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Car Overheating

Posted by Andrew Dussap, Aug 24, 2020

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  1. Andrew Dussap

    Andrew Dussap Probationary Member

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    Jacksonville, North Carolina
    Hey guys, bought a 2g a couple weeks back and she started to overheat, now I have made sure the fan are properly working, she shows coolant in the radiator plus I changed the thermostat today and I had her compression tested, she’s good on that. I also had her recently oil changed and am constantly checking the level of the oil and she’s good. As I drive the car, she starts to cool down and I usually notice it a lot better when I have the heat on, but when I’m at traffic lights the temp gauge rises and I really don’t know what it is, I need your help to get her properly working, any ideas?? I’m thinking water pump
     
  2. motomattx

    motomattx Proven Member

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    wampum, Pennsylvania
    Bad radiator cap, bad radiator.
     

    Drag Race Build 4K  10  24

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  3. Andrew Dussap

    Andrew Dussap Probationary Member

    15
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    Joined Aug 24, 2020
    Jacksonville, North Carolina
    Do you think the radiator could be clogged ?
     
  4. motomattx

    motomattx Proven Member

    3,140
    1,112
    Joined Dec 9, 2010
    wampum, Pennsylvania
    Could be, radiator cap first though.
     

    Drag Race Build 4K  10  24

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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    Andrew Dussap likes this.
  5. Mello

    Mello Proven Member

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    Albuquerque, New Mexico
    Not much history or profile of your car. Before you go through the trouble of changing the water pump get a pressure tester & look for pin hole leaks, & try a new radiator cap. BTW how old is your radiator cap?
     
  6. TK's9d2TSi

    TK's9d2TSi Supporting Member

    4,036
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    Cincinnati, Ohio
    What fans are on it? When you have the heat on, you’re pulling heat from the coolant system Via the heater core. That’s why it’s not overheating when you have the heat on.
     

    522  3

    2000 Jeep Cherokee Sport - Classic
    awd · automatic · Misc Vehicles

    552  4

    93 Civic 4 Door -sold-
    fwd · manual · Misc Vehicles

    Street Build 3K  5

    1992 Eagle Talon TSi AWD
    12.2 @ 120 · 1G DSM
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  7. Andrew Dussap

    Andrew Dussap Probationary Member

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    Joined Aug 24, 2020
    Jacksonville, North Carolina
    Honestly man, I’m not sure on how old it is, I’m going to replace it tomorrow and look for leaks even know I didn’t find any on the top.
     
  8. Dericsh

    Dericsh Supporting Member

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    Pearl River, Louisiana
    Are you running factory fans?
     

    Street Build 387  2

    1991 Mitsubishi Eclipse GST
    fwd · manual · 1G DSM
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  9. Andrew Dussap

    Andrew Dussap Probationary Member

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    1
    Joined Aug 24, 2020
    Jacksonville, North Carolina
    I’m running after market fans
     
  10. TK's9d2TSi

    TK's9d2TSi Supporting Member

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    Cincinnati, Ohio
    Cheap fans are junk
     

    522  3

    2000 Jeep Cherokee Sport - Classic
    awd · automatic · Misc Vehicles

    552  4

    93 Civic 4 Door -sold-
    fwd · manual · Misc Vehicles

    Street Build 3K  5

    1992 Eagle Talon TSi AWD
    12.2 @ 120 · 1G DSM
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  11. Andrew Dussap

    Andrew Dussap Probationary Member

    15
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    Joined Aug 24, 2020
    Jacksonville, North Carolina
    Yeah man, I forgot which ones I have but they aren’t cheap, it could be a clogged radiator, but it’s an after market mishimoto radiator, don’t know how long it’s been on the car
     
  12. Dericsh

    Dericsh Supporting Member

    549
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    Joined Nov 25, 2002
    Pearl River, Louisiana
    Do they have proper shrouds?
     

    Street Build 387  2

    1991 Mitsubishi Eclipse GST
    fwd · manual · 1G DSM
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  13. rabenne

    rabenne Proven Member

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    Racine, Wisconsin
    What temperature (from your datalog or gauge) is the car reaching?
     

    814  10

    1996 Mitsubishi Eclipse GSX
    awd · automatic · 2G DSM

    Street Build 9K  24

    1995 Eagle Talon TSi
    awd · manual · 2G DSM

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  14. spyderdrifter

    spyderdrifter Freelancer

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    I think one of the more important questions here, would be did you properly burp the cooling system after replacing your thermostat? A quick way to check your water pump, which could definitely be a problem here, is while the car is off, and not steaming hot, remove your radiator cap. Then start your car and let it idle. Don't rev it. Then observe the rad cap location to see if you can see coolant moving through the t-stat housing. If not, your water pump is probably failing. In either case, make sure you properly burp the system to get all the air bubbles out. That will cause overheat symptoms.
     

    2K  2

    1996 Eagle Talon TSi AWD
    awd · manual · 2G DSM

    2K  3

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

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    1999 Mitsubishi Eclipse N/T
    automatic · 2G DSM
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  15. Andrew Dussap

    Andrew Dussap Probationary Member

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    Joined Aug 24, 2020
    Jacksonville, North Carolina
    Yes the mishimoto radiator has proper shrouds, today I’m going to get the radiator flushed and tested to make sure it’s good.

    Yesterday after changing out the thermostat, I added some new antifreeze and left the radiator cap open while I was letting the car sit at idle for around 20 mins and watching to make sure all or atleast most bubbles are out of the radiator, I’m not sure how old the antifreeze is or if the radiator just needs to be flushed

    While I’m driving the car, I keep the hot air on to keep the temperature from rising but when I’m at idle it starts to increase and cools down while in motion, I’m going to replace the radiator cap today and get a radiator flush
     
    Last edited by a moderator: Aug 25, 2020
  16. rabenne

    rabenne Proven Member

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    Dude, do you have a gauge or datalogger access? Are you just guessing that its overheating?? Stock gauge is meaningless - just FYI.

