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Front end shakes after warm up

Help, Advice, Owners' Discussion and DIY Tutorials on the Volvo S80 model. Sometimes called an "executive car", the S80 was and continues to be Volvo's top-of-the-line passenger car.
Mthafukngreen
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Mthafukngreen

Front end shakes after warm up

Post by Mthafukngreen » Thu Feb 20, 2020 3:05 am

First off, my control arms are bad and I'm sure that's playing a big factor. Secondly, my brakes are kinda sticky, that may be another factor.

Anyone got any ideas as to why the shaking only happens after the car reaches operating temperature?
It starts out subtle but the longer I drive after it's warmed up the shaking gets worse and worse. If I park for a 10 minutes or so, I can drive shake-free for about 5 minutes. If I let the car cool down completely, I'm back at square one.

Help lol

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RickHaleParker
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Re: Front end shakes after warm up

Post by RickHaleParker » Thu Feb 20, 2020 11:51 am

Mthafukngreen wrote:
Thu Feb 20, 2020 3:05 am
Secondly, my brakes are kinda sticky, that may be another factor.
Heat

Brakes are energy converters, they convert Kinetic energy into Thermal energy then dump the Thermal energy into their environment. Brake shoes expand when they heat up and would stick even more.
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Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.
Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.
Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
Platform P2 2004 S60R, B2524T4, AW50/51 AWD, Bosch Motronic 7.0, BorgWarner K24 turbocharger, Plant Ghent Belgium.

Mthafukngreen
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Re: Front end shakes after warm up

Post by Mthafukngreen » Thu Feb 20, 2020 12:27 pm

Ok thank you. You confirmed my suspicions.

Cees Klumper
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Re: Front end shakes after warm up

Post by Cees Klumper » Thu Mar 26, 2020 1:36 pm

your brake hoses could be swelled up from the inside due to age (and perhaps bad or old fluid, I am not sure about that one). As you drive and use the brakes, the pads get applied to the discs ok, but because the hoses are constricted, aren't able to retract. If this is your problem, you would have extremely hot brake discs and noticeable drag when up to temperature.

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ndphotonl
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Re: Front end shakes after warm up

Post by ndphotonl » Sat Mar 28, 2020 5:14 pm

Be very cautious with dragging brakes, the rotor will become very hot
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lasseamager
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Re: Front end shakes after warm up

Post by lasseamager » Sat May 16, 2020 12:23 pm

front disc are ....not straight but. yeah you know, and if the brake caliper is bad , it gets MUCH worse when it gets warmed up. replace em SOON, and check the piston and so in your brake caliper ! ....something you should do emiedietly

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