27W-6-808-12 Type R / Type S BPV

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These instructions were written with a 2018 Honda Civic Type R. FL5 and DE5 install process similar. Install in FL5/DE5 is much easier due to the extra space between the engine and the radiator

You will proceed to remove the OEM Bypass Valve from the vehicle in the coming steps

Use needle nose pliers to loosen both OEM spring clamps and slide them up the hoses

Pull the Boost Feed and EVAP Dump hoses off the EVAP solenoid

Using the 5.5mm socket and ratchet, loosen the two OEM clamps securing the intake tube

Remove the valve cover breather pipe from the intake tube

This breather pipe is secured with a permanent OEM clamp. This clamp cannot be removed easily so the pipe will need to be pulled free without removing the clamp. This can be difficult the first time. This permanent clamp will be replaced with the provided regular hose clamp during re-installation

Remove the OEM intake tube from the vehicle

Remove (2) 10mm bolts securing the hard coolant line to the inlet pipe and move out of the way

If you are working on a FL5 or DE5 this coolant line will not be present

Remove (2) 10mm bolts securing lower hard water pipe

Use a 10mm socket and ratchet to remove the bolt shown

There are 2 bolts holding this bracket. The lower one is well hidden (yellow arrow)

Use a ¼ inch ratchet, 10mm deep socket, and 3 inch extension, remove the 10mm bolt shown

Remove the lower 10mm bolt as shown

Unplug the wastegate actuator by pressing the tab shown, and pulling the plug downward

Unclip the vacuum hose from the clips on the vacuum line retainer bracket

Using needle nose pliers, undo the clamp as shown and free the rubber hose from the hardline

Follow the line down and find the lower clamp holding the hose onto the BPV

Undo the lower clamp and free the rubber hose from the BPV

Remove the rubber hose from the car and set aside

Turbo inlet pipe assembly is shown off the car here because the bolts are hard to see installed on vehicle

The (2) 12mm bolts are shown off the car to better demonstrate their location

Remove the Inlet Pipe by removing the (2) 12mm bolts shown above, a deep 12mm socket and ~3" extension work best here. These bolts will be reused

For FK8 application, skip to step 12

Use a 10mm wrench to remove the three bolts securing the OE BPV to the turbocharger

We have found that a short ratcheting wrench works best here

Note the orientation of the BPV nipple. The 27WON BPV will need the nipple facing the same way once installed

Remove the OE BPV from the engine bay. This is done by lowering the BPV under the hard coolant line and AC line

This is done by lowering the BPV under the hard coolant line and AC line, then pulling it up along the radiator in the path shown

FK8 application only. Skip to Step 14 for FL5/DE5

Loosen the wire loom by pulling up on loom to unclip it from it's location

Unplug connector from wastegate solenoid. Then move entire line towards passenger fender area of the vehicle

Remove clamp from vacuum line by pinching then sliding down then remove vacuum hose from metal line

Use a 10mm socket and ratchet to remove the two(2) bolts circled in blue

Slide vacuum line assembly down under the coolant hose and place out of the way as shown

FK8 application only

Note the orientation of the BPV nipple. The 27WON BPV will need the nipple facing the same way once installed

Use a 10mm wrench to remove the three bolts securing the OE BPV to the turbocharger

We have found that a short ratcheting wrench works best for the top two bolts, while a 10mm socket and 3 inch extension works best for the bottom bolt (as shown)

Remove the OE BPV from the engine bay. This is done by pulling the valve slightly out and then out through the top towards the turbocharger

Nipple

Knurled ring

Bottom-side

O-rings & Mounting Hardware

If you've disassembled the valve for any reason then make sure the knurled ring is very tight

Apply a small amount of supplied lubricant or engine oil to both O-rings prior to installation

Insert large O-ring into groove on bottom-side and press down firmly to secure

Insert small O-ring into groove on bottom-side and press down firmly to secure

Skip to Step 17 for FK8 application

Note the location of the openings on the turbocharger flange. These must align with the 27WON BPV during installation. The 27WON BPV will go into the engine bay the same route that the OE BPV came out. Place BPV into position

You may need to rotate the coolant line spring clamp circled in purple to provide more clearance

Guide the first fastener through the BPV mounting hole and thread onto turbocharger as shown. Leave finger tight

Thread second fastener until finger tight

The last mounting hole is underneath and not visible. Using your fingers, hand thread remaining fastener into the turbocharger. Leave finger tight

Use a ratcheting wrench to tighten all three mounting bolts to snug (7-9 ft-lbs)

Skip to next step for FL5/DE5 application

Note the location of the openings on the turbocharger flange. These must align with the 27WON BPV during installation. The 27WON BPV will go into the engine bay the same route that the OE BPV came out

Pinch clamp on coolant line with a set of pliers then slide towards middle of hose. You will not be removing the hose itself

For access to get BPV in place if your turbo has a stud here then remove top right stud on turbocharger flange by unscrewing it using your hand. Most turbos will not have studs here

Guide the first fastener through the BPV mounting hole and thread onto turbocharger as shown. Leave finger tight

Thread second fastener until finger tight

The last mounting hole is underneath and not visible. Using your fingers, hand thread remaining fastener into the turbocharger. Use a ratcheting wrench to tighten all three mounting bolts to snug (7-9 ft-lbs)

Reinstall coolant clamp in the original location on hose. Reinstall turbocharger stud if removed earlier

Confirm BPV fitting is pointed in approximately the direction as shown. It should come correctly oriented. If you can't get vacuum line on the BPV then you can adjust the nipple position as per below

To adjust nipple position loosen the knurled ring 1-2 turns

Once loose, rotate the top portion "W" until proper alignment is achieved. Hold top "W" portion in place while rotating knurled ring in opposite direction to tighten

This needs to be tight so it does not vibrate loose!

