An excellent write-up for replacing rear shocks on 1993-2000 Volvo 850/V70/S70/C70.
This happens to be for 1998 Volvo V70 Rear Shock Absorber + Mount.
1. The trickiest part of this job is in the bolt holding the Shock Mount. These bolts were rusted through and I broke one of them (it took 3 hours to get the stud out!). Learned my lesson, and the rest is easy.
The Nut is welded to the chassis.
– Once the car is safely on jack stand. From underneath apply some grease on the Bolt part below the nut. This way when the bolt is removed, the grease is sucked into the nut.
– Spray the top of these bolts with WD-40 or PB Blaster. Let it sit for 30 minutes.
Go and do something else in the mean time.
Then loosen these bolts about 2 full turns. Once you feel the resistance, this is when the rust is drawn into the nut. Stop here. Again, Spray WD-40 or PB Blaster generously around the bolt so it flows downward into the nut. Let it sit for one hour.
– When removing the bolt, back it out 2 turns, tighten it 1 turn. Repeat the process to get the bolt out slowly. Back and forth and back and forth to work the rust out. If you feel too much resistance, stop, apply WD-40 or PB Blaster and wait. This is similar to tapping a new thread (same idea).
2. The shock mount bolt is M8 x 1.25 x 30. Get a four (4) bolts at hardware store (or Volvo dealer) beforehand. Get four (4) M8 nuts in case the factory nut is stripped.
3. I use Bilstein TC Shock Absorber ($58/each) and Volvo Shock Mount (Corteco, $24/each). Got all my parts at http://www.rmeuropean.com. FYI, Bilstein Struts/Shocks are L.T. warranteed.
Very happy with the ride (I also have Bilstein TC as the Front Struts).
4. Torque values:
– Shock Absorber Top Nut: 40 Nm
– Shock Mount Bolt: 25 Nm
– Shock Absorber Bottom Nut: 80 Nm
5. You need an offset wrench (17-mm) for the Shock Absorber Nut. Sears carries this offset wrench! Another choice is Air Tool but be careful not to apply too much force, the shaft can spin and damage the absorber seal.
1. Car in Park, Apply Hand Brake. Chock Front wheels!
2. Jack the Rear and place Jackstand under the subframe (where the delta control arms is attached to). Yes Jackstand under the subframe, and not under the control arms.
3. Open the trunk, remove flooring material. The Cover is held by four (4) 10-mm bolts, 2 on each side. Once this is removed the Shock Mount is in plain sight: