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I have had the brakes done on my 740 turbo wagon TWICE in the last year (pads and rotors) and they feel like they are frozen. The car has to fight to accelerate, and today on the freeway it got harder and harder to maintain speed; eventually I could only go 30mph and that was with the engine really screaming. I smelled burning; all 4 wheels were really hot. I went to a shady place to cool off (me and my car) and decided that maybe cooling them off with water would either damage them beyond repair or get me back on the highway. I went to a carwash, and it did the trick! Now I have to figure out if my mechanic messed up,and get him to replace them AGAIN, or go to a new guy and take the $$ loss. Any suggestions, especially theories on what went wrong? I do love my Volvo...
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Here's another outside the box thought of something that might affect all four wheels and them all getting hot: a bad master cyl cap. Could be allowing air in one way to build up pressure during braking, but venting out extremely slowly, like overnight. Quick way to find out would be to open the cap while the brakes are still stiff after a run.
I'm also wondering if the brakes have been so badly neglected that the pistons are totally grunged up and not retracting properly. If the pads are dragging, the rotor would soon heat up and expand causing even more drag until the brakes are noticeably slowing the car and the hubs are royally hot. When the brakes are cold, if you jack up the wheels, just how much drag is there when you hand turn the wheels and is it more or less equal side to side, if indeed you can even hand turn the wheels?
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Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now
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What do you mean you "had the brakes done?"
Merely new pads and rotors? Twice in one year?
What color is the brake fluid in the brake fluid reservoir? Black as anything?
Can you service it yourself or no?
Find a new shop or repair service:
- https://www.brickboard.com/SHOPS/
- https://www.volvomechanics.com/
- https://www.cartalk.com/mechanics-files
"I do love my Volvo..."
No you do not.
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Donate NOW! Give your brickboard.com a big DONATION!!! Find the ![]("https://www.paypal.com/en_US/i/btn/btn_donate_SM.gif") on brickboard pages!
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"Any suggestions, especially theories on what went wrong?"
This is uncommon to happen to all 4 brakes. So I'll offer an uncommon theory - I suspect the brake fluid is full of moisture. Even normal braking efforts during driving could easily boil the fluid causing all brakes to drag. Combine this with internal rust within the brake bores then things could get worse easily.
Amarin.
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Have you changed the booster or master cylinder?
Does the problem get worse as you drive further?
Have you read the FAQ?
If the measurements between the MC and booster aren't correct, or the pushrod length is too long, heat in the system can cause the brakes to drag worse and worse as you drive.
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This is the old lady who was accused of being a troll because I apparently post unusual problems about my Volvo. Months have gone by with no recurrance of the locked up brakes, and then it happened again. Seems to occur after a lot of stop and go traffic... my mechanic doesn't seem to have a clue, and I have had all the hoses replaced. Another mechanic says he can't do anything unless the problem is happening right then. I think it might be a caliper, but nobody seems to want to go with that diagnosis although they are happy to replace them and charge me for it even if that isn't the problem. MC is full, color is clear amber. Am I just dealing with an inexperienced mechanic or the usual misogynistic bs women usually get? Would love some assistance on this, and please, no more troll accusations!
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I just read your initial problem post where you said all four wheels are getting hot. Is that still the case?
What parts have been replaced or otherwise messed with? Master cylinder? Booster? Pedal rod?
Does your 1988 have ABS? I don't know if it was available in 1988, but if so then maybe it's acting up???
Once the brakes start to lock up does the pedal feel different?
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Thanks for your prompt reply! To answer some of your questions, I don’t
think it has ABS, and I’m checking with mechanic about booster and push rod
replacements. On the last dragging episode I noticed only the rear hubs
were hot, and yes, the brake pedal definitely felt different- very hard
resistance felt. The MC has not been replaced; it always looks full and the
color is clear amber.
Mechanic just texted that he didn’t replace booster or push rods
Thanks again for your help.
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Were the rear brake hoses ever replaced?
Also it could be that the rear calipers were replaced with some cheaply rebuilds that don’t have properly fitting pistons. 740s came with like three different piston sizes that were only a couple mm’s different in diameter.