Skip to Step 21 for FL5/DE5 fitment

Slide vacuum line assembly back towards motor then under the coolant hose and as shown

Use a 10mm socket and ratchet secure the (2) bolts shown

Reattach vacuum line to metal tube. Slide clamp up (not pictured) and secure at top

Move wiring that you placed out of the way earlier back into place, then plug connector to solenoid

Secure wire loom by pushing down on loom to clip it to it's location

Re-attach vacuum line onto your new 27WON BPV

Using a set of pliers, slide down spring clamp to secure line to BPV

Route vacuum line up and over the coolant line

To demonstrate the location of the mounting bolts, the turbo inlet pipe is shown off the car

Reinstall the two OE 12mm bolts with a 12mm socket and a 3" extension

Use torque wrench, 3" extension and 12mm socket to secure TIP to turbo at 18 ft-lbs

Re-insert the previously removed vacuum line into the clips on the TIP wire loom

Install the upper portion of the vacuum line over the hardline as shown

Using a set of pliers, slide up spring clamp to secure the line as shown

FL5/DE5 Only. For FK8 fitment skip to next step

Re-attach vacuum line onto your new 27WON BPV

Using a set of pliers, slide down spring clamp to secure line to BPV

Reinstall the (2) OE 10mm bolts to mount the top hard line to the intake pipe

If you are working on a FL5 or DE5 this coolant line will not be present

Reinstall the (2) OE 10mm bolts to mount the bottom hard line to the intake pipe

Reinstall the OE 10mm bolt to mount the turbo inlet pipe as shown

Torque all 10mm bolts to 10-12 ft-lbs

There are 2 bolts holding this bracket. The lower one is well hidden (yellow arrow)

Using the OE 10mm bolt reinstall the upper part of the wire loom as shown

Using the OE 10mm bolt reinstall the lower part of the wire loom as shown

Plug in the pigtail of electronic wastegate

Reinstall the intake tube as shown and secure the clamps with a 5.5mm socket

Secure the hard pipe with the provided 11-20mm hose clamp as shown

OE Clamp is shown and cannot be reused

Use needle nose pliers to clamp the OEM spring clamps for the EVAP silicon Boost feed and EVAP dump hoses

The 27WON BPV is designed to provide OE like boost control and trouble free operation. Periodic service is necessary. If the valve is not serviced it may cease to perform correctly. This could shorten the life of your turbocharger. See instructions at the end of this guide for BPV service

BPV service should happen around every third oil change (12,000-15,000 miles). Spare lubrication is included for this

This chart shows good BPV operation for both the OE BPV and the 27WON BPV. Your boost control should look something like this

Notice there is not a spike in boost pressure as the turbocharger spools up

Notice there is not a spike in pressure when letting off throttle

Notice the time to go from purple arrow to green arrow. This is time to vent TC pressure. You see 27WON and OE are very similar

Improper BPV operation can trigger CEL

P2261: Turbocharger BPV Issue. This may trigger for reasons not related to BPV. Check boost control using the example on the previous step to make sure your BPV is working properly. OE BPV can throw this code when the rubber seal tears

A properly functioning BPV will make some noises when it vents. With an OE intake you might not hear these. With an open filter intake you'll hear all the noises. A "Psssst" or "whooshing" sound is normal

If your turbocharger is not able to vent quick enough (for various reasons) it can make an audible noise. This 'flutter' or 'choo choo' sound is from compressor surge. This can reduce the life of the turbocharger. If you hear this noise, check out your entire boost control system including BPV

Watch this video https://www.youtube.com/watch?v=2QaajARc... at around 15-17s there is an example of compressor surge from the throttle plate closing

This completes the installation of your 27WON BPV

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Continue to the next steps for cleaning and lubrication of BPV

The 27WON BPV will require maintenance every three oil changes or so depending your driving conditions

If you are constantly driving in dusty environments we recommending bumping your maintenance up to two oil changes or so

To perform maintenance properly, you will need the following items

27WON BPV removed from your vehicle

Clean paper towels / shop towels

Provided vial of high temp grease

A couple of Q-tips, or another instrument for applying the grease

Twist the knurled ring on the BPV counter clockwise to loosen the BPV cap as shown

Remove the cap and set it to the side

Flip the BPV over and press on the center of the internal piston as shown

It is important to press as close to the center as possible. If the piston is pressed off to one side it can become crooked and stuck inside of the BPV

With the BPV fully disassembled, wipe all of the parts clean with shop towels

You can use a cleaning solution here if your BPV is especially dirty, just make sure any solution is fully wiped out before you apply grease to the internal components

With the components all clean, generously apply the provided grease as shown:

Inside of BPV body

BPV upper o-ring

BPV piston

Properly lubed components should appear as shown

Insert the piston back into the BPV body in the orientation shown

Just as when it came out, the piston will need to pressed in as even as possible

Place the BPV cap back onto the body as shown

Ensure the BPV spring sits inside of the piston indent circled in green

Hand tighten the knurled ring onto the BPV body as shown

Ring must be fully tight or engine vibration can work it loose

Use your finger to push the piston from the bottom a few times. The piston should return smoothly to the closed position

Reinstall your 27WON BPV!