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Noticeable humming with CV boot replacement

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Noticeable humming with CV boot replacement

Post by 5rivers » Sat May 09, 2020 9:17 am

Greetings all,

This past week I replaced a torn CV boot - front passenger side - and what a PITA that was!!! By far the worst was putting on the large end of the new boot!

Anyway, after putting everything back together, there is a noticeable humming noise coming from that part of the car. I cannot tell if it is coming from the wheel hub or the transmission.

Any recommendations on what I should do :?:

Appreciate any and all replies!

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Re: Noticeable humming with CV boot replacement

Post by crlande » Sat May 09, 2020 9:31 am

Was this a split boot type replacement?

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Re: Noticeable humming with CV boot replacement

Post by 5rivers » Sat May 09, 2020 10:01 am

No, I removed the axle, so I clean out all the old grease, clean the bearings, etc...

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Re: Noticeable humming with CV boot replacement

Post by Richard99 » Sat May 09, 2020 11:09 am

What exactly do you mean by "clean the bearings"?
Eric

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Re: Noticeable humming with CV boot replacement

Post by misha » Sat May 09, 2020 12:31 pm

Did you use proper grease after dismantling and cleaning cv joint?
Did cv joint clicked back onto the shaft(fully home)?
Check if big nut didn't loosened.
Did you have that noise before repair?
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
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'73 144 De Luxe
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'78 244 DL
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Re: Noticeable humming with CV boot replacement

Post by 5rivers » Sat May 09, 2020 2:29 pm

When I removed the axle, I took off the torn boot, removed the race and cage and bearings, and cleaned off all the old grease on those parts. I will post some pics. Using a CV boot replacement kit from FCP euro, I put everything back together, and used the CV boot grease that came with the kit.

The axle shaft felt like it went back into place in the transmission housing. At least, I could not pull it out without using a huge flathead screwdriver, like I did, when I removed the shaft. I tightened again the bolts on the control arm and caliper. The car really needs a new bushing on the control arm! The axle nut has not loosened.

I looked at the front tires for wear and discovered the front drivers side tire was beginning to degrade. I put on a better tire. The drivers side rear tire did not look too good either but not as bad as the front, so I put on a better tire there as well. Both had cracks along the sidewall rim area and in between the treads. Not good in my estimation. The tires on the passenger side do not display any hairline cracks. I will post some pics.

So, with better tires on the drivers side, the humming noise has all but disappeared. I still notice a new vibration coming from the middle front of the car. But, that could be, I suspect, from the control arm that needs a new bushing. I could be wrong, though. I did not notice that vibration before the axle removal and CV boot repair. There was no clicking noise from the CV boot area on the passenger side, but since I had noticed a month or two ago that the boot was torn, I figured I would tackle the repair once it got warm (it did get up to 55-60 degrees earlier in the week, but now there are snow flakes in the air!!).

What I need to do now is put the newer tires on the same axle, probably the front since they have slightly more tread.

Appreciate any thoughts on what the vibration might be from :!:

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Re: Noticeable humming with CV boot replacement

Post by misha » Sat May 09, 2020 3:02 pm

Yes....tyres can make noise...especially if it's damaged like you described.

I would suggest to buy good tyres....but you are probably aware of that.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

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Re: Noticeable humming with CV boot replacement

Post by 5rivers » Sat May 09, 2020 3:33 pm

Torn boot:
IMG_20200504_115939.jpg
Cleaned up:
IMG_20200504_164034.jpg
New CV boot installed/clamped on:
IMG_20200504_194547.jpg

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Re: Noticeable humming with CV boot replacement

Post by 5rivers » Sat May 09, 2020 3:44 pm

Cooper tires.
Tire tearing:
IMG_20200509_170701.jpg
Hairline cracks on sidewall:
IMG_20200509_170716.jpg

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Re: Noticeable humming with CV boot replacement

Post by misha » Sat May 09, 2020 3:47 pm

You didn't needed to remove the whole axle....you could just remove the cv joint.
Just undo the axle nut and ball joint,pull it down to free the strut assembly,move the strut aside and pull out the cv joint.
Just need to spread the circlip on cv joint and tap the cv joint out.Sometimes it just slide down from the shaft after you spread wide the circlip.
15min job.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

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