Overheating Issues

Discussion in 'Engine, Transmission and Drivetrain' started by naughtika, Feb 15, 2013.

Tags:
  1. naughtika

    naughtika OzVR4 Stalker Moderator Trader

    Joined:
    Jul 13, 2007
    Messages:
    9,657
    Likes Received:
    532
    Location:
    Brisbane, QLD
    First Name:
    Christian
    Drive:
    '96 Galant VR4, '17 MB A180, '25 Macan GTS
    Hey guys, yesterday I experience a little bit of overheating from my car.. car didnt stop or anything but i noticed the temp go up more than usual

    below is the scenario
    - a bit of stop and go traffic
    - was in the afternoon (4:30pm)
    - a bit of spirited drive prior to the stop and go

    setup of the car
    - using Billion 65*C low temp thermostat (for more than 1 year now)
    - recently changed fans to 1x 10" (push) and 1x 14" (pull type) - tested and pushes more air than the old one
    - using a 40mm thick Aluminum Radiator
    - coolant is new and has been air bleed properly
    - cooling system pressure tested prior to replacing the coolant (rad cap good) but there is a tiny bit of fluid leak from the waterpump (nothing to be overly concerned of, as long as I watch the fluid occassionally and yes its getting replaced soon)
    - overflow tank is active - coolant is dumped in there when hot and is sucked back into the radiator when cold

    now Im thinking of dumping the 65*C thermostat and replacing it with the usual 85*C ones

    what do you guys think is causing my little dilemma?
     
  2. Blue legnum

    Blue legnum Leaving Skid Marks

    Joined:
    Jan 31, 2012
    Messages:
    117
    Likes Received:
    1
    Location:
    Hillside, Victoria
    First Name:
    Joe
    Drive:
    2013 Suzuki Swift Sport , 65 Mustang 351w
    Hey Christian

    The spirited driving prior to the stop n go & the stop n go itself wouldn't of helped it cool down to normal temp!
    Was the a/c on as well?

    In normal circumstance you could continued driving & it would cool but the start n stop wouldn't allow enough air flow to cool it back down & or especially if a/c was on.. theres more of load on it.

    Also ditch the 65degC thermostat for the 85..
    The coolant is not staying long enough in the radiator to cool down & it wouldn't of helped with the above!
     
  3. tails

    tails 1 AYC Bar

    Joined:
    Apr 1, 2012
    Messages:
    1,193
    Likes Received:
    75
    Location:
    SA
    First Name:
    Taylor
    Drive:
    '00 Galant
    I think it would have to be very spirited driving to increase your engine temps to a point where it's noticeable on gauge.
     
  4. NuffNuff

    NuffNuff 1 AYC Bar Lifetime Member

    Joined:
    May 21, 2012
    Messages:
    943
    Likes Received:
    292
    Location:
    Victoria
    First Name:
    Damian
    Drive:
    GTI, GTI, FL Manual Legnum VR4
    did your overflow bottle overflow and spill out onto the motor when it overheated? mine did that when my radiator cap disintegrated, replacement stock cap fixed the problem.
     
  5. VOLK

    VOLK Stabbin' technique!

    Joined:
    Oct 17, 2009
    Messages:
    3,003
    Likes Received:
    382
    Location:
    QLD - BNE
    First Name:
    Joey T
    Drive:
    13 RA Lancer Hackzilla
    Posssibly water pump. Don't think it's thermostat related. Possibly fans too. If it's capable of keeping temp under control on the move but not when stationary then your cooling system is capable of shedding the heat but airflow isn't sufficient when stationary/slow.
     
  6. The Borg

    The Borg Leaving Skid Marks Lifetime Member

    Joined:
    Mar 4, 2012
    Messages:
    336
    Likes Received:
    24
    Location:
    Uki NSW
    First Name:
    Daniel
    Drive:
    2000 face lift Legnum VR4 manual
    Have you remembered to plug every thing in this time?:tongue_smilie:
     
  7. VOLK

    VOLK Stabbin' technique!

