Results 1 to 21 of 21
  1. #1
    Join Date
    May 2011
    Location
    turkey
    Posts
    135
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default 155 Q4 viscous coupling testing..

    hi guys
    today i tested viscous coupling on my car..it is good condution..
    [ame="http://www.youtube.com/watch?v=UORCFe8W4SE"]Alfa Romeo 155 Q4 viscouse couple testing - YouTube[/ame]

  2. #2
    Join Date
    Apr 2006
    Location
    Bournemouth UK
    Posts
    4,770
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Rides
    1

    Default

    Interesting method. Not sure its in the workshop manual though.
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  3. #3
    Join Date
    May 2011
    Location
    turkey
    Posts
    135
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    yeah Steve..you are right..but it is simple

  4. #4
    Join Date
    Jun 2006
    Location
    istanbul
    Posts
    132
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    if rear turn free and car doesnt move, your VC is dead

    nick, your rear faster than front ?
    Im not sure this is correct?

    this name is Jack test
    be carrefuly when you test

    here you find some bmw jack test video
    you know bmw 325ix 4whell drive


    [ame="http://www.youtube.com/watch?v=BYQr-sNXZps"]BMW E30 325ix Jack Test - YouTube[/ame]
    [ame="http://www.youtube.com/watch?v=oGStw9TneN4&feature=related"]BMW 325ix jack test 2 - YouTube[/ame]
    [ame="http://www.youtube.com/watch?v=a4exvt2_Yjc&feature=related"]BMW 325 iX 4wd-test - YouTube[/ame]
    [ame="http://www.youtube.com/watch?v=4cbGeSJ9dHc&feature=related"]BMW 325iX VC test - YouTube[/ame]



    [ame="http://www.youtube.com/watch?v=9B0ANOI3GcM"]BMW e30 325IX Transfer Case and Viscous Coupling Test - YouTube[/ame]
    Last edited by MaxiBoost; 31-08-12 at 06:27.

  5. #5
    Join Date
    May 2011
    Location
    turkey
    Posts
    135
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    i am not sure front and rear equal speed.

  6. #6
    Join Date
    Apr 2006
    Location
    Bournemouth UK
    Posts
    4,770
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Rides
    1

    Default

    I can't remember the figure, but I think the workshop method involves jacking one front wheel up and using a socket and bar type torque wrench on a wheel nut, turning the front wheel and seeing what torque it takes to move it.
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  7. #7
    Join Date
    Jan 2007
    Location
    Derbyshire, UK
    Posts
    3,080
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    Does if the jack test account for load on a worn VC? I think the method described by Steve is better...although not as immediate!

    wrinx
    My Q4 in the Garage

    www.alfaromeo155.co.uk ............................ □□□-V-□□□ .................................. www.ilmostro.co.uk

  8. #8
    Join Date
    Jun 2006
    Location
    istanbul
    Posts
    132
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    Quote Originally Posted by Steve Webb View Post
    I can't remember the figure, but I think the workshop method involves jacking one front wheel up and using a socket and bar type torque wrench on a wheel nut, turning the front wheel and seeing what torque it takes to move it.
    steve
    this is your test I think ?

    [ame="http://www.youtube.com/watch?v=7eoVaHLrjaM"]Freelander(Land Rover) VCU (Viscous Coupling Unit) Test. - YouTube[/ame]



    [ame="http://www.youtube.com/watch?v=Oh01nQgh7z8&feature=related"]Freelander 1 2001 v6 Viscous Coupling Unit VCU Torque Test - One Wheel Up Test - YouTube[/ame]

  9. #9
    Join Date
    Apr 2006
    Location
    Bournemouth UK
    Posts
    4,770
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Rides
    1

    Default

    Yep that's pretty much it but you use a torque wrench to turn the wheel so you can see how much resistance there is.
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  10. #10
    Join Date
    Apr 2006
    Location
    Bournemouth UK
    Posts
    4,770
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Rides
    1

    Default

    Quote Originally Posted by nick View Post
    hi guys
    today i tested viscous coupling on my car..it is good condution..
    Just out of interest, where are you placing the jack? Under the rear diff?
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  11. #11
    Join Date
    May 2011
    Location
    turkey
    Posts
    135
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    hi guys
    we have tested viscous couple yesterday but we can not understand how the condution of viscous couple is?

  12. #12
    Join Date
    May 2011
    Location
    turkey
    Posts
    135
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

  13. #13
    Join Date
    Apr 2006
    Location
    Bournemouth UK
    Posts
    4,770
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Rides
    1

    Default

    It looks to me as though the VC is a little loose, as in the fluid has lost some of its viscosity over the years and the unit might not be locking up as quickly or as solidly as it should be.
    I certainly have to put more effort into moving the wheel when its jacked up, and I can't get it to move as quickly as you did in that last video.

    Have you taken a look at this page on the website? http://www.berlinasportivo.com/pages/coupling1.php
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  14. #14
    Join Date
    May 2011
    Location
    turkey
    Posts
    135
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    i bought new silikon viscous oil..oil is right? any idea?


