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2003 XC70 - Brake Booster Pump runs too much

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JLK
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Year and Model: 2003 XC70
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JLK

2003 XC70 - Brake Booster Pump runs too much

Post by JLK » Sat Jan 12, 2019 7:42 pm

I searched the site but could not uncover an answer to this specific question.

I replaced the booster vacuum pump and booster switch as they were burned out. The booster vacuum pump runs but seems to run too much. While I am driving I can hear it. I checked the hoses and they seem fine and can’t uncover a leak. Here is the question. Does this year xc70 have a check valve on the hose that runs from the booster switch back to the boster itself. I searched and found schematics which seem that a check valve is supposed to be on that hose but I cant confirm. This is my sons car that he has at school so I do not know the full service history so not sure if this has been worked on before.

Any thought are appreciated.



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oragex
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Re: 2003 XC70 - Brake Booster Pump runs too much

Post by oragex » Sun Jan 13, 2019 2:54 am

Failed brake booster seal at the pedal



2003 2.4i S60 automatic 125k miles
DIY Volvo repairs videos https://www.youtube.com/playlist?list=P ... s0FSVSOT_c

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