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hi guys. can any tech guys tell me if a 250 aircon has a clutch

Discussion in 'Mechanical - Engine, Gearbox, Exhaust etc' started by rockabilly, Apr 23, 2020.

  1. Apr 23, 2020 #1
    rockabilly

    rockabilly

    as above. does the aircon compressor have a clutch like old school or are they new school running all the time regardless. cars a 10 plate 250rs..cheer bernie
     
  3. Apr 23, 2020 #2
    ianplymouth

    ianplymouth RSM Club Member

    Yes it does, the pumps on the mk2 and mk3 are the same as well
     
  4. Apr 23, 2020 #3
    rockabilly

    rockabilly

    ta ian. so when i engage aircon i should hear it?.
     
  5. Apr 23, 2020 #4
    ianplymouth

    ianplymouth RSM Club Member

    no not necessarily, you will need to look at the clutch if it's not spinning it's not working, the pulley spins all the time the engine is running, the air con pump doesn't run all the time, it will pulse when the air con is on, but should run for a couple of minutes when it's first switched on.
     
  6. Apr 23, 2020 #5
    rockabilly

    rockabilly

    so had mine running with the wheel arch cover of. looked at the front of the clutch pulley. aircon on or off it spins. rad fan on slow but no cool air?.
     
  7. Apr 23, 2020 #6
    rockabilly

    rockabilly

    see on the front clutch type usually have two or three what look like straps. mine doesnt its a smooth face pulley with what looks like a square nut in the centre
     
  8. Apr 23, 2020 #7
    ianplymouth

    ianplymouth RSM Club Member

    so the whole thing is turning ????
    if the engine is stopped, can you turn the clutch the outside bit
     
  9. Apr 23, 2020 #8
    rockabilly

    rockabilly

    this is a clutch drive. but mine isnt like this one s-l1600.jpg
     
  10. Apr 23, 2020 #9
    ianplymouth

    ianplymouth RSM Club Member

    Can you take a picture of it, sounds like the clutch is broken, if you can send a pic i can then tell you if its good or not
     
  11. Apr 23, 2020 #10
    ianplymouth

    ianplymouth RSM Club Member

    i'm wondering if someone has stripped it in the past, is there still the plug and wire on the pump ???
     
  12. Apr 23, 2020 #11
    rockabilly

    rockabilly

    more like this one s-l1600 (2).jpg
     
  13. Apr 23, 2020 #12
    rockabilly

    rockabilly

    it has a two pin grey plug with what looks like a yellow wire and a blue wire.

    same plug arrangement as pic above with the black wire going down to the round unit

    i have not removed it yet but would say the one above is identical to mine

    and this is the description of the one above on ebay

    Renault Megane mk3 / Scenic mk3 Air Con A/C Pump Compressor 8200939386
     
  14. Apr 23, 2020 #13
    ianplymouth

    ianplymouth RSM Club Member

    that's not a standard Megane air con pump, does the bolt in the middle turn when the engine is running
     
  15. Apr 23, 2020 #14
    rockabilly

    rockabilly

    no
     
  16. Apr 23, 2020 #15
    ianplymouth

    ianplymouth RSM Club Member

    okay, thats the pump not working then, can you turn the shaft by hand, or put a spanner on it, it should turn easy
     
  17. Apr 23, 2020 #16
    rockabilly

    rockabilly

    will try that tommorrow ian
    is there a fuse for the compressor
     
  18. Apr 23, 2020 #17
    ianplymouth

    ianplymouth RSM Club Member

    I would have thought so, but which one it is i don't know.
     
    rockabilly likes this.
  19. Apr 24, 2020 #18
    rockabilly

    rockabilly

    right so. the centre moves freely as in the square nut. this is indeed a clutchless compressor. stripped battery out, top intercooler hose, and peeled some loom tape. the colours on the compressor are deffo yellow and blue 2 wires. but i could only find two wires in the harness that matched both yellow no blue doh.gonna need to send to renault for a diagnosis i think
     
  20. Apr 25, 2020 #19
    rockabilly

    rockabilly

    so to update. mate came up with renault clip/ everything is working just no cold air. compressor gates a signal and still nothing . so we are going to replace the compressor next couple of weeks. anyone done this. looks like a front end of job to me.real pain.lol
     
  21. Apr 25, 2020 #20
    ianplymouth

    ianplymouth RSM Club Member

    You might be able to get your hands in to get the bolts out, there are three long bolts that hold the pump onto the engine block, two 10mm headed bolts that hold the feed and return pipes to the pump and a electrical connector.

    You will have to get the under tray off and go in from the bottom, if you can't get it off that way, it's going to be bumper off, intercooler off, radiator off and the crash bar,then you can get to the pump.

    If you go back to the place that charged the air con, they can drain the system down and save the gas.
     
  22. Apr 25, 2020 #21
    rockabilly

    rockabilly

    cheers ian. thats what im doin. nick,s a friend who gassed it. so he will remove it for free he said. got the tray off. gonna remove oil filter and sandwich plate for cooler and go in that way. wheel arch liner off and belt of see how we go. will update when im done. probably a couple of weeks now.lol
     
  23. Apr 25, 2020 #22
    rockabilly

    rockabilly

    looking at it. the top aircon pipe will need to come off deffo but the bottom one on the flexi will be easier when i drop if off to remove
     
  24. Apr 25, 2020 #23
    ianplymouth

    ianplymouth RSM Club Member

    Yes Sorry obviously the belt has to come off, i have never removed one while the engine is in the car :laughing::laughing:

    should be doable though :sunglasses:
     

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