Welcome to ZRoadster.org - BMW Z1 Z4 Z8 Z3 Forum and Technical Database

If you want to join in with the discussion, and see the areas which are available only to members then sign up now!

  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

COOLING SYSTEM THERMOSTAT

Discussion in 'Introduce Yourself!' started by Fernox, Nov 12, 2019.

  1. Fernox

    Fernox Newbie

    Joined:
    Nov 12, 2019
    Messages:
    9
    Likes Received:
    1
    Trophy Points:
    3
    Hi everybody,

    I am new to this forum and I need some technical information.
    My wife's Z4 ( 2011 E84 sDrive 23i) engine is not reaching normal running temperature according to the oil temperature gauge. This has become more noticeable with the cold weather. The heating system is slow to come when starting off on a trip.
    I think it is the cooling system thermostat that is failing. Although I am quite capable of doing the job of replacing it and I have the equipment, I cannot locate the thermostat housing.
    Can anyone please tell me where this is located before I start dismantling things?

    Regards, Colin
     
  2. jonco

    jonco Zorg Guru (III)
    Supporter British Zeds The M44 Massive

    Joined:
    Dec 6, 2011
    Messages:
    1,389
    Likes Received:
    691
    Trophy Points:
    149
    Location:
    Chester
    Model of Z:
    '98 1.9 Auto
  3. t-tony

    t-tony Zorg Expert (I)
    Supporter British Zeds #ZedShed

    Joined:
    Dec 31, 2013
    Messages:
    34,156
    Likes Received:
    15,937
    Trophy Points:
    220
    Location:
    Torksey Lock,Lincoln, England
    Model of Z:
    Z4 3.0 Auto
    Show us a picture of the front of the engine Colin. Where are you located please?

    Tony.
     
  4. Shelly

    Shelly Zorg Expert (I)
    Supporter British Zeds East Anglian Crew

    Joined:
    Jul 9, 2013
    Messages:
    18,966
    Likes Received:
    7,445
    Trophy Points:
    201
    Location:
    Norfolk
    Model of Z:
    Z4 2.0 20i M Sport sDrive
    :welcome: Hi and welcome to ZroadSter :coolsteer)
     
    • Thank You! Thank You! x 1
  5. Fernox

    Fernox Newbie

    Joined:
    Nov 12, 2019
    Messages:
    9
    Likes Received:
    1
    Trophy Points:
    3
    • Like Like x 1
  6. Slam

    Slam Zorg Guru (IV)
    Supporter British Zeds

    Joined:
    May 24, 2017
    Messages:
    3,036
    Likes Received:
    760
    Trophy Points:
    150
    Location:
    SE London/Kent borders
    Model of Z:
    Z3 2.8 & Z4 coupe
    Hi and welcome from London
     
    • Thank You! Thank You! x 1
  7. Fernox

    Fernox Newbie

    Joined:
    Nov 12, 2019
    Messages:
    9
    Likes Received:
    1
    Trophy Points:
    3
    IMG_20191112_190747315.jpg IMG_20191112_191012097.jpg
     

    Attached Files:

  8. t-tony

    t-tony Zorg Expert (I)
    Supporter British Zeds #ZedShed

    Joined:
    Dec 31, 2013
    Messages:
    34,156
    Likes Received:
    15,937
    Trophy Points:
    220
    Location:
    Torksey Lock,Lincoln, England
    Model of Z:
    Z4 3.0 Auto
    That looks like the 2.5Si motor going on the rocker cover.

    Tony.
     
  9. Chaz Ricorn

    Chaz Ricorn Dedicated Member
    Supporter

    Joined:
    Dec 5, 2018
    Messages:
    155
    Likes Received:
    89
    Trophy Points:
    43
    Model of Z:
    Z4 3.0Si Sport
    • Like Like x 2
  10. Fernox

    Fernox Newbie

    Joined:
    Nov 12, 2019
    Messages:
    9
    Likes Received:
    1
    Trophy Points:
    3
    Hi Chaz,

    Thanks for that. The engine set-up in the video looks very much like our Z4's set-up.
    It all looks do-able apart from the recoding bit.
    Do you know if the recoding is necessary when only the thermostat is replaced?

    Regards, Colin
     
  11. Fernox

    Fernox Newbie

    Joined:
    Nov 12, 2019
    Messages:
    9
    Likes Received:
    1
    Trophy Points:
    3
    Hi Chaz,
    Thanks for that. I don't know what happened to my first reply.
    That set-up looks very similar to our Z4's set-up.
    It looks do-able apart from the recoding bit for the water pump.
    Do you know if the recoding is necessary when only the thermostat is replaced?

