SwedeSpeed - Volvo Performance Forum banner
1 - 20 of 30 Posts

·
Registered
Joined
·
11 Posts
Discussion Starter · #1 ·
XC90 2006 problem pulling the brakes to the right. The car has been replaced with front brake discs, pads, lower link arms, four-wheel alignment, rear brake pins. The car still pulls right sharply when I brake. What next? The brake test claims the brakes are equal. There are no defects in any joints. :?:
 

·
Registered
Joined
·
11 Posts
Discussion Starter · #3 ·
Yes, i mean control arms, sorry. If I remember correctly Mayle HD control arms. I suspect the failure could be rear brake discs and pads (the caliper piston moves well) or front brake pins, is it possible?
 

·
Registered
Joined
·
3,267 Posts
When I bought my '08 at 92k miles (from a Volvo dealer) in 2015, it had a slight right veer on braking that would recover. This being my second XC90, I did a number of visuals and a whole bunch of my own tests and read a lot and I determined that the cause must be the right rear brake doing something funny, I was convinced of it.

When I took the vehicle in for the complaint under warranty, I asked for their Master Mechanic to have a look. A pair of OE lower control arms and hardware plus an alignment, it drove like new.

For this scenario, it's a shift in the suspension geometry that's triggered by the act of braking, feels like something in the back but it's all in the front.

I don't know your full history but if you used aftermarket lower control arms and especially if you used aftermarket lower control arms with the old hardware, this is the first place you should look.

Good luck in your repair.
 

·
Registered
2008 XC90 3.2
Joined
·
1,365 Posts
If the car was sitting for a week and then you experienced this braking problem, the first thing I would check are the tire pressures to ensure one tire did not have a slow leak.

A few questions:
1. When were all these components changed? How long before the vehicle sat for a week?
2. Why were the rear brake pins replaced? They can be lightly sanded of any grime/corrosion and re-greased.
3. If the front end work was done more recently, did you try to rotate tires. I have seen brake pull due to uneven tire wear from previous old worn suspension.

Other things it could be, like others are suspecting, the control arm bushings could have just broken before parking the vehicle, but not sure if that would cause the "sharp" brake pull. Along the same lines, the ball joint could have an issue since you didn't replace that.

The next step would probably do a visual inspection of the front components to see if there are any obvious signs, like a cracked bushing or leaking balljoint. Hearing how you are suspecting the rear, I am thinking you can tell if the rear is pulling versus the front. My guess would be you don't feel the steering wheel sharply turn on braking. This would again lead to why were the rear caliper pins replaced.

Any additional info on your XC90 and your climate? How many miles, when were the rear brakes changed, state (for climate), maintenance (like brake fluid), and could you define or clarify what brake test you are referring to.
 

·
Registered
Joined
·
11 Posts
Discussion Starter · #9 ·
All joints, suspension arms, tire pressure, brakes are checked, nothing is found. The mechanics do not know how to say no, I'm actually a car mechanic but I have never become the same kind of against my own idea ends well.
Wheel alignment also done.
 

·
Registered
2008 XC90 3.2
Joined
·
1,365 Posts
Why were the rear brake pins changed? Why not do the ball joints when the control arms were replaced because it is standard practice to do so? So there wasn't a brake test, just a visual inspection?

Apparently nothing "they" found does not mean what they looked at is not broken. I am guessing that is why you are here asking for help, but it gets difficult if you do not share information. Video those front control arm bushings while driving in addition while stationary on the ground turning the wheel side to side. See if there is too much movement. Visual inspection on a lift may not reveal control arm bushing issues.

How many miles on the parts before the vehicle sat for a week? How many on the XC90 total? Who installed the parts? Do you hear any noises, grinding, clunking, clicking, or squealing? Does the vehicle drive straight? Are the mechanics Volvo specialists? Anything else you are willing to share?
 

·
Registered
Joined
·
11 Posts
Discussion Starter · #11 ·
The brake pins back I switched because the previous owner had put the pins of copper paste, they did not move lightly. If the front brake does not work properly, for example on the left, in which direction does the braking turn the car, to the right? And what about the same situation behind?
 

·
Registered
Joined
·
11 Posts
Discussion Starter · #12 ·
I'm pretty sure that the problem is due to the fault appeared the brakes the car itself after about a week to use, and before that there were no problems.
 

·
Registered
Joined
·
5,602 Posts
You can try cleaning and lubricating the front brake pins, that's free. It could be a sticking front caliper or a brake hose, but I still think it's the aftermarket control arms.
 

·
Registered
2008 XC90 3.2
Joined
·
1,365 Posts
I'm pretty sure that the problem is due to the fault appeared the brakes the car itself after about a week to use, and before that there were no problems.
If you are certain of the issue even after differing suggestions from multiple XC90 owners' experiences, then I guess you know what to fix. Good luck.

From my experience, diagnosing is a process using information, not an immediate top 2 Google search. The decades of my experience in diagnosing reveals never to assume or think logically. We eliminate good parts logically suspected as bring at fault. Sometimes, things break at the same time a different part was being changed. Sometimes we get bad parts. At times, it was the owner's own handy work that was the cause. Other times, mother nature was to blame. To assume, well, how does the saying go...
 

·
Registered
Joined
·
11 Posts
Discussion Starter · #15 ·
The problem was resolved. The right lower link is ok. The rear rubber at the bottom of the left lower arm is 2-3mm lower than the original. The rubber was able to move in the cavity of the body. The bolt had to be tightened very much and the rubber now stays in place. The problems now disappeared completely.
 

·
Registered
2008 XC90 3.2
Joined
·
1,365 Posts
What link are you talking about? The control arm?

So, it WAS a control arm issue everyone here was suggesting and not a brake issue you were suspecting?
 

·
Registered
Joined
·
2,026 Posts
You need to replace those bolts with the updated ones from Volvo. The posts are a slightly larger diameter. It's just going to happen again, AND they are torque to yield bolts which means if they tightened them "very much" they could be unsafe.
 
1 - 20 of 30 Posts
Top