Coolant expansion tank cap is leaking

  1. Newbie Joined: Aug 2012 Blandford, Dorset Posts: 5 Saxo VTR 03 Cammed
    #1
    I seem to loosing a lot of water (not steam) coming from the top of the cap. The seal doesn't seem to have deteriorated but its not doing its job.

    I have a saxo vtr 1.6 03 cammed

    Any ideas on where I could get this cap? or some sort of solution?

    Cheers
  2. Saxperience Post Whore Joined: Mar 2009 Uppingham, Rutland Posts: 9569 mk1 JP4'd VTR, '16 Fabia Monte Carlo
    #2
    its a presure release cap so it will let water out if it exceeds its pressure limit so it seems to be soemthing wrong with your coolant system (if your convinced your cap is fine), does the car over heat?
  3. Saxperience Hardcore! Joined: Oct 2008 Birtley Posts: 22253 VTR Turbo, 106 xsi track slag, Transit recovery, B
    #3
    check the oil filler cap for sludge/mayo

    sounds like head is pressurising your water..eg heag gasket gone

    get a compression test done
  4. Saxperience Post Whore Joined: May 2009 ringwood Posts: 6305 suzuki swift 1.2 sz3
    #4
    You bled the system?
  5. Newbie Joined: Aug 2012 Blandford, Dorset Posts: 5 Saxo VTR 03 Cammed
    #5
    Quote:
    Originally Posted by jeffchiz View Post
    its a presure release cap so it will let water out if it exceeds its pressure limit so it seems to be soemthing wrong with your coolant system (if your convinced your cap is fine), does the car over heat?
    Yeah the car overheats often when stationary but not when moving, I never let the water exceed the max.. so im not sure why there's so much pressure there for it to be spitting it back out
  6. Saxperience Post Whore Joined: Mar 2009 Uppingham, Rutland Posts: 9569 mk1 JP4'd VTR, '16 Fabia Monte Carlo
    #6
    try bleeding the car first remove all air fromt he system always the best place to start, takes a couple min to do and is free lol

    but as said if the h/g has gone then the coolant system will be pressurised, my car overheated when stationary but once i bled it again has been fine ever since
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  7. Saxperience Hardcore! Joined: Mar 2008 Posts: 31279 Citroen Saxo VTS, S60 D5
    #7
    Well if its moving its getting cool air lol.

    Defo get it checked before its too late IMO.
  8. Saxperience Post Whore Joined: May 2009 ringwood Posts: 6305 suzuki swift 1.2 sz3
    #8
    Where about in dorset are you? You Could always pop round and I'll have a ganders.
  9. Newbie Joined: Aug 2012 Blandford, Dorset Posts: 5 Saxo VTR 03 Cammed
    #9
    okay thanks mate
  10. Saxperience Hardcore! Joined: Oct 2008 Birtley Posts: 22253 VTR Turbo, 106 xsi track slag, Transit recovery, B
    #10
    how long has it been cammed
  11. Newbie Joined: Aug 2012 Blandford, Dorset Posts: 5 Saxo VTR 03 Cammed
    #11
    Quote:
    Originally Posted by blackie_2k5 View Post
    how long has it been cammed
    It was cammed in 2006 with Newman PH3
  12. Saxperience Hardcore! Joined: Oct 2008 Birtley Posts: 22253 VTR Turbo, 106 xsi track slag, Transit recovery, B
    #12
    ahh i see

    it sounds like head gasket tbh..but as said..empty and bleed the system

    check the oil and filler cap..

    and if its still happening take it for a compression test


    when the head gasket goes..the compression from the cylinders blow the water out the cooling system if its leaked between a water gallery
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  13. Newbie Joined: Aug 2012 Blandford, Dorset Posts: 5 Saxo VTR 03 Cammed
    #13
    Quote:
    Originally Posted by wadoryu View Post
    Where about in dorset are you? You Could always pop round and I'll have a ganders.
    I live in Blandford, will try re-bleeding the rad first. But might get back to you if the problem is still there.
    Cheers
  14. Saxperience Post Whore Joined: Jan 2008 ..... Posts: 5231 ..............
    #14
    just because the seal looks ok, does not mean you can rule it out.

    get a new one, they are around £5. its worth a try.

    if not, bled the system. If not, compression test. check results.