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  1. #1
    Established Member Two Rings
    Join Date
    Jun 04 2012
    AZ Member #
    Greenville NC

    AC not working after Timing Chain rebuild

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    After I pulled the engine and transmission to replace and update the timing components, and basically rebuild the whole engine, my AC hasnít worked since. Refrigerant and all fluids are correct, but it still doesnít blow cold air.

    Anyone else run into this problem? Advice? Thanks for your feedback!

    - - - Updated - - -

    Forgot this: car is a 2004 S4, 6MT

  2. #2
    Veteran Member Four Rings Audibot's Avatar
    Join Date
    May 20 2010
    AZ Member #

    Did you reconnect the condenser refrigerant pressure switch? It may have gone bad regardless. Or if you had removed the fans, one may not be working.
    2016 A6 TDI Prestige - S-Line, Black Optics, Driver Assistance, HUD, LED Headlights, Cold Weather, Warm Weather
    2003 allroad 6MT - STUKLR Stage 1, Hotchkis sway bars, RS4 engine mounts, Apikol rear diff mounts

  3. #3
    Established Member Two Rings
    Join Date
    Jan 17 2018
    AZ Member #
    My Garage
    2016 Triumph Thruxton
    San Tan Valley, AZ

    is the ECON light on? if it is can you turn it off? if you cant turn it off check the fuse for it.
    2005 Audi B6 S4 - Brilliant Red with Black Recaros and 6MT.

    RS4 Guides, chains, tensioners, JHM Cam Adjusters, JHM intake spacers, JHM 6 rib lightweight pulley kit, SPEC single mass flywheel, new stock clutch, new clutch slave cylinder, JHM 255 LPH fuel pump, etc......

  4. #4
    Established Member Two Rings Mike50design's Avatar
    Join Date
    Feb 17 2017
    AZ Member #

    Did you replace the drier while you were at it?
    2007 Audi S4 (DTM)

  5. #5
    Veteran Member Three Rings a4lownslow's Avatar
    Join Date
    Feb 12 2014
    AZ Member #
    My Garage
    2007 Audi A4 2.0T
    Hudson WI

    Check HVAC module using vagcom for fault codes. Then go to your measuring values and check shutoff criteria for the compressor. From there you should hook up a manifold gauge and check high and low pressure.

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