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'99 XC - Need some additional brains here

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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wizechatmgr
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'99 XC - Need some additional brains here

Post by wizechatmgr » Sun Jun 23, 2019 9:13 pm

Let's start out with the basics...

Known issues:
  • Both front spring seats appear to be toast, believe driver's strut bearing/mount is also near death
  • Rear turbo oil return seal is toast and leaking intermittently onto angle gear
  • Surging during braking that appears to be on driver's side - intermittent gentle almost inaudible thump at highway speeds - follows driveline speed increase/decrease
  • PCV likely should be done soon, as well as timing belt
Question:
Could the bad front spring seats be causing the thump at speed and surging at low speed braking? Suspect a warped rotor on driver's side due to previously incorrect tension on passenger's side axle nut (corrected) causing tracs to kick in driver's brake.


Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD - ~177k miles

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Re: '99 XC - Need some additional brains here

Post by Ozark Lee » Wed Jun 26, 2019 8:20 pm

The bad spring seats will always make noise, really at any speed. I would not, however, correlate a surge during braking to them.

I guess I need a more detailed description of that phenomenon to hazard a guess as to where to start. Does it act like the engine actually revs or is it a loss of braking power?

Replacing the turbo oil return line seal on a XC is a real treat but it can be done. I think I actually pulled the passenger side axle and dropped the angle gear to do it on one of mine. On the other one I replaced it before I installed the new motor.

The rotor is super easy. I know there is big debate between Brembo and Zimmerman but I have had acceptable service and life out of the cheap auto parts store versions. Pads are a different story. I normally use Mintex Reds but OEMs are a great option, albeit a dustier one. Most of the auto parts store pads will squeal.

...Lee


'94 850 N/A 5 speed
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
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wizechatmgr
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Re: '99 XC - Need some additional brains here

Post by wizechatmgr » Fri Jun 28, 2019 4:59 pm

Sorry for the late reply,

There is just a tinge of a thump and vibration at speed that correlates with the speed of car movement while driving.

Surging on braking isn't RPM surging but rather it feels like a warped rotor to excess. Feels as if you're pumping the brakes...

I'm wondering if the rotor can get bad enough to cause both...


Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD - ~177k miles

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Re: '99 XC - Need some additional brains here

Post by abscate » Fri Jun 28, 2019 7:23 pm

Have you rolled under and looked at both sides of the rotors?


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Re: '99 XC - Need some additional brains here

Post by wizechatmgr » Fri Jun 28, 2019 11:12 pm

abscate wrote:
Fri Jun 28, 2019 7:23 pm
Have you rolled under and looked at both sides of the rotors?
I likely need to look again. Planning on pulling both off and looking at them with a straight edge to them. My feeling is the driver's side is badly warped.


Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD - ~177k miles

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Re: '99 XC - Need some additional brains here

Post by abscate » Sat Jun 29, 2019 3:08 am

I’ve got two spares in the parts bin. We can probably straightedge them on the car, too.


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Re: '99 XC - Need some additional brains here

Post by wizechatmgr » Fri Jul 05, 2019 7:33 pm

So, turns out I found out part of this issue today while checking tire pressure.

I found a nail in the driver's front, which likely bled the air in the tire down a bit. Tossed some fix a flat in it for the moment and will work on a proper tire repair tomorrow when the local chain opens. Looks like it isn't in the side wall so it should be an easy fix. I'll have them check the passenger's front as well. This would explain some of the issues.

Doesn't fix what I believe to be the rotor. Looking at potentially checking this out next week while I have my mini-mechanics with me.


Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD - ~177k miles

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abscate
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Re: '99 XC - Need some additional brains here

Post by abscate » Sat Jul 06, 2019 3:56 am

Driveway open here but I know I’m a bit far.


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Re: '99 XC - Need some additional brains here

Post by greg850r » Mon Jul 15, 2019 10:56 pm

I wouldn't rule out a tire causing your symptom.


05 Cross Country wagon
99 C70 Convertible
96 850R wagon
96 850T wagon
96 850 GLT 5spd N/A sedan
97 850R 5spd sedan
66 GTO 421SD 4spd
67 GTO 455 T400
02 Powerstroke 4x4
85 Yota 4x4
24' 454 Challenger
07 Softail Custom
02 Sportster Custom
Parts cars not included

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