    Regards, Colin
     
  12. Chaz Ricorn

    Chaz Ricorn Dedicated Member
    Supporter

    Joined:
    Dec 5, 2018
    Messages:
    155
    Likes Received:
    89
    Trophy Points:
    43
    Model of Z:
    Z4 3.0Si Sport
    I think the recoding is only necessary if you've had a fault code logged, and all you need to do is clear the fault codes.
     
    • Thank You! Thank You! x 1
  13. Mint

    Mint Zorg Expert (I)
    Supporter British Zeds East Anglian Crew

    Joined:
    Sep 23, 2012
    Messages:
    10,083
    Likes Received:
    6,784
    Trophy Points:
    222
    Location:
    Staffordshire, UK
    Model of Z:
    1st Z3 | 2.2 | Sport | Individual 2nd - Z3 | 3.0 | Sport
    Hi @Fernox, :welcome: to the forum from me too in Staffordshire. Z3 man myself but plenty of Z4 gurus on here as well:thumbsup:
     
    • Thank You! Thank You! x 1
  14. Fernox

    Fernox Newbie

    Joined:
    Nov 12, 2019
    Messages:
    9
    Likes Received:
    1
    Trophy Points:
    3
    Hi all,
    BMW Z4 E84 2011 Sdrive 23i

    The thermostat seems to be located down at the bottom right hand side of the engine when sitting in the car. It looks almost impossible to get at. There is a heavy duty cross-beam running just beneath it and no access from above.
    I need to know which direction to approach it, either from below or from above and front of the engine. Either way involves serious dismantling.
    The U tubes that I have seen deal with other models which look much more accessible.
    Regards, Colin
     
  15. Chaz Ricorn

    Chaz Ricorn Dedicated Member
    Supporter

    Joined:
    Dec 5, 2018
    Messages:
    155
    Likes Received:
    89
    Trophy Points:
    43
    Model of Z:
    Z4 3.0Si Sport
    When I had mine done I asked the guy how difficult and he reckoned it was not easy but definetly from underneath.
     
    • Thank You! Thank You! x 1
  16. Fernox

    Fernox Newbie

    Joined:
    Nov 12, 2019
    Messages:
    9
    Likes Received:
    1
    Trophy Points:
    3
  17. Fernox

    Fernox Newbie

    Joined:
    Nov 12, 2019
    Messages:
    9
    Likes Received:
    1
    Trophy Points:
    3
    The two bolts facing you in the first picture are the bolts that hold the thermostat to the water pump. I found that although it was very difficult to disconnect the four pipes and electric cable and remove the thermostat it became much easier after I had removed these two bolts which allowed me to moved the thermostat about somewhat to get at the pipe clips (two jubilee type and two wire spring clips with O ring seals).
    Surprisingly I found it relatively easy to fit the new thermostat.
    I have driven the car up and down the lane about 4 to 5 miles and the oil temperature gauge is still not reaching 120 deg. as normal.
    The car is only used for day trips on fine days (2011 and 26 thou. miles) so I will wait for the next opportunity to try it out.

    Regards, Colin
     
  18. Nodzed

    Nodzed Zorg Guru (V)
    Supporter British Zeds #ZedShed M Power

    Joined:
    Feb 18, 2016
    Messages:
    5,954
    Likes Received:
    3,606
    Trophy Points:
    196
    Location:
    Forest of Dean
    Model of Z:
    Z3M Roadster
    Just read this are we talking e89 Z4? If so then mine (2.3) never gets to 120 degrees on oil temp not even in 45 degree heat in Italy sits around 90-100 just left of centre on the gauge depending on ambient temp and driving style. Btw heater is toasty hot
     
  19. t-tony

    t-tony Zorg Expert (I)
    Supporter British Zeds #ZedShed

    Joined:
    Dec 31, 2013
    Messages:
    34,156
    Likes Received:
    15,937
    Trophy Points:
    220
    Location:
    Torksey Lock,Lincoln, England
    Model of Z:
    Z4 3.0 Auto
    I think this is an E89 Z4 Niall. Nothing looks familiar to me from E85/6 cars. Would help to know where @Fernox is located.

    Tony.
     
  20. Nodzed

    Nodzed Zorg Guru (V)
    Supporter British Zeds #ZedShed M Power

    Joined:
    Feb 18, 2016
    Messages:
    5,954
    Likes Received:
    3,606
    Trophy Points:
    196
    Location:
    Forest of Dean
    Model of Z:
    Z3M Roadster
    Assumed so Tony but this confused me My wife's Z4 ( 2011 E84 sDrive 23i)
     
    • Agree Agree x 1