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Your rubber lines going to your brake calipers are No Good ! Old and swelled inside. When you push the brakes fluid goes through but slowly build pressure in the caliper that can not return. The more you push the brakes the tighter they become. Sitting awhile allows the pressure to relax,careful heating up the brakes. The heat can destroy/thin the wheel bearing grease if done too many times. 1988 is awhile ago. New rubber lines all around.
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What year? Does the car have ABS?
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82 242-6.2L; '17 Mazda3; '16 Crosstrek
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Ask the PO about his other 25 Volvos with unusual problems. He has more Volvos than the rest of the state combined.
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Keeping it running is better than buying new
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Are you suggesting something that begins with a T? :)
His profile shows an Autaugaville, Alabama address with a 95814 (West Coast - Sacramento) zip code. Sounds like a legitimate address to me. Does he keep Volvos in both Alabama and California? Ha-ha-ha
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take it bak to the mechanic that did the work,,,Make him fix it,,
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Frances Lindsay
free lance artist
Sacramento, California
Arts and Crafts
https://www.linkedin.com/in/frances-lindsay-3466b477
???
--
Donate NOW! Give your brickboard.com a big DONATION!!! Find the on brickboard pages!
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Hi Kitty. How did you come up with a name for the PO? And Sacramento, CA is not close to Pacifica, CA.
Also strange that the PO changed the profile from Autaguaville, AL to Pacifica in order to match the zip code.
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Keeping it running is better than buying new
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To kittysgreyvolvo: Why would you post my personal info on this site, and accuse me of not loving my Volvo? All I was trying to do was find an answer to a braking problem that I have on my car. What gives you the right to decide I am a troll and post my information online? Keep your brownshirt judgements to yourself!
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I provided you info on how to find a repair service.
Indeed, you are being misled at the least. Them Bay Area hourly labor rates are extraordinary.
Sorry to do so. No brown shirts. Blue and white shirts only. Usually golf shirts. Yet now flannel. Much flannel! Too much eggnog!
If I resided near you I'd stop by with tools and take a look. 1988 700 series brakes are as easy as 240. Yet the single piston Bendix caliper being what they are!
If the calipers are seized again, there have been issue with the cheapo rebuilt brake calipers so I read.
I've also found service mechanics raised on newer ABS systems do not understand the redundant dual brake system used on your 1988 740 and my two non ABS 240s.
Yet what is at issue with the repair service places you are using is unknown other than what you relate.
Sorry you have to deal with this.
Gravy Boyeeeee.
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Jonathan Harshman Winters III: The Mightiest, Greatest, & Most Powerful North American Comedian & Comedic Actor in Perpetuity
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I wondered if Klaus meant OP not PO.
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Art Benstein near Baltimore
PO = previous owner
OP = original poster
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Dyslexic fingers. OP. You should watch me when I am upside down and backwards under the car trying to figure out which way the oil drain plug is supposed to turn! I also can't spell!
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Keeping it running is better than buying new
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On first read, Klaus, I pictured you knew something about a notorious used volvo-seller, a curbstoner, or mechanic who sold to Volvere one of many lemons he wouldn't stand behind (or in this case, in front of). Most of my errors come from not reading carefully, rather than not interpreting correctly.
My slippers have an L and an R on them.
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Art Benstein near Baltimore
A dyslexic man walks into a bra.
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When I come across a really strange post, I always check to see the profile.
This person has a problem and I have seen him on other makes sites. Different town. Same mechanic.
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Keeping it running is better than buying new
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I assumed OP. I’ve noticed before that Volvere posts strange problems. Can you say Tr*** ?
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Will I buy another Volvo??? We'll see....
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But, but, but... Why?
I mean, it used to happen in the Opinions section, but here in the tech forums, these days? Surely there ain't no one that has nothing better to do. Especially when they bothered to fill in the "LABEL(S) +" to their post.
That said, Kudos to Klaus for always being the person to call them out. The rest of us are either to kind or too naive to do it!
All the best,
Will
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