[2001 V70 2.4T] Oscillating humming noise when driving

Post by **MoVolvos** » 22 Jul 2019, 19:44

prwood wrote: 22 Jul 2019, 19:07
abscate wrote: 22 Jul 2019, 16:28 That’s the right one. You replace it as a unit, correct, the bearing does not come out separately.

If it’s noisy on RIGHT turn, it s the LEFT bearing that’s bad.
Should I replace both the left and right hubs, or just the side that seems to be worse? Just wondering if it's one of those things that should be done symmetrically.

There is no recommendation to replace both. At those miles, for the price and while everything is up it wouldn't hurt.

DrDan · Post by **DrDan** » 22 Jul 2019, 23:50

We bought our car at 60k miles with a failing front left wheel bearing. The right one still is fine after 60k more. I would leave the other in until it fails.
I guess in legislations where you drive right, turning right happens more frequently which puts more load/stress on the left front bearing, causing it to fail earlier.

Post by **abscate** » 23 Jul 2019, 06:11

There is very little labor overlap so doing the other bearing should wait, especially since they aren’t cheap.
You could think about it if you were doing a suspension refresh or something like that.

If Erik chimes in about how he has never replaced a bearing on his fleet, just ignore him.

It’s probably our salt and slush that kills them, I’ve done three,

Post by **prwood** » 23 Jul 2019, 07:08

It makes sense that the front left bearing would be the first to go, what with all the right turns, and the fact that the driver is usually the only passenger in this car except on family trips with long highway drives.

Post by **prwood** » 26 Jul 2019, 07:01

The replacement hub assembly kit is arriving today - includes hub bolts, axle bolt, and axle shaft seal: https://www.fcpeuro.com/products/volvo- ... it-fag-kit

I'm planning to do the work tomorrow. I have the procedure from VIDA. This is my first time working with the hub and axle. Any tips beyond what is in the procedure?

Post by **abscate** » 26 Jul 2019, 13:02

Remember to crack the axle nut while the car is still on the ground.

You need a good hold on the hub to crack off the four hub bolts

Dont be surprised if the replacement hub bolts are different (hex vs External torx) than the OEM

Post by **prwood** » 26 Jul 2019, 14:22

abscate wrote: 26 Jul 2019, 13:02 Remember to crack the axle nut while the car is still on the ground.

Fascinating, this is the third different way I've seen to remove the axle bolt. The other two were:
- VIDA method, use a screwdriver in the brake rotor as a counterhold.
- 1A Auto instructional video, remove brake rotor, but reinsert two wheel lugs into the hub and use them to counterhold with a pry bar

Post by **abscate** » 26 Jul 2019, 14:25

prwood wrote: 26 Jul 2019, 14:22
abscate wrote: 26 Jul 2019, 13:02 Remember to crack the axle nut while the car is still on the ground.
Fascinating, this is the third different way I've seen to remove the axle bolt. The other two were:
- VIDA method, use a screwdriver in the brake rotor as a counterhold.
- 1A Auto instructional video, remove brake rotor, but reinsert two wheel lugs into the hub and use them to counterhold with a pry bar

You do need either a deep socket or a 1/2 inch extender to reach in but the P2 Axle bolt is an M8 14mm hex unlike the 36mm on the P80s, so it is in everyones kit