    Simple question. WHAT TEMP IS IT GETTING TO?
     

    814  10

    1996 Mitsubishi Eclipse GSX
    awd · automatic · 2G DSM

    Street Build 9K  24

    1995 Eagle Talon TSi
    awd · manual · 2G DSM

    390  7

    2008 Lancer Evolution MR
    awd · automatic · Lancer Evolution
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  17. lasthope05

    lasthope05 Proven Member

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    Philadelphia, Pennsylvania
    Overheating at idle leads me to believe the fans arent working or atleast one isnt(if A/C is ON). The car doesnt rely on the fans when at speed. However you said they are working so it leads me to believe you have cheap shitty fans.
     
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  18. rabenne

    rabenne Proven Member

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    Racine, Wisconsin
    Or maybe its not actually overheating since we dont know what temp its reaching.

    Maybe cover the basics? Like what temp you are seeing...
     

    814  10

    1996 Mitsubishi Eclipse GSX
    awd · automatic · 2G DSM

    Street Build 9K  24

    1995 Eagle Talon TSi
    awd · manual · 2G DSM

    390  7

    2008 Lancer Evolution MR
    awd · automatic · Lancer Evolution
    Loading...
  19. Andrew Dussap

    Andrew Dussap Probationary Member

    15
    1
    Joined Aug 24, 2020
    Jacksonville, North Carolina
    When I turn the car on in the morning, I drive and as I drive the temp increases and it still drives normally and as it reaches hot, it starts to misfire and lag. The temp instrument on the instrument cluster shows its at H(hot)

    I have a simple cluster in the instrument cluster telling me whether the car is either cold, in the middle or hot. In your car it may be meaniningless but it actually works in mine. The engine gets to hot and starts to backfire and stutter when it overheats. I got the block tested and it was fine, got it compression tested and it’s fine, changed the thermostat, cleaned the fuel injectors. The only thing I haven’t done is a radiator flush.
     
    Last edited by a moderator: Aug 25, 2020
  20. Mello

    Mello Proven Member

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    Albuquerque, New Mexico
    I hope you're only doing minimal driving for troubleshooting purpose & not trying to commute until you get this figured out. Have you check the coolant for oil & the oil for coolant yet? If you're getting into the red on the temperature gauge you're going to have more problem besides just running hot.
     
  21. Andrew Dussap

    Andrew Dussap Probationary Member

    15
    1
    Joined Aug 24, 2020
    Jacksonville, North Carolina
    I drive less than 2 miles and the engine doesn’t heat up enough to get it to overheat. But about it overheating, I just don’t know what is causing it. I have checked the coolant and it seems good to me, checked the oil and that was good too
     
  22. rabenne

    rabenne Proven Member

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    Racine, Wisconsin
    Still kinda sounds like you don't know what temp you are running. That's where I would start... You really are just grasping at straws with no datalogging or gauges.

    Does the level go down? Does the level in overflow stay the same?

    The cap has been suggested several times. Did you replace the cap? It is cheap insurance on the system and can cause all kinds of strange issues. It might also be worth renting a cooling system pressure tester so you can ensure there aren't any leaks you might be missing.
     

    814  10

    1996 Mitsubishi Eclipse GSX
    awd · automatic · 2G DSM

    Street Build 9K  24

    1995 Eagle Talon TSi
    awd · manual · 2G DSM

    390  7

    2008 Lancer Evolution MR
    awd · automatic · Lancer Evolution
    Loading...
    Andrew Dussap likes this.
  23. Andrew Dussap

    Andrew Dussap Probationary Member

    15
    1
    Joined Aug 24, 2020
    Jacksonville, North Carolina
    I bought the radiator cap and will put the new one on today after work, I do have a guage that shows water temp, but I don’t think it was wired up right, if I cold start the engine it’s always on 140. And never ever changes so I rely on the instrument cluster temp gauge ands it’s accurate
     
    Last edited by a moderator: Aug 25, 2020
    rabenne likes this.
  24. spyderdrifter

    spyderdrifter Freelancer

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    Fountain, Colorado
    Just to add this in here, but shouldn't need to, not everyone has access to data loggers or such items. I am lucky enough to have a code reader that also provides live data including the ECT. It's handy since i unfortunately don't have Link. Before I got it, I had nothing to gauge my actual temp or any other data. I too had to use the oem, inaccurate gauges. It sucks, but sometimes that's all that is available. Please everyone, be more respectful of our fellow DSM family and actually help to save these cars from ending up in a junk yard.
     

    2K  2

    1996 Eagle Talon TSi AWD
    awd · manual · 2G DSM

    2K  3

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    2K  5

    1999 Mitsubishi Eclipse N/T
    automatic · 2G DSM
    Loading...
    Andrew Dussap likes this.
  25. rabenne

    rabenne Proven Member

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    Racine, Wisconsin
    For your gauge, I think we can help you get that working, and I have to stress that its worth doing if you have suspected overheating issues. They are super simple to wire up, so if you review the installation instructions, I am confident you should be able to get it working. Post any problems you run into and someone here can surely steer you through it.
     
    Last edited by a moderator: Aug 25, 2020

    814  10

    1996 Mitsubishi Eclipse GSX
    awd · automatic · 2G DSM

    Street Build 9K  24

    1995 Eagle Talon TSi
    awd · manual · 2G DSM

    390  7

    2008 Lancer Evolution MR
    awd · automatic · Lancer Evolution
    Loading...
    Andrew Dussap likes this.

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