 Brake Noise When Pushing Car Forward |
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| Miniwerks |
 Sep 2 2023, 05:31 PM
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#1
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Newbie  Group: Members Posts: 25 Joined: 11-March 23 From: Fair Oaks, CA Member No.: 27,219 Region Association: Northern California  |
New to this forum, picked up a very nice Nepal Orange 1976 with under 50k original miles. When I push it backwards in the garage it rolls without resistance, however when pushing it forward I hear the calipers rubbing on the rotors and feel resistance. May need to just drive it more but need to get it registered first. PO did not drive it as it was in his collection with many other Porsches. Other than driving it more, any other possible causes? Seems odd it rolls fine backwards. Looking at service history, PO did have the rear brakes done at 47,421 miles in 2018 and only another 2500 miles since then. Replaced rear calipers, pads and rotors, flushed and bled entire system and adjusted caliper pistons and parking brake.
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| Spoke |
Sep 4 2023, 06:04 PM
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#2
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Jerry Group: Members Posts: 6,986 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None 
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Question about brake pressure: How does one test their brake system if it appears pressure is remaining in the system after the peddle is pressed? Is there a pressure gauge that can be put in place of a caliper to see if after the peddle is pressed the system pressure goes to zero?
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| PatMc |
Sep 4 2023, 08:33 PM
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#3
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Member Group: Members Posts: 120 Joined: 27-June 21 From: Long Beach Member No.: 25,669 Region Association: None
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QUOTE(Spoke @ Sep 4 2023, 07:04 PM)  Question about brake pressure: How does one test their brake system if it appears pressure is remaining in the system after the peddle is pressed? Is there a pressure gauge that can be put in place of a caliper to see if after the peddle is pressed the system pressure goes to zero? If you suspect residual pressure in the system...open a bleed screw and see if the wheel becomes easier to turn...if it does, you have a residual pressure problem. Now go over and try the other side (same end) and see if it also became easier to turn after having loosened the first bleeder.... if it did, then you have an issue with master cylinder holding pressure due to either the pedal not returning all the way, the pistons in the master not returning all the way, or possible contamination that caused the seals in the master to expand. If the other wheel is still dragging, crack the bleeder...if it gets easier, you have constricted hoses. If neither gets easier to turn when you open the bleeders, you have sticking calipers. |
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Posts in this topic
Miniwerks Brake Noise When Pushing Car Forward Sep 2 2023, 05:31 PM
PatMc
New to this forum, picked up a very nice Nepal Or... Sep 2 2023, 05:39 PM
Miniwerks
New to this forum, picked up a very nice Nepal O... Sep 2 2023, 05:44 PM Cairo94507 See, if you can, if the rubber lines that go to th... Sep 2 2023, 06:17 PM Miniwerks Got her up in the air and all brakes are dragging.... Sep 4 2023, 11:33 AM fixer34 ALL wheels or just rears?
If jusr rears, maybe ad... Sep 4 2023, 11:42 AM Cairo94507 Are the rotor faces rusted? I still believe your ... Sep 4 2023, 11:44 AM Miniwerks
Question about brake pressure: How does one test... Sep 6 2023, 09:36 AM bkrantz Also check for a bit of free play in brake pedal m... Sep 4 2023, 07:53 PM Miniwerks
Also check for a bit of free play in brake pedal ... Sep 6 2023, 09:35 AM Dave_Darling It's typical for a car that sits, especially i... Sep 6 2023, 10:50 PM |
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