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  1. Join Date
    Sep 2006
    Posts
    59
    #1
    Mga Sir, tanong ko lang po kung bakit pag nag slow down takbo ng car ko tumataas ang temp? lalo na pag traffic? tapos pag na pick-up na ng speed bumababa ulit (less than half). Bagong palit radiator cap ko. Anu kaya yung possible na cause?

    Salamat!

  2. Join Date
    Oct 2002
    Posts
    22,658
    #2
    Ako din magtatanong na.

    Lately kapag nasa traffic yung MB100, tumataas ang temp. Pero when I rev the engine continuously (even while stopped in traffic) bumababa ang temp to normal.

    Kapag tumatakbo naman, walang problema sa temp. Kahit sustained 120kph ang takbo.

    Sa traffic lang talaga. Ano kaya problema?

    [edit]: Bago nga pala aux fan ko pero I have been using it for quite sometime already (months na) before this overheating fiasco began.
    Last edited by OTEP; November 2nd, 2006 at 12:33 PM.

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  3. Join Date
    Jun 2005
    Posts
    4,313
    #3
    Something is wrong in the water circulation. Have the radiator checked, baka madumi na ang loob. And also the water pump and the radiator fan.

  4. Join Date
    Oct 2002
    Posts
    22,658
    #4
    Water circulation din ang suspect ko. Was thinking of the water pump since 100,000kms na yung sasakyan and still on the original water pump. Timing chain kasi kaya medyo kinakatamarang buksan unlike sa timing belt na obligado ka magpalit.

    Possible din kaya na yung engine driven fan ang problema?

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  5. Join Date
    Dec 2002
    Posts
    551
    #5
    Or have you checked your aircon condenser baka barado na. When was the last time you had the front washed ? With my car it was also overheating when I had it checked makapal na pala ang dumi sa harapan ng condenser kaya di maka circulate ang hangin

  6. Join Date
    Dec 2005
    Posts
    137
    #6
    Quote Originally Posted by OTEP View Post
    Water circulation din ang suspect ko. Was thinking of the water pump since 100,000kms na yung sasakyan and still on the original water pump. Timing chain kasi kaya medyo kinakatamarang buksan unlike sa timing belt na obligado ka magpalit.

    Possible din kaya na yung engine driven fan ang problema?
    hindi po ba almost lahat ng vans, suvs and commercial vehicles ay equipped with a fan clutch. kung more than 100,000kms na baka kelangan na ng inspection. baka ubos na ang silicone fluid nya.

    The fan clutch allows the fan to turn with the belt at low engine speed and "free-wheel" at higher speeds. A bad fan clutch either doesn't allow the fan to spin at low speed (overheating in traffic) or doesn't allow it to free-wheel at high speed (potential overheating on highway or reduced gas mileage).

  7. Join Date
    Aug 2004
    Posts
    6,234
    #7
    Nag-overheat ako dati right after pinalitan ko ang radiator cap. Nung binalik ko ang lumang cap (buti na lang di ko tinapon) back to normal din ang temp kahit trafik.

    On most cars with motorized fans kung kelangan i-rev para bumaba ang temp most likely water pump na ang problema.
    Last edited by JohnM; November 2nd, 2006 at 01:23 PM.

  8. Join Date
    Sep 2006
    Posts
    59
    #8
    Thanks sa replies!

    How do i check kung OK pa ung water pump? More than 100k na din ung mileage nung car ko...

    Salamat!

  9. Join Date
    Oct 2002
    Posts
    22,658
    #9
    To check the water pump, you have to take it off the vehicle.

    AFAIK hindi naman ganun kamahal ang replacement (GMB) water pump so it makes sense na palitan mo na din para sulit ang labor. Usually kasabay ng timing belt ang palit ng water pump (around 80k kms).

    Called up the Benz workshop, fan clutch daw ang usual culprit nila sa mga ganitong cases involving MB100's. However getting to the fan of an MB100 involves removing almost the entire front end of the vehicle.

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  10. Join Date
    Sep 2006
    Posts
    59
    #10
    Thanks Otep!

    Gusto ko sana i - inspect kaso d ko alam kung asan ang water pump dun.. San ba usually located yun and how does it look like?

  11. Join Date
    Oct 2002
    Posts
    22,658
    #11
    Sundan mo lang ang drive belts mo. Belt driven siya so it's bound to have a shaft and pulley that is driven by the fanbelt.