    Joined:
    Oct 17, 2009
    Messages:
    3,003
    Likes Received:
    382
    Location:
    QLD - BNE
    First Name:
    Joey T
    Drive:
    13 RA Lancer Hackzilla
    Also, fire up evoscan and check the actual water temps.
     
  8. naughtika

    naughtika OzVR4 Stalker Moderator Trader

    Joined:
    Jul 13, 2007
    Messages:
    9,657
    Likes Received:
    532
    Location:
    Brisbane, QLD
    First Name:
    Christian
    Drive:
    '96 Galant VR4, '17 MB A180, '25 Macan GTS
    stop and go, shouldn't matter as we have the thermo fans to assist with cooling the system down

    a/c was definitely on but the overheat was a bit strange where the temp had risen and stopped at a certain point.. then just stayed there..

    I've had the 65*C thermostat for more than a year and have had no issues until yesterday.. and i went for a 'spirited' driving (harder than usual) on a broad day light and low speed.. mostly doing corners and round abouts..


    that's what I thought at first, but then when i got home and had let the engine cool down for about 2-3 hours, the coolant in the radiator was full and the amount of coolant in the reservoir was the same as the day/night before..

    good thought on this, my dad said that its not the water pump as it was definitely moving the coolant,

    cant be the fan as it was moving air ALOT more than the factory setup..

    when it happened I was stationary, but I can definitely hear the fan running loud..

    1 thing i haven't mentioned was the position of the thermofan resistor pack.. its in direct position of where the airflow is..


    funny man :p but yes i did remember as otherwise my engine would've ended in catastrophe :p
     
    Last edited: Feb 15, 2013
  9. VOLK

    VOLK Stabbin' technique!

    Joined:
    Oct 17, 2009
    Messages:
    3,003
    Likes Received:
    382
    Location:
    QLD - BNE
    First Name:
    Joey T
    Drive:
    13 RA Lancer Hackzilla
    Ahh k so it wasn't a terminal overheat where the temp needle was reaching for the sky, just slightly above the norm then stopped hmmmmm....

    Check actual temps.
     
  10. naughtika

    naughtika OzVR4 Stalker Moderator Trader

    Joined:
    Jul 13, 2007
    Messages:
    9,657
    Likes Received:
    532
    Location:
    Brisbane, QLD
    First Name:
    Christian
    Drive:
    '96 Galant VR4, '17 MB A180, '25 Macan GTS
    that's next step..
     
  11. naughtika

    naughtika OzVR4 Stalker Moderator Trader

    Joined:
    Jul 13, 2007
    Messages:
    9,657
    Likes Received:
    532
    Location:
    Brisbane, QLD
    First Name:
    Christian
    Drive:
    '96 Galant VR4, '17 MB A180, '25 Macan GTS
    nah.. the temp had risen for about 15mm from the usual position.. stayed on that and it never did get any higher..

    i pulled over to a servo and parked the car properly just in case.. kept the engine running and so did the fan..

    turned the a/c on and off for a few minutes a a time.. temp stayed the same..
     
    Last edited: Feb 15, 2013
  12. TME_Steve

    TME_Steve 3 AYC Bars Trader

    Joined:
    Jan 12, 2010
    Messages:
    4,606
    Likes Received:
    950
    Location:
    NSW
    First Name:
    Steve
    Drive:
    2010 nt did pajero tow car / 2000 6spd gc8 wrx tarmac rally car / 2000 Manual Subaru Outback 2.5 just a car
    But you don't drive it hard.... so.... Your car is stuffed. Fans blowing the wrong way?
     
  13. Schneider

    Schneider Leaving Skid Marks

    Joined:
    Jul 9, 2009
    Messages:
    149
    Likes Received:
    23
    Location:
    NSW
    First Name:
    David
    Drive:
    PFL Legnum Vr4
    Curious, with the fans did you test the airflow with them mounted on the radiator?
    Could be a case of them providing higher airflow but not enough static pressure. Also agree with Steve, perhaps double check they are blowing the right way.
     