  15. #15
    Join Date
    May 2011
    Location
    turkey
    Posts
    135
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    hi again
    which silicon oil uses viscous couple? ak 60.000 or ak 100.000 ?

  16. #16
    Join Date
    Apr 2006
    Location
    Bournemouth UK
    Posts
    4,770
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Rides
    1

    Default

    I've just taken a look through this pdf: http://www.berlinasportivo.com/Techn...Drivetrain.pdf

    Section 15 deals with the VC, its got loads of details about checking and adjusting the VC but I can't see anything in there about what fluid to use.

    The number refers to the viscosity or thickness of the fluid, higher the number the more viscous.
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  17. #17
    Join Date
    Jun 2006
    Location
    istanbul
    Posts
    132
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    I change my car`s viscous coupling and share with you
    its very handling now, its very important part.
    Car always oversteer when turn fast cornering before, now its like a train

    You need drive car an half hour before the test. Vc must be come to operating temperature.
    (thanks to @nick and @Barış from subaruimpreza.org forum)




    Jack test:
    wheels must be turn same speed when after car is moving
    [ame]www.youtube.com/watch?v=Qt3jJAPvJ-0[/ame]

    Before
    you can see, rear wheels turn many time
    and after the car move rear wheels turn faster than front.
    [ame="http://www.youtube.com/watch?v=Dwsz9dLYutk"]Alfa 155 Q4 old viscous - YouTube[/ame]


    After
    rear turn just quarter before moving
    then turn same speed front
    [ame="http://www.youtube.com/watch?v=EvAYR8nE4TY"]Alfa 155 Q4 new viscous - YouTube[/ame]



    This is handy check:
    lift car, gear is neutral position and handbrake on (lock rear wheels)

    Before
    [ame="http://www.youtube.com/watch?v=vlqyVUpIO9k"]Alfa 155 Q4 old viscous - YouTube[/ame]

    After
    [ame="http://www.youtube.com/watch?v=_poBMRqSCec"]Alfa 155 Q4 new viscous - YouTube[/ame]


    some pictures about viscous coupling:





  18. #18
    Join Date
    Jan 2007
    Location
    Derbyshire, UK
    Posts
    3,080
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    Thanks for that....I'll be checking mine soon!

    How much is a replacement coupling or refurbishment?

    wrinx
    My Q4 in the Garage

    www.alfaromeo155.co.uk ............................ □□□-V-□□□ .................................. www.ilmostro.co.uk

  19. #19
    Join Date
    Jun 2006
    Location
    istanbul
    Posts
    132
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    Quote Originally Posted by wrinx View Post
    Thanks for that....I'll be checking mine soon!

    How much is a replacement coupling or refurbishment?

    wrinx
    we dont %100 sure
    @nick buy it from itally
    seller tell him: "this is new" .

  20. #20
    Join Date
    Oct 2011
    Location
    Poland
    Posts
    223
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    Quote Originally Posted by MaxiBoost View Post
    we dont %100 sure
    @nick buy it from itally
    seller tell him: "this is new" .

    What kind of silicone oil have You used ?
    (brand/type) will be very helpful

    or meaby someone else can recomend ? something
    as i have everything on the table i will do service for visco also.

    regards

    WS
    "Never take life seriously. Nobody gets out alive anyway."

  21. #21
    Join Date
    Jun 2006
    Location
    istanbul
    Posts
    132
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    Quote Originally Posted by Suzumushi View Post
    What kind of silicone oil have You used ?
    (brand/type) will be very helpful

    or meaby someone else can recomend ? something
    as i have everything on the table i will do service for visco also.

    regards

    WS
    I install new vicouse now (not %100 sure)

    but Im trying 30.000 cst silicon oil before
    30.000cst (30k) very thin, dont use...
    original visco use ~80k silicon oil I think
    so my advice you can use 100k (100000cst) oil

    you never full fill it
    aprox %10-%15 air space need
    put silicon oil %85-%87 in viscous coupling

    and placement important also
    VC have 37 metal plates
    19 plate big (left in picture)
    18 plate small


    You put in case one big plate, one small, than one big, one small
    but I dont know well direction
    its well important too

    last important plate face
    how can I explane it I dont know
    put all plate in case one face

    take a plate your hand
    touch corners and holes and feel it
    one face sharp all plate
    must be all plates face same direction

    ask here any other questions

    hakan

Similar Threads

  1. Alfa 155 Q4 :: 1995 Alfa Romeo 155 Q4
    By Suzumushi in forum The Forum Garage
    Replies: 53
    Last Post: 25-04-15, 17:36
  2. B.S. 155 20th Anniversary
    By Steve Webb in forum The Media Suite
    Replies: 87
    Last Post: 19-06-12, 18:06
  3. Viscous Coupling article.
    By Steve Webb in forum Alfa Romeo Q4 Tech.
    Replies: 12
    Last Post: 22-04-10, 21:09
  4. Body replacement 155 Q4 vs other 155?
    By mindus in forum Alfa Romeo Q4 Tech.
    Replies: 13
    Last Post: 26-09-08, 10:42
  5. Alfa 155 GTA testing
    By Steve Webb in forum The Media Suite
    Replies: 3
    Last Post: 19-08-07, 20:50

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •