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Thread: How To: CDV Delete / Install Stainless Clutch Line (07-09 5MT)

  1. #1
    Join Date
    Nov 2010

    How To: CDV Delete / Install Stainless Clutch Line (07-09 5MT)

    The SX4 has a damper or clutch delay valve (CDV) which is meant to slow down the clutch engagement to prevent drivetrain shock if the clutch were to be quickly engaged at higher rpms. It is common across other platforms to delete the CDV to improve the clutch responsiveness. The CDV can be bypassed without replacing the complete line as automat has pointed out in an old thread. The first step is to disconnect the retaining clip on the bleeder valve located on top of the transmission below the air intake and upper radiator hose. A second retaining clip on the CDV can be pulled out to allow the CDV to be removed. The factory clutch line can then be connected to the bleeder valve. At this point, the clutch would be bled using an 11mm wrench on the bleeder plug with a vinyl tub over the plug into a container to catch the fluid. Follow the clutch bleeding process as outlined in the RW420 manual on page 5C-4 to remove all air from the line.

    Aftermarket parts for the SX4 are limited but the stainless steel clutch lines from Audi/VW models in the table below will fit the 5 speed manual transmission of the 07-09 North American SX4 variants.
    Make Model Year Engine
    Audi TTS MK2 (2009-2015) 2.0T FSI
    Audi TTRS MK2 (2012-2013) 2.5T
    Audi TT MK1 (00-2007) 1.8T 180hp
    Audi TT MK1 (00-2007) 1.8T 225hp
    Audi TT MK1 (00-2007) VR6 3.2L
    Audi TT MK2 (2008-2015) 2.0 TSI
    Audi TT MK2 (2008-2015) 2.0T FSI
    Audi TT MK2 (2008-2015) 3.2L VR6
    Audi A3 8P (05-2013) 2.0 TSI (FWD)
    Audi A3 8P (05-2013) 2.0T FSI
    Audi A3 8P (05-2013) 3.2L V6
    Audi A3 8P (05-2013) TDI
    Audi A3 8V (2014+) 1.8 TSI
    Audi A3 8V (2014+) 2.0 TSI (FWD)
    Volkswagen Passat B6 (06-2011) 2.0T FSI
    Volkswagen Jetta MK4 (99-2005) 1.8T
    Volkswagen Jetta MK4 (99-2005) VR6 24V (02-05)
    Volkswagen Jetta MK5 (05.5-2010) 2.0 TSI
    Volkswagen Jetta MK5 (05.5-2010) 2.0T FSI
    Volkswagen Jetta MK6 Sedan (2011-2014) 2.0T Gen3 GLI (2013.5-2014)
    Volkswagen Jetta MK6 Sedan (2011-2014) 2.0T GLI (2012-2013)
    Volkswagen Jetta MK6 Sedan (2011-2014) TDI
    Volkswagen Jetta MK6 Sedan Facelift (2015+) 2.0T Gen3 GLI
    Volkswagen Jetta MK6 Sedan Facelift (2015+) TDI
    Volkswagen Golf/GTI/Rabbit MK4 (99-2005) 1.8T
    Volkswagen Golf/GTI/Rabbit MK4 (99-2005) VR6 24V (02-05)
    Volkswagen Golf/GTI/Rabbit MK5 (06-2009) 2.0 TSI
    Volkswagen Golf/GTI/Rabbit MK5 (06-2009) 2.0T FSI
    Volkswagen Golf/GTI/Rabbit MK6 (10-2014) 2.0T
    Volkswagen Golf/GTI/Rabbit MK7 (2015+) 2.0T
    Volkswagen Eos ALL 2.0 TSI
    Volkswagen Eos ALL 2.0T FSI
    Volkswagen CC (2009-2017) 2.0 TSI
    Volkswagen Beetle Beetle (2012+) 2.0 TSI
    Volkswagen Beetle New Beetle (98-2011) 1.8T
    Volkswagen .:R Models MK4 R32 (2004) VR6 3.2L
    Volkswagen .:R Models MK6 R (2012-2013) 2.0T FSI
    Volkswagen .:R Models MK7 R (2015+) 2.0T

    I picked up a Stainless Steel Clutch Line from USP Motorsports. The line is of good quality and coated so the stainless line won't wear through other parts if it rubs. Below are pics of the new line vs the factory line.

    If you opt to replace the entire line, you will end up puling the retaining clips from the bleeder valve and clutch master cylinder and inserting the new line in place of the old one. Careful not to get fluid on your paint. Replace the retaining clips and bleed the clutch and enjoy the new line.

    Here is the new line going into the bleeder valve.

    Below is the new line going into the clutch master cylinder

    Here is a comparison of the new line vs the stock connectors. There are 2 seals on the new line vs only 1 on the stock line.

  2. #2
    Join Date
    May 2012
    Saskatchasnatch, Canada
    I thought about doing this a while ago but never got around to it. What's the driving like after the removal?
    '09 JX, Apollo filter w/factory air intake, under drive pulley, reflash, 18's

  3. #3
    Join Date
    Nov 2010
    I am still in process of breaking in the engine and clutch. My initial impression is it feels like there is better control of the clutch engagement. The CDV seemed to slip the clutch slightly before engagement. With the removal of the CDV and new clutch line it now engages immediately.

  4. #4
    Do you know if this can be done to the 6spd models? And is it seriously as simple as removing the cdv and plugging the stock line back into the slave?

  5. #5
    Join Date
    Nov 2010
    I'm not familiar with the 6 speed so someone else will need to confirm the CDV connection and connectors for an aftermarket clutch line.

    It is as simple as removing the CDV on the 5 speed 07-09 models but you will need to bleed the clutch as well.

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