Installing a blow off valve on an S60R
Special thanks to: Cotton

Tools Needed:
Sockets Hack Saw
Screwdriver
Razor


Parts Needed
Blow Off Valve (HKS SSQV, Tial etc.....)

Blow off Valve Flange (Aluminum or Steel, can be found on ebay)

Aluminum or Steel Pipe depending on what flange you buy (about 6"- 8" long and an Outside Diameter of 2.33")

1 foot of standard vacuum hose

Vacuum line Y-tube (only if you plan on running CBV & Blow off Valve together)

2, 2 1/2" T Clamps (can be found at Hydraulic supply store)

Heat shrink tubing (optional)


Before you do anything to the car you are going to need to get a 2.33" outside diameter pipe.  http://www.onlinemetals.com/ is where I purchesed mine and had it turned down by a machine shop for an exact fit.  You will also need to drill a hole the size of the inside diameter of your flange in your pipe where the flange is going to be welded.
Will look like this when finished.

BOV Flange/Weld

With the flange welded on your pipe install your Blow off Valve on the flange.  Keep in mind if you are installing your Blow off Valve on the turbo piping right before the intake you are going to want the Blow off Valve to sit parallel with your pipe.  Remove the air duct Bolts (all 10mm as shown below)  Now gently pull the air duct towards the motor and out.


S60R Engine

Now that the air duct is out of the way there are three 10mm bolts holding the air filter box in place, remove them. Next loosen the air intake hose clamp located just above the air filter box, while you are there disconnect the air flow sensor located between the hose clamp you just loosened and the air filter box.(As shown below)
Pull the air filter box out of the air intake hose, as you lift the air Filter box there is a group of 3-4 hoses attached to the bottom of the box just unclip them and lift the air filter box out.

Engine cover

Now that you can get to the turbo piping this is where it gets tricky.  You need to make your first cut just below the intake manifold with your hacksaw, sawzall, or razor knife.  Whatever you can cut with in a tight space since there is not a lot of room to work!.

Once you have made the first cut you can loosen the hose clamp where the turbo piping connects to the inter-cooler and the hose clamp on the small hose in the middle of the pipe (as shown below) and the whole thing should lift right out.

S60R Turbo


Now that you have the turbo piping out you are going to cut 3-4 inches (depending on the size of your Blow off Valve Flange) off the end you just cut.  Make sure to take a file and remove any rough edges from the cuts you just made. Also take a clean rag and wipe out any plastic debris inside your piping before re-installing it.

Put the T-Clamps on the turbo piping (make sure you position the nuts on both clamps facing up, so you can get to them once you put the pipe back in the car)

Now insert one end of your pipe with the Blow off Valve welded on it into the pipe you just cut the 3-4 inches off of earlier.  Make sure the actual Blow off Valve hangs below the turbo piping. If you put it on top when you go to put the pipe in the car the Blow off Valve will hit the intake manifold, there is not enough room.  Tighten the T-clamp down to where the Blow off Valve assembly is tight but can still move a little.  Plug the other end of your Blow off Valve pipe into the turbo piping on the car, reconnect the other end to the inter-cooler and tighten the hose clamp. Before you forget, reconnect that small hose and hose clamp you took off earlier as shown below.

Volvo Blow off valve

Now that all the turbo piping is in the car with the Blow off valve in between you can move the Blow off Valve assembly to where you want it (make sure the back of your Blow off Valve isn't hitting the motor) and tighten your T-Clamps down nice and snug. Make sure everything is tight and grab the turbo piping and shake it a few times to ensure its tight and will not come apart under boost.

Valve installed


Now your Blow off Valve is installed but now you need to connect your vacuum line(s)  If you want to run your stock CBV and your newly installed Blow off Valve at the same time this is what you do!

Disconnect the CBV vacuum line from the intake manifold.  Next install a 2 inch piece of vacuum line with a Y tube

Vacuum Tee

And connect the CBV vacuum line and a Vacuum line from the HKS to the Y-tube
boost line

Finally connect the vacuum line to your Blow off Valve.  

If you just want to run your Blow off Valve only than you would just take a piece of vacuum line from the intake manifold straight to the blow off valve! Like this.

Manifold BOV S60R

Reinstall air filter box making sure to reconnect everything you disconnected earlier.  

Finally once everything is back together start the engine and check to make sure everything looks tight and you have no  leaks or problems.

Project S60
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