A DIY on CBV Install on AWD P80 Volvos.
MVS Forum member lexluther describes in descriptive language how he swapped the Compressor Bypass Valve in his V70XC 2000. If you know how to do this more easily on the AWD P80 Volvos, please add to the forum thread:
Yes this first rate individual designed the CBV bottom bolt to be virtually un-accessible due to the cooling pipe running off the back of the engine. He could have allowed at least 3mm more clearance on the pipe to make it easy as I see the pipe has plenty of clearance in the surrounding area for at least 1 addition inch of clearance in there.
Also to note the Forge valve has allen bolts rather than hex head that are longer then what is removed on the stock CBV making installation and down right heart to heart one on one with God praying for an end to the nightmare.
1.5hr later on just installing that bottom bolt with zero room or tolerance it was only after removing the heater hose that cross the trans and goes into the cylinder head which also requires the bracket that hold the vacuum lines for the TCV be removed that I could use an allen key for the Forge bolts. The sharp edges of the trans wiring hardness and other edge makes for a scene from the Van Damme movie Blood sport when he is punches a bowl of glass with his hands for training. You come out of the experience with raw and cut up hands and feeling like you narrowly escaped death. I have rebuild numerous cars from bare chassis on up in the last 17yrs and I have 3 tool boxes full of snap-on tools pro set-up so I am no spring chicken and nothing prepares you for this. No allen socket will fit due to the pipe clearance and a ball end allen key barely fits off angle that you must turn 1/8th at a time until it threads enough past the pipe where you can better turn it.There must be a special tool from Volvo that is bent in such a manner to remove that bottom screw on the stock set-up. With that I should have re-used the original bolts versus what came with the Forge valve and the installation would have been slightly easier. Understand that the IPD instructions are not much of a help neither was any google search even though I followed IPD instructions during the CBV replacement as Forge come with no instructions and just in bubble wrapped. Ahh to recap and as luck would have it the stock bottom bolt was one of those that are tight and doesn’t spin then comes very loose then tightens up again. It just teases you with false hope and crushes your spirit. The uppers were very easy to remove and spun easily again lady luck strikes…
………Understand that the IPD instructions are not much of a help neither was any google search even though I followed IPD instructions during the CBV replacement as Forge come with no instructions and just in bubble wrapped. Ahh to recap and as luck would have it the stock bottom bolt was one of those that are tight and doesn’t spin then comes very loose then tightens up again. It just teases you with false hope and crushes your spirit. The uppers were very easy to remove and spun easily again lady luck strikes…
My heart goes out to you guys that are working on cars with more use and/or in area’s were the cars are exposed to the elements as this job can be worst for you with rust and wear taken in consideration.
I can only serve to inspire you that eventually it can be done with perseverance and patience and offer this advice.
CBV install on a Volvo XC70Last Updated on August 6, 2024
