New Sanden AC Compressor won't turn - help!! | FerrariChat
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New Sanden AC Compressor won't turn - help!!

Discussion in '308/328' started by chairpilot, Aug 11, 2012.

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  1. chairpilot

    chairpilot Formula 3

    Mar 3, 2007
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    PlateClipGuys
    #1 chairpilot, Aug 11, 2012
    I just finished replacing the hoses, pressure checked the evaporator and condenser while out (both excellent). Put in all new hoses including the two long runs. All new green O rings. Pulled a vacuum down to 30+" (on my gauge it was 2 needles past 30") and held over night. Charged the system with just under 2 cans. Started it up and the compressor did not turn when the clutch engaged. Belt squealed and I shut it down immediately. I recovered the freon and removed the compressor. Bench tested it and it turned by hand fine with clutch engaged. Removed and then refilled the oil. With the freon removed and hoses detached from the compressor, I blew compressed air through the system (high to low) and there is no blockage. Put the compressor back on and got the belt tensioned back to 50 lbs (per spec - just like I did initially). With NO FREON in the system but the hoses attached (so I would not spray oil everywhere) the compressor will still not turn over with the clutch engaged.
    While on the bench I turned it the correct way (counter clockwise when facing the pulley) and oil was popping out the high side. That tells me the compressor is not "reversed".
    VERY FRUSTRATED as I was trying to get this working for my drive up to Monterey Wednesday
    What am I doing wrong or missing???
     
  2. F1Austin

    F1Austin Karting

    Apr 29, 2012
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    Pat Welch
    #2 F1Austin, Aug 11, 2012
    Last edited by a moderator: Sep 7, 2017
    My mechanic,Regis is installing the retro-air kit on my QVeuro that I recently bought from carreapper. He mentioned that the compressor that is supplied is a reverse spin.He agree's with Fastradio that its not really a kit but a bunch of parts that fit pretty good but need a lot of TLC...The big problem w/308 air is the lack of cabin bulkhead insulation..FWIW...Hes got the compressor installed and was put out that he has to hunt for a belt,,,sorry no compressor pic yet
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  3. chairpilot

    chairpilot Formula 3

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    #3 chairpilot, Aug 11, 2012
    I've got everything in and fitted perfect. I went through 3 belt sizes before I ended up with the 11M850 which is the only one that would tension up to OEM specs.

    My only problem now is the compressor won't turn when the clutch is activated. Immediately a dead stop and the belt skreeches.
     
  4. Jeka

    Jeka Formula 3
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    Nov 20, 2010
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    Johan
    #4 Jeka, Aug 12, 2012
    The only real difference with bench testing is the 50 lbs radial force on the pulley? Maybe the problem is there.
     
  5. don_xvi

    don_xvi F1 Rookie

    Nov 1, 2003
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    #5 don_xvi, Aug 12, 2012
    -Speed related?
    -Belt pull related?
    -Belt torque related?
    -Tensioner?

    When you spun it by hand on the bench, were you grabbing the pulley? Can you rig something up on you bench to use a drill, either from the face or (preferably) with a belt setup to try & spin it up? I can see myself securing the compressor and putting a hole saw on a drill to act as a pulley and wearing out the bearings on the drill trying to tension the belt.

    We frequently discuss seizing timing belt tensioners on here. Are you certain the compressor was stopped rather than the tensioner making all of the noise?
     
  6. Steve King

    Steve King F1 Rookie

    Feb 15, 2001
    4,367
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    #6 Steve King, Aug 12, 2012
    If you put 12V on the clutch without the belt does the pulley spin. Make sure you have no mechanical issues.
     
  7. jfrazar

    jfrazar Karting
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    Jun 26, 2004
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    Joe Frazar
    #7 jfrazar, Aug 12, 2012
    The pulley will spin freely until the clutch is engaged. Are you spinning the inside part of the compressor clutch only? That is a hard connection to the compressor pistons inside. - 2 are you sure that the clutch is not jaming up against the timing belt cover and jaming against that - tight fit between the belt cover and the fuel tank. If you remove the compressor again - remove the head make sure you don't have an internal jam.

    Joe Frazar
     
  8. chairpilot

    chairpilot Formula 3

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    #8 chairpilot, Aug 12, 2012
    Resolved the problem. Even though I installed the kit per the instructions, the compressor/York adapter plate only allowed for belt alignment with the inner of the two pulleys (bad bad bad). The clutch face was indeed just touching the timing belt case in this condition. Sliding the compressor back only created belt/pulley missalignment. I had to modify the adapter plate to allow the plate to slide towards the fuel tank about 15 mm so to allow the outer pulley to align with the crank and tensioner pulleys. A real PIA!!! And no, reversing the plate was way worse.
    AC working fine now!
     
  9. jfrazar

    jfrazar Karting
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    #9 jfrazar, Aug 13, 2012
    We always run the belt on the outer most pulley. We use washers to shim fit the compressor for correct alignment. Bit of trial and error but has worked on many many cars. Glad you solved the problem.

    Joe Frazar
     
  10. Sean F.

    Sean F. F1 Rookie

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    #10 Sean F., Aug 13, 2012
    Understatement of the year! :)
     
  11. mike996

    mike996 F1 Veteran

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    #11 mike996, Aug 13, 2012
    "Bit of trial and error but has worked on many many cars"

    "Ferrari" + "Bit of trial and error" is redundant :)
     
  12. FasterIsBetter

    FasterIsBetter F1 Veteran

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    #12 FasterIsBetter, Aug 13, 2012
    Isn't that how Enzo built them -- a bit of trial and error, and leave it to the customer to sort it out?? And you wonder where the reputation came from that to own a Ferrari you either had to be a mechanic or own one.
     
  13. chairpilot

    chairpilot Formula 3

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    #13 chairpilot, Aug 13, 2012
    That should be written into the owners manuals.
     
  14. FasterIsBetter

    FasterIsBetter F1 Veteran

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    #14 FasterIsBetter, Aug 13, 2012
    It is. Look up warranty in the owners manual. It reads (written for them by Seinfeld's Soup Nazi):

    WARRANTY: You want a warranty? If you can afford one or our cars, you can afford to fix it yourself. No warranty for you!! Come back, one year!!

    Don't know how you missed that one. LOL
     

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