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Best Grease for Audi A4 B5 Air Mixer Flaps: Dry Teflon vs PTFE Silicone, Heat Resistance

Dather 16419 15
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
  • #1 16678875
    Dather
    Level 11  
    Hello.
    I am in the process of regenerating the air mixer in my audi A4 B5.
    After dismantling the ventilation tunnel, I "split" it in order to glue the flaps with new foam.
    In addition, I became interested in the work of the aforementioned flaps - they did not jam, but worked with low / medium resistance, and the original grease caught the impurities and has the consistency of modeling clay.
    I want the grease to stay in place after heating, because it will be near the heater.
    What grease should you use, what can you recommend? Use dry Teflon grease e.g. with K2? Or maybe PTFE silicone?
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  • Helpful post
    #2 16681394
    Olon
    Level 12  
    whats up
    For years, I have been using molybdenum disulphide grease, commonly known as "graphite", for this type of connection.
    At this temperature and with vibrations from driving, each lubricant gets a little less ... sticky. "Graphite" has the advantage that the agent reducing friction is not only grease but also MoS2, which can stick to these surfaces when fat has already failed. "Inventions" in aerosols are unfortunately - in most cases - in the short run or on an ad hoc basis.
    You give a little bit of MoS2 grease by spreading it over a "working" surface and that's enough. :-)
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  • #3 16681587
    goldwinger
    VIP Meritorious for electroda.pl
    White or yellow (white enough) lithium
    In no case anything with molybdenum disulphide
  • #4 16681599
    robokop
    VIP Meritorious for electroda.pl
    Olon wrote:
    For years, I have been using molybdenum disulphide grease, commonly known as "graphite", for this type of connection.
    . Certainly molybdenum disulphide grease is not called grafitowanym .
    Plastics are usually lubricated with anything - the best would be white with PTFE. It is still necessary to correct that the grease will settle dust, destroying the lubrication effect with time.
  • #5 16682752
    sk700
    Level 31  
    For this type of thing I use silicone used for machines from the food industry.
  • Helpful post
    #6 16683420
    tzok
    Moderator of Cars
    White with PTFE (Teflon) or so-called dry teflon grease (does not catch so much dirt), it should not "flow" from the heat.
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  • #7 16683919
    Dather
    Level 11  
    Gentlemen, thank you for your answers, I also thank the moderator for moving the topic to the appropriate department.
    I have a choice:
    White Lithium PTFE grease (Spray)
    - Dry PTFE grease (Spray)
    - PTFE silicone grease (Tube)

    Take something spray or silicone in a tube?
  • Helpful post
    #8 16684029
    tzok
    Moderator of Cars
    Typically for such elements is "Dry PTFE grease".
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  • #9 16684045
    Dather
    Level 11  
    Tzok, you and other users thank you very much for your help!
  • #10 19207299
    Rand92000
    Level 1  
    goldwinger wrote:
    White or yellow (white is enough) lithium
    Nothing with molybdenum disulfide in any case


    (Subject old, but requires correction.)
    What are you saying is the opposite - lithium reacts with plastics - DO NOT use lithium lubricants for plastics!
    And molybdenum disulfide is used in printer services (just for plastics)
    ... You cannot do modern towot, because it is litas (today) that is being added to it!
    There are various cheaper lubricants like silicone PTFE and oils.

    LIT + PLASTIC = DESTRUCTION of most plastics, or at least weakening of the structure
  • #11 19207352
    robokop
    VIP Meritorious for electroda.pl
    Rand92000 wrote:

    What are you saying is the opposite - lithium reacts with plastics - DO NOT use lithium lubricants for plastics!
    Look, the snowmen from the automotive industry do not even know it - and they load lithium lubricants wherever they fall into ball joints of steering systems and gearbox levers.
    Rand92000 wrote:
    Modern towot cannot be used either, because it is lit (today) that is added to it!

    Where did you get away from? Technically, practically every lubricant, even the one made of PTFE, is lithium soap - it is a thickener, with the addition of oils it creates the so-called lubricant matrix. Only then are various kinds of conditioners added, or friction reducing agents - PTFE or molybdenum disulfide. https://www.hydro.com.pl/materialy/_upload/Katalogi/Katalog_Chemia_przemyslowa_2017.pdf
  • #13 19207453
    robokop
    VIP Meritorious for electroda.pl
    tzok wrote:
    Molykote X5-6020 - Lithium grease
    Molykote EM-30L - synthetic grease

    Quote:
    Molykote(R) EM 50L
    Synthetic grease with increased adhesion (adherence to the lubricated surface) with excellent noise reduction ability, intended for the lubrication of plastic / plastic and plastic / metal and metal / metal applications. It is compatible with most plastics, elastomers and plastics (including polyacetals and polyamides). Effectively removes noise from plastic parts. DC EM50L is silicone free and is based on synthetic hydrocarbon and lithium soap (base oil - polyalphaolefine, thickener - lithium soap).
    Use - in applications such as electromechanical small motors and moving parts in printers, tape recorders and players, CD-ROM drive.
    Automotive industry; reduction of noise and vibration in plastic actuators (handle rails and switches, etc.), electrical appliances, precision appliances, audio equipment and other appliances that have plastic components. In addition, it is used as a throttle lubricant to reduce noise from moving parts. Other examples include moving parts for lights, roof drives, and window openers.
  • #14 19244241
    Dather
    Level 11  
    It's nice that the topic has been revived after so many years :-)
    I have a question about how to use polyurea grease for plastic-plastic joints.
    This type of grease is used by vehicle manufacturers to lubricate the ball mechanism in the gear shift levers.
  • #15 19244861
    robokop
    VIP Meritorious for electroda.pl
    Dather wrote:
    This type of grease is used by vehicle manufacturers to lubricate the ball mechanism in the gear shift levers.
    Specifically, which manufacturers and in which vehicles?

    Polyurea greases are generally more durable - they are resistant to aging, environmental influences (humidity, UV, temperature). It is just a carrier - the proper lubricant is almost always oil, or some friction modifiers - PTFE, Mos2 or other inventions.
  • #16 19270688
    andexp
    Level 23  
    Under the number G052142A2, a polyurea grease for the lubrication of plastic components is available in VW showrooms. The price is a bit prohibitive, but it's worth it (a 400g cartridge costs about 270 PLN). With reasonable use "you put where you need to" lasts a really long time.

Topic summary

The discussion centers on the best grease options for the air mixer flaps in an Audi A4 B5, particularly focusing on heat resistance and the ability to avoid dirt accumulation. Users recommend avoiding molybdenum disulfide grease due to its potential to react negatively with plastics. Instead, options such as white lithium grease with PTFE, dry PTFE grease, and PTFE silicone grease are suggested. The consensus leans towards dry PTFE grease for its durability and cleanliness, as it does not attract dirt and remains stable under heat. Additionally, polyurea grease is mentioned as a long-lasting option available from VW dealerships, although it is noted to be more expensive.
Summary generated by the language model.
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