Estimated Installation Time: 2.0 Hour
Noise Pipe Bypass Air Duct Kit – ES 250690 and ES6065
(Kit includes bypass duct and cowl plate)
10 mm socket
13 mm socket
T-20 and T 27 Torx Wiper arm puller Flashlight/worklight
This tutorial demonstrates how to remove the noise pipe from your Golf V 2.0T.
The noise pipe is installed at the factory and has one purpose: to blow air intake noise to the cabin to improve driver feedback. If you’re a motorist who prefers peace and quiet and want to remove the noise pipe altogether, this project is for you!
We will remove the noise pipe and install a new air duct between the intercooler outlet and throttle body. The replacement air duct in the kit eliminates the air outlet for the noise pipe and sends all boost to the throttle inlet, where it belongs.
• Remove the old noise pipe (silhouetted in image below).
• Install a revised air duct between the intercooler outlet and throttle body.
• Install a blocking plate in the cowl area water tray to keep vermin from making nests (and chowing down on your wiring harness!).
Let’s make room to work. Remove the engine cover/air filter housing.
- Unplug the MAF harness connector.
- Disconnect the air inlet duct from the engine cover.
- Release the metal clips at the air hose that connects the MAF outlet to the turbo.
The engine cover/air filter housing is held
in place by four rubber grommets that snap over pegs on the engine (arrow). With the ducts disconnected and the MAF unplugged, lift up on the housing at each corner to pop the cover from the grommets. (User alert: some muscle may be needed, especially if grommet rubber is dry. )
Caution: Cover the turbo inlet to keep foreign objects from falling in! It’s a turbo, not a weed eater.
Locate the noise pipe (highlighted). It runs between the air intake duct and cowl area.
We will remove and discard this pipe.
Remove the noise pipe fasteners: bolt and screw. Pry up on the hose retainer clips (arrows) located at opposite ends of the sound tube. (These release like radiator hose clips.)
Remove the noise pipe and lay it aside.
Next, we need to replace the original air duct between the intercooler outlet and throttle body. The original duct has an extra outlet for the noise pipe (arrow). We will replace it with a new duct that has no noise pipe outlet.
Note: Unlike some mods that simply block the sound tube outlet, our new duct will have no plugs to blow out against your closed hood!
For reference: The duct is located on the front of the engine, just behind the electric cooling fans.
Special Note: You may notice that the cooling fans are missing from several shots. We experimented and removed the cooling fan assembly after we had already removed the old duct from the front of the motor; just to see if there was any advantage.
The Good: Removing the fans made some much-appreciated elbow room: it was easier to install the new duct and to take photos.
The Bad: With the fans removed, you’ll want to take an extra step and protect the backside of the radiator with a cardboard shield so you don’t ding any of the ns and tubes with a slip of the wrench.
The Ugly: Sliding the fans back in place with the new duct installed is possible, but just barely. It was a shoehorn t. Bottom line: you may want to work around the fans, even though there is less room.
Remove the air duct retaining nut (right arrow) with a 10 mm socket.
Loosen the clamp at the rubber hose connecting the air duct to the base of the throttle body (left arrow).
Take your pick: either unplug the pressure sensor located in the air duct, or remove it (two screws). It has to be transferred to the new pipe anyway, and if the electrical connector is hard to disconnect, it may be easier to unscrew and remove the sensor, and let it hang for now.
Raise the car and drop the plastic lower engine cover. Many, many screws. Grab your electric screwdriver or power nut driver for this, or bring your lunch.
With the car still raised, disconnect the intercooler hose from the bottom of the duct (right arrow).
Remove the lower attachment bolt T27 Torx, left arrow).
Slide the old duct out; slide the new one in place. If you removed the pressure sensor earlier, install it in the new duct. Don’t forget to plug it in!
- Slide new the duct into the rubber hose at the throttle body (left arrow). Reinstall the clamp.
- Pop the upper grommet over the stud (right arrow). Reinstall the retaining nut.
- Replace the lower attachment bolt (left arrow).
- Reattach the lower intercooler hose (right arrow).
- Reinstall the lower engine cover removed in Step 7.
Install the Block-O Plate
Now we need to remove the rest of the noise pipe from the water tray and block o the hole it leaves.
Remove the weatherstrip that retains the front edge of the plastic water tray cover. Just pull back on one end and peel it off.
We choose to remove the plastic cowl (water tray)cover rather than simply pry up on its front edge (a shortcut that commonly results in a cracked water tray cover).
Remove the wiper arms. Pop the plastic buttons and unscrew the wiper arm retaining nuts (inset photo). Then pull the arms using a suitable puller.
Lift on one side of the water tray plastic cover until it starts to pop out of the attachment groove located at the base of the windshield. Work your way carefully across the windshield until the tray is free. Remove it and lay it aside.
The plastic is thin and may be brittle, so work carefully. (We snapped a shot of a cracked tray to show what happens when muscle and enthusiasm get out of hand.)
Unbolt the metal support crossmember and lift it away. We removed the water tray wiring harness from the clips in the crossmember and pulled the crossmember all the way out to make room for photos. You may be able to simply lift the metal crossmember far enough to make working room.
- Remove the top locking clip that retains the sound tube and wiring harnesses (arrow).
- Remove the sound tube from the water tray. (Already removed here. See image Step 11 to see tube installed.)
- Wiggle the lower plastic retainer around the wire harnesses and remove it from the water tray.
- Insert the new blockoffplate as shown to close o the hole where the noise pipe used to be.
- Route the wire harnesses through the opening on the left.
- Slide the new retaining clip down over the wire harnesses until it snaps in place.
Retrace your steps.
Reinstall the crossmember. Make sure the water tray wiring is secured in the harness clips.
Snap the plastic water tray back in place in the windshield groove. (Clean away all dirt from the groove first.)
Reinstall the windshield wiper arms.
Replace the water tray weatherstrip removed in Step 12.
Replace the engine cover/air filter housing.
This completes the installation of the noise pipe bypass kit.