  14. Blue legnum

    Blue legnum Leaving Skid Marks

    Joined:
    Jan 31, 2012
    Messages:
    117
    Likes Received:
    1
    Location:
    Hillside, Victoria
    First Name:
    Joe
    Drive:
    2013 Suzuki Swift Sport , 65 Mustang 351w
    SH...T! 15mm above normal is quite abit when you descibe the type of driving, weather etc..

    Just a long shot... If the fans are flowing the right way n all, What gauge wire was used on the thermos?
    They might not be getting full current through the wire to run the fans full speed?
     
  15. TME_Steve

    TME_Steve 3 AYC Bars Trader

    Joined:
    Jan 12, 2010
    Messages:
    4,606
    Likes Received:
    950
    Location:
    NSW
    First Name:
    Steve
    Drive:
    2010 nt did pajero tow car / 2000 6spd gc8 wrx tarmac rally car / 2000 Manual Subaru Outback 2.5 just a car
    15mm would be around 140degree water temp from what I've seen
     
  16. naughtika

    naughtika OzVR4 Stalker Moderator Trader

    Joined:
    Jul 13, 2007
    Messages:
    9,657
    Likes Received:
    532
    Location:
    Brisbane, QLD
    First Name:
    Christian
    Drive:
    '96 Galant VR4, '17 MB A180, '25 Macan GTS
    stop being a hater, it is blowing the right way :p at this stage, i dont care if the engine blows as I have a spare one that'll be ready soon...

    i did test both fans individually while it was sitting on a step ladder and turned it on via direct connection to a battery.. and each fan seemed to push more air compared to the oe ones together


    what ever wire that came with it.. spliced it with the oe wiring

    I think, for a solution i will tap a thermoswitch on the bottom near the return hose.. wire it in with a few relays.. get my dad to do it..
     
    Last edited: Feb 15, 2013
  17. Kenneth

    Kenneth 1 AYC Bar

    Joined:
    Sep 9, 2008
    Messages:
    613
    Likes Received:
    130
    Location:
    New Zealand
    First Name:
    Kenneth
    Drive:
    1999 Galant VR-4
    Carsten has the same problem with his, though he is running both fans in push + full alloy radiator.

    One possibility is that at low engine speed with the bigger radiator there also isn't enough turbulence (water speed) through the core to get optimal heat transfer, also contributing to a slightly high temperature.

    Carsten has been running his like that for ages, I wouldn't be overly concerned. If you are, get a electric booster pump to improve your idle water flow.
     
  18. Rabit

    Rabit Leaving Skid Marks

    Joined:
    Mar 31, 2012
    Messages:
    596
    Likes Received:
    74
    Location:
    Qld
    First Name:
    Robert
    Drive:
    2000 Legnum Mint with 44589ks when I got it. Now with black leather seats. After 3 years of fun some terminal engine bay wiring issues raised their ugly heads and it died. I Now drive a 2002 Legnum and have retired the 2000 to spare parts duty.
    Hi Christian, Have you checked that both fans are moving the air in the correct direction, that is from the front to the rear. They are DC motors and its easy to plug them in with the polarity incorrect. With one in front and one on the back of the radiator they need to be connected with opposite polarity so that one pushes and one pulls the air through.
     
  19. TME_Steve

    TME_Steve 3 AYC Bars Trader

    Joined:
    Jan 12, 2010
    Messages:
    4,606
    Likes Received:
    950
    Location:
    NSW
    First Name:
    Steve
    Drive:
    2010 nt did pajero tow car / 2000 6spd gc8 wrx tarmac rally car / 2000 Manual Subaru Outback 2.5 just a car
    I have a40mm radiator and it works fine.... These fans, do they floe more but against less static pressure perhaps? Do they move lots of air though the radiator out just out in the open? Also, what are the shrouds like?
     
  20. brackenridgevr4

    brackenridgevr4 Hesitantly Boosting

    Joined:
    Nov 26, 2011
    Messages:
    83
    Likes Received:
    3
    Location:
    qld
    First Name:
    luke
    Drive:
    pfl vr4 legnum evo8
    U need to have both fans pressurising your radiator or she won't work 2 blowing one way or 2 pulling either or
     

Share This Page