    1998 Galant (V6 siguro) water pump:


    Halos magkakamukha naman ang mga iyan.

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  12. Join Date
    Aug 2005
    Posts
    2,063
    #12
    possible ang radiator cap..

    baka hindi na mka higop ng water sa reservior..

    wlang circulation kaya mainit..

    same prob sakin pero nawala na when i change my rad cap..

    kasi may circulation na at hihigop na sya ng tubig sa reservior..

    pina change ko na din ang water ng rad para wlang clog.

  13. Join Date
    Aug 2005
    Posts
    2,063
    #13
    Quote Originally Posted by johnart View Post
    Or have you checked your aircon condenser baka barado na. When was the last time you had the front washed ? With my car it was also overheating when I had it checked makapal na pala ang dumi sa harapan ng condenser kaya di maka circulate ang hangin
    bago lng ako ng pa clean up ng condenser.. ginamitan ng compressed air ..

    naging mas malamig ac ko hangang ngayun after the cleaning..

    stable na din ang temp ko..

    check ako water every 3 to 5 days..

  14. Join Date
    Sep 2006
    Posts
    59
    #14
    Thanks!

    i'l check later pag uwe ko.. Isang tanong pa po. Ung mga pang flush ng radiator, effective po ba ung mga yun?? balak ko kasing i flush ung radiator baka puro kalawang na rin.

    Salamat.

  15. Join Date
    Sep 2006
    Posts
    59
    #15
    Quote Originally Posted by finchy18 View Post
    possible ang radiator cap..

    baka hindi na mka higop ng water sa reservior..

    wlang circulation kaya mainit..

    same prob sakin pero nawala na when i change my rad cap..

    kasi may circulation na at hihigop na sya ng tubig sa reservior..

    pina change ko na din ang water ng rad para wlang clog.

    Bago ung radiator cap ko, kakapalit ko lang po.

  16. Join Date
    Aug 2005
    Posts
    2,063
    #16
    Quote Originally Posted by sprex View Post
    Bago ung radiator cap ko, kakapalit ko lang po.
    pag katapos mo bah pinalitan nag ka ganun na?

    if so..


    eh balik mo ang old rad cap mo..
    Last edited by finchy18; November 2nd, 2006 at 03:15 PM.

  17. Join Date
    Aug 2005
    Posts
    2,063
    #17
    Quote Originally Posted by sprex View Post
    Thanks!

    i'l check later pag uwe ko.. Isang tanong pa po. Ung mga pang flush ng radiator, effective po ba ung mga yun?? balak ko kasing i flush ung radiator baka puro kalawang na rin.

    Salamat.
    effective din.. matagal uminit ang temp kpag bagong flush.. na pansin ko na to many times..

  18. Join Date
    Sep 2006
    Posts
    59
    #18
    Quote Originally Posted by finchy18 View Post
    pag katapos mo bah pinalitan nag ka ganun na?

    if so..


    eh balik mo ang old rad cap mo..
    Sira na ung radiator car, ung rubber natatanggal na.. nung bagong palit cap, ok naman. after a week ganun na nangyari e.

  19. Join Date
    Aug 2005
    Posts
    2,063
    #19
    Quote Originally Posted by sprex View Post
    Sira na ung radiator car, ung rubber natatanggal na.. nung bagong palit cap, ok naman. after a week ganun na nangyari e.
    ahh ganun ba..

    same lng ba na rad cap ang pinalit mo?

    if not baka yan ang problem..

    dapat same pressure rating ...

    I suggest same rad cap para ganda ang circulation..

    napansin mo bah ang reservior mo? lagay kba ng lagay ng water?

  20. Join Date
    Sep 2006
    Posts
    59
    #20
    Quote Originally Posted by finchy18 View Post
    ahh ganun ba..

    same lng ba na rad cap ang pinalit mo?

    if not baka yan ang problem..

    dapat same pressure rating ...

    I suggest same rad cap para ganda ang circulation..

    napansin mo bah ang reservior mo? lagay kba ng lagay ng water?
    before ako nag palit ng cap, nag babawas sa reservoir at sa radiator. Nung napalitan na hindi na nag babawas ng water. Normal na ung water til now. parehas din ung cap, 0.9 un.

    Thanks!

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Overheat in Traffic