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2007 XC70 (P2) - Excessive Vibrations Under Acceleration Topic is solved

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive P2 platform cars sold as model years 2001-2007 (North American market year designations).

2001 - 2007 V70
2001 - 2004 V70 XC (Cross Country)
2004 - 2007 XC70 (Cross Country)
2001 - 2009 S60
2003 - 2007 S60 R
2004 - 2007 V70 R

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vtl
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Re: 2007 XC70 (P2) - Excessive Vibrations Under Acceleration

Post by vtl »

jonesg wrote: 18 Dec 2025, 09:07
vtl wrote: 18 Dec 2025, 05:55 Get yourself an induction heater, there won't be such thing as frozen bolt anymore.
which induction heater do you have, I've been after one for a while but most have bad reviews on amazon,
typical they work a few times then dead.
https://www.amazon.com/dp/B0DD7HY3ZB?th=1

cmayo1
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Post by cmayo1 »

Post control arm replacement update: The mechanic showed me both control arms and they were junk. The ball joints were digging into their seat, and the rubber bushings were so loose it was almost like it was designed to be like that. He put it in a vice and spun it like a top!

He also said we were missing a bolt for the ball joint passenger side, and an axle bolt on the driver's side. Yikes! Lastly, he said the engine mounts look fine, along with the CV axles (besides a tear in the boot), but he also said there's really no way to tell if the axles are bad or not. Is that true?

I'm glad I got the work done, because now I go down the road and don't feel like something is about to fall off. Gotta put the fiancé in the car; I'm okay with me going out with a bang, but not her.

Unfortunately, it's still got the shakes. This time, it actually seems less likely to happen, but only by about 10%. There was one segment of road i remember accelerating through and it didn't shake violently, but it's still there, intensity the same. I'm going to have to see if there's a specific RPM range in which it is worse now that the control arms are replaced. It does not pull in any direction while accelerating or after accelerating.

I feel more confident doing the CV axles rather than doing the control arms. I had a feeling that the control arms were going to be similar to the wheel bearings I did last year. Seeing this crustiness gives me nightmares.

So we're thinking CV axle? Is there truly "no way to tell"? Around the same time last year, I was told it was the rack itself. Still not the idea?
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2007 Volvo XC70

free time ≠ money

cmayo1
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Post by cmayo1 »

jonesg wrote: 18 Dec 2025, 09:07 Get yourself an induction heater, there won't be such thing as frozen bolt anymore.
I would do this, but I'm not near an outlet when I'm working on my clunker. I do have my trusty torch!
2007 Volvo XC70

free time ≠ money

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jonesg
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Post by jonesg »

my CV's have never gone bad but my understanding is they start to click in slow speed turns.
I would consider replacing the boot.

to pull the axle you need to disconnect the ball joint so the knuckle can swing outward.
Its not much different than doing the control arms. You still need a big pry bar and S hook to pull the control arm down at the ball joint.

The reason the axle bolt went awol is its a single use stretch bolt, something like 36 ft lbs then 90 degs.
If you do this order a couple of new axle bolts, they about $4 from FCP.
But I woudn't touch it til spring.


cmayo1
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Post by cmayo1 »

Oh to have a warm garage and a lift...

I've heard the same thing about the clicking, but I've also heard that for sway bar links (which I'm sure are junk too). I'll have to listen and hope that I hear it only on one side and not the other.

Boot will be taped up for the winter and replaced in the spring. Do I'm right to believe everyone that anything but the GKN axles are junk? Is it worth looking to see if a junk yard has any?
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cmayo1
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Post by cmayo1 »

Also, we're not thinking steering rack, right? Got a diagnosis over a year ago saying it was bad (he never mentioned the control arms or wheel bearings, went straight for the rack).
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DavidE7
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Post by DavidE7 »

My friend purchased an induction heater based on feedback from a local import repair shop he uses. This induction heater is more expensive than the other ones listed on Amazon but it is extremely durable:
https://a.co/d/bMFtYVD
It works extremely easily and saved me from broken brake bleed nuts and several suspension parts that were located next to rubber parts that couldn't be heated safely with a torch.
David E
2001 Moondust V70 2.4 293,000 miles
2001 Nautic Blue V70 2.4 224,000 miles
2004 Nautic Blue XC70 2.5T 251,000 miles
new: 2004 Black Saphire V70R 193,000 miles
2007 Titanium S60 2.5T 275,000 miles
2007 Magic Blue S60 2.5T 233,000 miles
2007 Silver V70 2.4 200,000 miles
P2 Volvos for every person in my family

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jonesg
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Post by jonesg »

cmayo1 wrote: 20 Dec 2025, 19:56 Oh to have a warm garage and a lift...

I've heard the same thing about the clicking, but I've also heard that for sway bar links (which I'm sure are junk too). I'll have to listen and hope that I hear it only on one side and not the other.

Boot will be taped up for the winter and replaced in the spring. Do I'm right to believe everyone that anything but the GKN axles are junk? Is it worth looking to see if a junk yard has any?
end links usually click at low speeds over small bumps.
sounds like yours is from something rotating, could be something as simple as an out of balance wheel.
you could try rotating front wheels to back.
if youre in south NH theres a big pick n pull in N. Billerica with lots of volvos. Hollands salvage.

i have a garage a lift and a heater and i'm still not going out there.

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jonesg
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Post by jonesg »

DavidE7 wrote: 20 Dec 2025, 20:37 My friend purchased an induction heater based on feedback from a local import repair shop he uses. This induction heater is more expensive than the other ones listed on Amazon but it is extremely durable:
https://a.co/d/bMFtYVD
It works extremely easily and saved me from broken brake bleed nuts and several suspension parts that were located next to rubber parts that couldn't be heated safely with a torch.
too rich for me but i'd buy it if i wrenched for a living.

cmayo1
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Post by cmayo1 »

jonesg wrote: 21 Dec 2025, 07:40 end links usually click at low speeds over small bumps.
sounds like yours is from something rotating, could be something as simple as an out of balance wheel.
you could try rotating front wheels to back.
if youre in south NH theres a big pick n pull in N. Billerica with lots of volvos. Hollands salvage.

i have a garage a lift and a heater and i'm still not going out there.
I've had wheels balanced back in July, and just put a different set on them last weekend and still the same issue. I've seen Hollands Salavge on car-part.com, truthfully just afraid of something falling ontop of me while I'm under it (horror stories from my father). I should go there and look before making a decision. I'm near Jean Guy's, but they usually charge 25% more than most people.
2007 Volvo XC70

free time ≠ money

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