rad trouble

  1. Newbie Joined: Oct 2011 Posts: 6
    #1
    ive got a 1.6 vtr, w-reg.

    just put a new rad on and when ive filled it up and bled the air out the top hose is getting hot but the bottom 1 is still cold and the fan isnt cutting in even when the temp is in the red, ive had the hose on the rad so theres no blockage in there.
    any ideas would be gratefully received.
  2. Saxperience Forum Bum Joined: Mar 2011 plymouth Posts: 2921 mk2 VTS
    #2
    thermostat mate i had this prob
  3. Saxperience Forum Bum Joined: Oct 2009 Torquay Posts: 2930 MK2 saxo vtr
    #3
    Quote:
    Originally Posted by sam_8v View Post
    thermostat mate i had this prob
    +1 to this.

    pop a new stat on and it'll be fine.
  4. Newbie Joined: Oct 2011 Posts: 6
    #4
    would that stop the fan from cutting then, it used to run ok before.
  5. Saxperience Forum Bum Joined: Oct 2009 Torquay Posts: 2930 MK2 saxo vtr
    #5
    Quote:
    Originally Posted by paul1970 View Post
    would that stop the fan from cutting then, it used to run ok before.
    It'll allow the cooling system to work properly. Sounds as it's blocked/not opening as the top hose was cold.
  6. Newbie Joined: Oct 2011 Posts: 6
    #6
    its the bottom hose thats cold and the top thats hot mate.
  7. Saxperience Forum Bum Joined: Oct 2009 Torquay Posts: 2930 MK2 saxo vtr
    #7
    Quote:
    Originally Posted by paul1970 View Post
    its the bottom hose thats cold and the top thats hot mate.
    When you start up from cold, does it sound like there is running water?

    Sounds like a air lock.
  8. Newbie Joined: Oct 2011 Posts: 6
    #8
    i bled the air out at the valve on the top of the rad a few times while it was running.not heard anything like running water tho.
  9. Regular Poster Joined: Sep 2011 Wirral Posts: 280 desire
    #9
    Quote:
    Originally Posted by paul1970 View Post
    i bled the air out at the valve on the top of the rad a few times while it was running.not heard anything like running water tho.
    That's the first bleed point, when no air coming out of that then do the thermostat housing bleed point (allen bolt), when no air coming out of that then do the bleed point on the hose by the ecu, as this one is higher than the rad fill you need to use a header tank (put this on first) keep the header tank on until the fan cuts in 3 times. Did mine the other day and it took ages to bleed it properly.
  10. Saxperience Forum Bum Joined: Oct 2009 Torquay Posts: 2930 MK2 saxo vtr
    #10
    Quote:
    Originally Posted by bosax View Post
    That's the first bleed point, when no air coming out of that then do the thermostat housing bleed point (allen bolt), when no air coming out of that then do the bleed point on the hose by the ecu, as this one is higher than the rad fill you need to use a header tank (put this on first) keep the header tank on until the fan cuts in 3 times. Did mine the other day and it took ages to bleed it properly.
    That would do the trick.
  11. Newbie Joined: Oct 2011 Posts: 6
    #11
    all sorted chaps, it was the bleed nipple at back on the left hand side, the 1 like a dust cap, it was a massive airlock, got 2nd degree burns on my hand and up my arm to prove it too haha, got a couple ofdays off work tho, result.
  12. Saxperience Forum Bum Joined: Oct 2009 Torquay Posts: 2930 MK2 saxo vtr
    #12
    Quote:
    Originally Posted by paul1970 View Post
    all sorted chaps, it was the bleed nipple at back on the left hand side, the 1 like a dust cap, it was a massive airlock, got 2nd degree burns on my hand and up my arm to prove it too haha, got a couple ofdays off work tho, result.
    LOL. Pics are needed.

    But yeah, I burnt my little pinky when I did mine.
  13. Regular Poster Joined: Sep 2011 Wirral Posts: 280 desire
    #13
    Been there done that............. I wore marigolds this time
  14. Newbie Joined: Oct 2011 Posts: 6
    #14
    I'll get the pics on tomoz, they're not for the faint hearted tho I can tell u haha