2001 S80. Knocking noise when going over bumps
 

Hi

I've got a knocking noise that seems to come from somewhere under the car on the passenger side when I go over bumps or take turns fast. It sounds like metal to metal, but I have no idea what it can be. Is there anyone who has got any ideas what it can be?

Probably your rear subframe bushings. Do you also notice it while coming in and out of a driveway or parking spot? It's common on that year. Give me a bit to dig up the part numbers, but repair consisted of putting the car on ramps (or jackstands) and removing the rear subframe bolts while supporting the subframe with a jack. Then you just lower the subframe about 1"-1.5" and place some large o-rings in the bushings. Install new subframe bolts and torque to 90ft/lbs.

Here are the part numbers:
O-ring 8638585
Screw 981062

You will need two o-rings and two bolts.

I think it was around $26 for everything and installation took about 25 minutes.

Here is a copy of the TSB from Vadis.

http://www.ohmfab.com/files/Volvo_S8..._Noise_TSB.pdf

Thanks for the help! :) I'll see if I'll try to mend it myself, or just go and bother the dealership about it.

I had the same noise and it turned out being just the fuel filter line bangin up against the bottom of the car. Right under the paassenger side seat. I just took and spare rubber hose and wedged it up in there and its gone...

I should add that you can feel the clunk in the floor when the subframe shifts, and it will also happen at slow speeds like coming in and out of the driveway.

For what it's worth, I had a similar knocking noise that was significantly pronounced at lower speeds and while driving over uneven pavement. My mechanic found the front passenger strut mount loose and the strut leaking. I had him replace both struts and mounts and the noise has gone away. I also sensed a slight laterally instability at freeway speeds that may have been due to the loose strut mount. This went away after the repair.
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Honda Canada Inc. History

I have a 2002 S-80 non-turbo with approximately 130k miles.. I replaced pretty much all the front end parts around 100k in an effort to chase down clunks. I have done the control arms twice- first set was aftermarket from FCP and the bushing wore out in 10k miles, so I sent them back and got a set of Volvo OEM control arms. They are much better. I have had to replace one of the sway bar links. I replaced the Struts, Strut bearings (2x- first were crappy and bound and popped when you turned). Strut bushings 2x - again- aftermarket only lasted a few miles. I used Volvo OEM on the second set- no issues yet. I have replaced the right lower engine mount- mine was metal on metal. Replaced the upper torque mount. In related matters, both drive shafts have been replaced, as well as both front wheel bearings. New brake rotors and pads (high quality ceramic). While these did effect repairs that were needed and eliminated a lot of the rattles, pops and groans, I still have some left to eliminate, and these new ones are pretty bad- very loud.

I purchased the IPD kit with the subframe bushing inserts, as well as the plastic washers that go between the metal parts. I also got the Volvo OEM orings that go between the rear subframe busing and the frame. Today I install all of the above to hopefully eliminate the worst kind of popping, and honestly, I hear no difference. Still popping.

About all that is left to do is the lower engine torque mount and the transmission to subframe mounts. Other than that, I suspect I wold have to go back to some of the things already replaced. Talk about frustrating!