1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. Welcome To LandyZone!

    LandyZone is the biggest Land Rover forum on the net. We have plenty of very knowledgable members so if you have any questions about your Land Rover or just want to connect with other Landy owners, you're in the right place.

    Registering is free and easy just click here, we hope to see you on the forums soon!

P38A Air con fans

Discussion in 'Range Rover' started by Henry_b, Mar 16, 2020.

< Previous Thread | Next Thread >
  1. Henry_b

    Henry_b SPARES OR REPAIR

    Joined:
    Jan 29, 2018
    Posts:
    11,751
    Likes Received:
    10,244
    Location:
    Hereford****e
    Mine have melted.

    However I seem to see a few diesel owners who use the aircon fans instead of the viscous.

    Thinking out loud, would it be good enough for the V8?

    Gents.
     
    Grrrrrr likes this.
  2. kermit_rr

    kermit_rr Well-Known Member

    Joined:
    Dec 9, 2018
    Posts:
    7,879
    Likes Received:
    5,129
    Location:
    North Shropshire
    i need to get air installed on mine yet, got the fans, no condensing radiator.
    don't think i'd like to ditch the viscous fan
     
  3. Datatek

    Datatek Well-Known Member

    Joined:
    Feb 5, 2009
    Posts:
    36,896
    Likes Received:
    3,879
    Location:
    Near Poitiers SW France
    OK as back for when the viscous fails not sufficient on there own unless you fit an extra fan as Mark Piercy has done.
     
    Mark Piercy likes this.
  4. Datatek

    Datatek Well-Known Member

    Joined:
    Feb 5, 2009
    Posts:
    36,896
    Likes Received:
    3,879
    Location:
    Near Poitiers SW France
    Te aircon fans work well on the diesel most modern cars use electric cooling fans. Th car is quieter and warms up quicker in winter plus plenty of work space for belt, water pump or stat replacement etc
     
    Mark Piercy and kermit_rr like this.
  5. kermit_rr

    kermit_rr Well-Known Member

    Joined:
    Dec 9, 2018
    Posts:
    7,879
    Likes Received:
    5,129
    Location:
    North Shropshire
    whats considered a max safe operating temp for the 3.9/4.0/4.6 V8 and at what temp would you have the elec fans come on? 'stat fully opens at 92c IIRC
     
  6. Datatek

    Datatek Well-Known Member

    Joined:
    Feb 5, 2009
    Posts:
    36,896
    Likes Received:
    3,879
    Location:
    Near Poitiers SW France
    The stat should be set so that the fans come on when the temperature rises above normal, so that would be 95/98 I would guess in your case. My diesels run at 95C fans come on at 98/100.
    The aircon fans are only suitable as back up to the viscous on the V8 unless you fir an additional fan.
     
    kermit_rr likes this.
  7. wammers

    wammers STILL BREATHING. Donater

    Joined:
    Oct 19, 2008
    Posts:
    57,994
    Likes Received:
    11,469
    Location:
    Preston Lancs.
    The V8 already has a facility to automatically switch on air con fans to assist cooling in the case of an overheat. Diesels have same facility from 1999 onwards.
     
    Henry_b and kermit_rr like this.
  8. Datatek

    Datatek Well-Known Member

    Joined:
    Feb 5, 2009
    Posts:
    36,896
    Likes Received:
    3,879
    Location:
    Near Poitiers SW France
    Trouble is on the diesel, by the time the overheat sensor activates the fans it's too late.
     
  9. Henry_b

    Henry_b SPARES OR REPAIR

    Joined:
    Jan 29, 2018
    Posts:
    11,751
    Likes Received:
    10,244
    Location:
    Hereford****e
    Thats handy.. :D
     
  10. wammers

    wammers STILL BREATHING. Donater

    Joined:
    Oct 19, 2008
    Posts:
    57,994
    Likes Received:
    11,469
    Location:
    Preston Lancs.
    Unless there is a system leak there should be no problem. With a correctly working cap the boiling point is just over 240 F or 115 C. The overheat circuit is activated at 105 C.
     
  11. kermit_rr

    kermit_rr Well-Known Member

    Joined:
    Dec 9, 2018
    Posts:
    7,879
    Likes Received:
    5,129
    Location:
    North Shropshire
    wouldnt like to let my v8 reach 100c i'd want extra fans to come on at 95/6c
     
  12. Datatek

    Datatek Well-Known Member

    Joined:
    Feb 5, 2009
    Posts:
    36,896
    Likes Received:
    3,879
    Location:
    Near Poitiers SW France
    Except the sensor seems to be +/- 10%, the one in my car operated nearer 115C than 105C, late enough for it to boil.
     
  13. Datatek

    Datatek Well-Known Member

    Joined:
    Feb 5, 2009
    Posts:
    36,896
    Likes Received:
    3,879
    Location:
    Near Poitiers SW France
    The stat I use is adjustable.
     
  14. wammers

    wammers STILL BREATHING. Donater

    Joined:
    Oct 19, 2008
    Posts:
    57,994
    Likes Received:
    11,469
    Location:
    Preston Lancs.
    With a properly maintained sealed system there should be no problem. If the system is not maintaining pressure then there would be.
     
  15. kermit_rr

    kermit_rr Well-Known Member

    Joined:
    Dec 9, 2018
    Posts:
    7,879
    Likes Received:
    5,129
    Location:
    North Shropshire
    nothing wrong with the system, i just dont wish another cracked block
     
  16. Mark Piercy

    Mark Piercy Well-Known Member

    Joined:
    Jul 11, 2016
    Posts:
    6,354
    Likes Received:
    2,597
    Location:
    sud ouest France
    You can tune the adjustable thermostat somewhere near with a dot lazer temperature (thingywhatsitcalled) . I'd rather it came on a little sooner rather than later. :cool:
     
< Previous Thread | Next Thread >