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Volvo XC 90 Maintenance and Repair

1423 messages,  Last post on Oct 12, 2009 at 10:02 AM

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What is this discussion about? Volvo XC90

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#1364 of 1423
Tire and break ware on Volvo xc90 by rathi60
Jun 15, 2009 (11:46 am)
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Quick update I replaced my 4 tires (GY assurance triple tread), break rotors and pads 50000km and at 60000km service the Tire ware was at - 11/32" . 1/32' for 10000km Brake pads frt 9mm and rear 11mm pads left on them. I live in a big city and my driving ratio is 60% city and 40% hwy.Normal ware and tare for a suv of this size . Things done under warty so far,
1. Break booster
2. frt bearing
3. drive shafts
4. windshield washer motor
5. alarm sensor
#1365 of 1423
Rims are black? by chellgrl
Jun 16, 2009 (5:36 am)
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Has anybody had the problem or know why my rims are continually dirty with what looks like black soot? All 4. I just purchased the car in April, it's a 2008 with 13K miles.... Thanks in advance for your input.
#1366 of 1423
Re: Rims are black? [chellgrl] by qbrozen
Jun 16, 2009 (6:03 am)
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Replying to: chellgrl (Jun 16, 2009 5:36 am)

Brake dust. Very common.
When it is time to replace your pads, you can inquire about types that produce less dust.
#1367 of 1423
Re: Rims are black? [qbrozen] by jonds
Jun 16, 2009 (6:36 am)
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Replying to: qbrozen (Jun 16, 2009 6:03 am)

Just a warning - other brake pad types may not brake as well. I switched to ceramic pads which I was told would greatly reduce the dust/grime. It did, but the braking was TERRIBLE compared to the standard Volvo brake pads. I finally switched back.
 
I'd love to hear how others handle this problem.
#1368 of 1423
Re: Rims are black? [jonds] by qbrozen
Jun 16, 2009 (7:10 am)
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Replying to: jonds (Jun 16, 2009 6:36 am)

Sort of ... "may not" is really the key phrase. I put a set of Hawk HP+ pads on my G35. Not only do they produce less visible dust, but they feel better, too.
 
Notice I said "feel." Because stopping power is not the issue. As long as you can invoke the ABS, the brake pads all stop just as effectively as one another.
#1369 of 1423
Re: Rims are black? [qbrozen] by volvomax
Jun 16, 2009 (1:26 pm)
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Replying to: qbrozen (Jun 16, 2009 7:10 am)

Notice I said "feel." Because stopping power is not the issue. As long as you can invoke the ABS, the brake pads all stop just as effectively as one another.
 
Actually, the right pads CAN make a difference in stopping distance. ABS or no. ABS isn't meant to shorten stopping distance, it is meant to give you steering control in a panic stop.
#1370 of 1423
Re: Rims are black? [volvomax] by qbrozen
Jun 16, 2009 (1:53 pm)
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Replying to: volvomax (Jun 16, 2009 1:26 pm)

ABS kicks in when wheel slip while braking is detected. Wheel slip is caused by a lack of traction by the tires. It has nothing to do with the pads. Different performance pads have been tested numerous times. On their own, they make no real difference in stopping distances.
#1371 of 1423
Re: Rims are black? [qbrozen] by volvomax
Jun 16, 2009 (2:35 pm)
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Replying to: qbrozen (Jun 16, 2009 1:53 pm)

I know what ABS does. You mentioned ABS in this instance. However, different kinds of pads CAN make a difference in brake performance, especially when they get hot.
Different pads handle heat differently. Hot pads don't function as well. This can lead to reduced brake performance and longer stopping distances.
#1372 of 1423
Re: Rims are black? [volvomax] by qbrozen
Jun 17, 2009 (10:24 am)
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Replying to: volvomax (Jun 16, 2009 2:35 pm)

Yes, you're right, brake fade can be an issue. But since we're talking about the XC90 and not a track car, its not something we need to worry about on these vehicles. UNLESS the person does alot of towing through mountains. I could see that being an issue.
 
by the way, if anyone is interested in a pretty good article on this sort of thing:
http://www.modified.com/roadtests/0710_sccp_project_acura_rsx_type_s_brake_test/- - - index.html
#1373 of 1423
Re: Rims are black? [qbrozen] by jonds
Jun 17, 2009 (1:09 pm)
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Replying to: qbrozen (Jun 17, 2009 10:24 am)

I'm not talking hypotheticals when I say that my braking performance was terrible with the ceramic pads (from Monroe). I had to press the brake pedal VERY hard to slow the car from highway speeds - to the point of it being dangerous. When I brought it to Volvo they said that the ceramic pads were glazed due to the heat produced in braking, so they didn't grab well. I don't know if this is typical of all ceramic pads, but do know that there was a VERY significant difference in braking with the standard Volvo pads and the ceramic ones I got from Monroe.
 
As noted, ABS won't make a difference, since ABS doesn't kick in until you lock up the brakes, which was hard to do in my situation with the ceramic pads.
 
But back to the original question - anyone have any other ideas for keeping wheels clean?? ;^)

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