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| PDXBob |
Mar 4 2023, 07:14 PM
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#1
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Member ![]() ![]() Group: Members Posts: 61 Joined: 16-May 20 From: Portland Oregon Member No.: 24,272 Region Association: Pacific Northwest
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Hi All,
I just finished putting on rebuilt rear brake calipers done by PMB. Also, new braided steel brake lines and set of new Textar pads on all 4 wheels (1975 914). I took it out to do the “bedding” break-in process and I noticed it was pulling to the right. So, (after doing cool down slow driving)when I got home I checked temperature of rotors. Both back rotors were about 125 degrees. However front right was about 240 degrees. BUT front left was only about 85 degrees. To a novice like me seems like front left is not working. Any suggestions on diagnostic procedures or what to check out. Thanks PDXBob |
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| PDXBob |
Apr 4 2023, 09:36 PM
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#2
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Member ![]() ![]() Group: Members Posts: 61 Joined: 16-May 20 From: Portland Oregon Member No.: 24,272 Region Association: Pacific Northwest
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So, an update:
Had my front calipers just rebuilt by PMB. This solved my problem with pulling to the right. However I still don’t have good brakes, i.e., pedal goes nearly to floor before the car stops. Can’t come close to locking up wheels. So far, I’ve had front and back calipers rebuilt by PMB. Also, replaced rubber brake lines with PMB braided steel. Bought 4 new Textar pads. Adjusted (vented) the back brakes to within specs. I have a Motive Pressure Bleeder and have bleed brakes using it at least 3 times. Just today did the 2-person brake bleed procedure on back brakes. Will do 2-person brake bleed of front’s tomorrow. Master cylinder only about 3 years old. I’ve pumped about 2 quarts of fluid through system and each time get pure, clean fluid and virtually no air bubbles. I’m Running out of ideas on what else to do. Any thoughts or wild-a$$ guesses greatly appreciated. PDXBob (1975 914) |
| rjames |
Apr 5 2023, 05:00 AM
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#3
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I'm made of metal ![]() ![]() ![]() ![]() Group: Members Posts: 4,403 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest
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So, an update: Had my front calipers just rebuilt by PMB. This solved my problem with pulling to the right. However I still don’t have good brakes, i.e., pedal goes nearly to floor before the car stops. Can’t come close to locking up wheels. So far, I’ve had front and back calipers rebuilt by PMB. Also, replaced rubber brake lines with PMB braided steel. Bought 4 new Textar pads. Adjusted (vented) the back brakes to within specs. I have a Motive Pressure Bleeder and have bleed brakes using it at least 3 times. Just today did the 2-person brake bleed procedure on back brakes. Will do 2-person brake bleed of front’s tomorrow. Master cylinder only about 3 years old. I’ve pumped about 2 quarts of fluid through system and each time get pure, clean fluid and virtually no air bubbles. I’m Running out of ideas on what else to do. Any thoughts or wild-a$$ guesses greatly appreciated. PDXBob (1975 914) Virtually no air bubbles isn't good enough. You need to bleed them until all of the air is out of the system. Try the long hose method (bonus, only 1 person is needed). I couldn't get mine properly bled until I switch to speed bleeders. Good luck! |
PDXBob Front Brake Issue Mar 4 2023, 07:14 PM
bkrantz I would jack up the front and have an assistant gr... Mar 4 2023, 09:20 PM
ndfrigi When you bled the left front, does it push brake f... Mar 4 2023, 09:22 PM
PDXBob Good suggestions about bleeding again and spinning... Mar 4 2023, 11:15 PM
Krieger Recheck the venting clearance again on your rear c... Mar 4 2023, 11:36 PM
PatMc Make sure you're bleeding from the uppermost b... Mar 6 2023, 07:50 AM
Eric_Shea Hey Bob,
Are the soft lines new? If not then I w... Mar 6 2023, 09:15 AM
PDXBob
Hey Bob,
Are the soft lines new? If not then I ... Mar 7 2023, 04:40 PM
Eric_Shea
[quote name='Eric_Shea' post='3062899' date='Mar ... Mar 8 2023, 01:33 PM
technicalninja Rear brakes are damn hard to get hot enough to ... Mar 8 2023, 12:34 AM
Cairo94507 @Eric_Shea - Holly molly- 10 year unconditional w... Mar 8 2023, 05:11 PM
Eric_Shea Thank you Amigo! Mar 8 2023, 06:57 PM
PDXBob So, after performing several of the tests listed a... Mar 22 2023, 03:28 PM
930cabman
So, after performing several of the tests listed ... Mar 23 2023, 05:53 AM
PDXBob
[quote name='PDXBob' post='3069725' date='Apr 4 2... Apr 5 2023, 02:08 PM
technicalninja The rear adjustment can be difficult to gauge.
Jus... Apr 4 2023, 09:49 PM
emerygt350
The rear adjustment can be difficult to gauge.
Ju... Apr 6 2023, 04:21 PM
Olympic 914 Just ran through this myself.
Adjusted rear brak... Apr 5 2023, 07:02 AM
Superhawk996 Raise the rear of the car to help move air through... Apr 5 2023, 07:31 AM
brubou I would start at the beginning of the system. Thro... Apr 5 2023, 10:03 AM
rhodyguy Long hose=speed bleeders in the top caliper bleede... Apr 5 2023, 02:27 PM
PDXBob
Long hose=speed bleeders in the top caliper bleed... Apr 5 2023, 04:01 PM
brubou Correct, there is a one way valve mechanism in the... Apr 5 2023, 04:14 PM
rjames When I had my brakes refurbished they came with re... Apr 5 2023, 04:23 PM
rhodyguy You will see the bubbles traveling thru the tube w... Apr 5 2023, 04:25 PM
76-914 I run the hose all the way to the reservoir. That ... Apr 5 2023, 05:51 PM
rhodyguy Return to reservoir….I’m going to get new long... Apr 5 2023, 05:57 PM
emerygt350 Interesting. How do you seal the line at the blee... Apr 5 2023, 06:31 PM
rhodyguy You get tubing that’s a snug fit. The fluid is n... Apr 5 2023, 08:11 PM
emerygt350 I figured if you are running it all the way back i... Apr 6 2023, 06:09 AM
rjames
I figured if you are running it all the way back ... Apr 6 2023, 12:51 PM
PDXBob I’m going to try the long hose bleeding method s... Apr 6 2023, 06:17 PM
emerygt350 I am not there yet. I have been bleeding crappy o... Apr 6 2023, 07:08 PM![]() ![]() |
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