, if that is the case you may not have any leaking but just failed seal internally and you still are in need for a new one. one of my least favorite jobs to do Phil |
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| mburkhart |
Sep 8 2020, 09:03 AM
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#4
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Member Group: Members Posts: 113 Joined: 3-July 05 From: Chester, MD Member No.: 4,364 Region Association: MidAtlantic Region |
I haven't had time to lift the car up to be able to easily see what's going on with the master cylinder yet, but I'll check that next.
I did find a really nice youtube video from a member who installed the 19mm master cylinder upgrade from 914rubber. Unfortunately it looks like the "easy install" version isn't available right now. Replacing the master cylinder looked fairly straightforward, what makes it your least favorite job? |
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| DRPHIL914 |
Sep 8 2020, 11:19 AM
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#5
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Dr. Phil Group: Members Posts: 5,909 Joined: 9-December 09 From: Kennesaw, GA Member No.: 11,106 Region Association: South East States
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QUOTE(mburkhart @ Sep 8 2020, 11:03 AM) I haven't had time to lift the car up to be able to easily see what's going on with the master cylinder yet, but I'll check that next. I did find a really nice youtube video from a member who installed the 19mm master cylinder upgrade from 914rubber. Unfortunately it looks like the "easy install" version isn't available right now. Replacing the master cylinder looked fairly straightforward, what makes it your least favorite job? laying on my back with no lift just on jack stands trying get the freaking line pushed into place and to seat- not much room to work, sometimes it goes easy- the last one i did the “easy” install one from 914rubber. still took all day to pull out old one install and bleed lines, etc. i don’t have a power bleeder, pro tip- loosen the reservoir and attach the lines at the mc before bolting it in tight and also bench bleed the mc will help too. don’t forget the washer it’s traditional hose attachment will leak without those washers, i found that out the hard way too |
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| mburkhart |
Sep 8 2020, 02:05 PM
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#6
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Member Group: Members Posts: 113 Joined: 3-July 05 From: Chester, MD Member No.: 4,364 Region Association: MidAtlantic Region |
What are folks thoughts on the original 17mm vs 19mm master cylinders?
Would you guys recommend waiting until the "easy install" 19mm master cylinder becomes available again? Is it really that much easier to install than the non-easy version? Edit: Here's the link - https://914rubber.com/easy-install-19-mm-master-cylinder |
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| ClayPerrine |
Sep 8 2020, 05:33 PM
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#7
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Life's been good to me so far..... Group: Admin Posts: 16,542 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille
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QUOTE(mburkhart @ Sep 8 2020, 03:05 PM) What are folks thoughts on the original 17mm vs 19mm master cylinders? Would you guys recommend waiting until the "easy install" 19mm master cylinder becomes available again? Is it really that much easier to install than the non-easy version? Edit: Here's the link - https://914rubber.com/easy-install-19-mm-master-cylinder IIRC... the 17mm master cylinder is NLA. |
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Posts in this topic
mburkhart No brakes! Sep 8 2020, 08:44 AM
dcheek
What are folks thoughts on the original 17mm vs 1... Sep 9 2020, 09:00 AM fiacra
Master cylinder
Look for fluid under the pedal a... Sep 8 2020, 10:13 AM
brant if the MC leaked on the pedals
make sure you rebui... Sep 8 2020, 09:14 AM solex When was the last time you replaced your brake flu... Sep 8 2020, 09:32 AM 76-914 RE; the non-easy install MC version; You can get a... Sep 8 2020, 02:57 PM mepstein Im pretty sure I have the 19mm easy install versio... Sep 8 2020, 05:47 PM Tdskip Check me on this - the only difference between reg... Sep 9 2020, 06:50 AM mepstein
Check me on this - the only difference between re... Sep 9 2020, 07:38 AM DRPHIL914
Check me on this - the only difference between r... Sep 9 2020, 08:32 AM Optimusglen When I did mine I installed on a bench, just the l... Sep 9 2020, 08:41 AM mepstein Never forget the washers. They are 100% mandatory.... Sep 9 2020, 08:55 AM billh1963 I'll throw out another possibility....
One da... Sep 9 2020, 09:02 AM mburkhart
I'll throw out another possibility....
One d... Sep 9 2020, 09:39 AM VaccaRabite
I'll throw out another possibility....
Anyw... Sep 9 2020, 09:46 AM stugray
I'll throw out another possibility....
One d... Sep 13 2020, 10:29 AM VaccaRabite The difference between the 17mm and the 19mm is on... Sep 9 2020, 09:35 AM mepstein Did you pull the carpet and the pedal plywood and ... Sep 9 2020, 10:36 AM mburkhart
Did you pull the carpet and the pedal plywood and... Sep 9 2020, 11:51 AM mepstein
Did you pull the carpet and the pedal plywood an... Sep 9 2020, 12:33 PM Craigers17 I did this a few months ago. I used this advice b... Sep 9 2020, 01:47 PM mburkhart Well it looks like the caliper is the culprit. Br... Sep 12 2020, 02:57 PM bdstone914 @[url=http://www.914world.com/bbs2/index.php?showu... Sep 12 2020, 06:50 PM stugray
@[url=http://www.914world.com/bbs2/index.php?show... Sep 13 2020, 10:32 AM Mikey914 I know we are making more now and may be able to l... Sep 12 2020, 09:49 PM porschetub As far as failure. If there are not any apparent l... Sep 13 2020, 01:56 PM sixnotfour
Old brake fluid increases the diagnoses.. Sep 13 2020, 12:52 PM |
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