COBB Tuning XLE BPV Install Instructions
Subaru - 712660
Mitsubishi - 752660
Mazda - 771660
Subaru - 724660
Nissan GT-R - 7C1660
Congratulations on your purchase of the COBB Tuning XLE Bypass Valve Kit. The following instructions will assist you through your installation process. Please read them first BEFORE beginning the install and familiarize yourself with the steps and tools needed. If you feel that you cannot properly perform this installation, we HIGHLY recommend you take the vehicle to a qualified and experienced automotive technician.
EVO X WRX/STi Mazdaspeed3/6
R35 Nissan GT-R
2. Using a pair of pliers, remove the return line from the bypass valve. Each application is a bit different.
3. Remove the vacuum line from the factory bypass valve. Each application is a bit different.
4. Using a 10mm or 12mm socket with ratchet or 10mm or 12mm open end wrench (depending on application), remove the 2 bolts that hold the bypass valve in place.
TIP: Make sure to keep an eye on the factory gasket behind the BPV. They can fall when you remove the valve and end up in difficult to reach locations!
5. Remove the bypass valve.
In order to adjust the spring tension on the COBB BPV, adjust the set screw in the top of the BPV body.
It is recommended that every time you change your oil you inspect your COBB Tuning Bypass Valve to make sure the piston is still moving freely. You can do so by unbolting the BPV from the vehicle mounting flange and pushing on the piston. If you can feel some resistance, it is advised to remove the piston from the body and clean and re-grease the piston, we recommend ARP Ultra-Torque Fastener Assembly Lubricant, P/N 100-9911 or Super-Lube Silicone Grease with PTFE, but any moly-based grease will work fine.
Disassemble the COBB Tuning Bypass Valve
In order to remove the piston, unbolt the base flange from the body using a 3mm allen key. Depending on the BPV model you have, this may be 5-7 socket head cap screws. When removing the piston, be careful to not cut the o-ring. If your o-ring is damaged, you can contact COBB Tuning for a replacement.