1. Join the Community!

    DSMtuners is a massive archive of DSM information - but more importantly, it's a COMMUNITY! Join in and participate with other DSMers, and invite all of your DSM friends to make this place their home. Chat with others, create a build thread, post questions and answers. Get involved! Logging in will also remove many of the advertisements, along with this notice. ;)

Turning my heat on, stops car from overheating?!?!

Posted by Jeff D Desantis, Apr 8, 2019

Please Support STM Tuned
Please Support Southbay Fuel Injectors
  1. Jeff D Desantis

    Jeff D Desantis Proven Member

    49
    4
    Joined Nov 5, 2018
    Rochester, New York
    Been having times where my car over heats when I turn off the heat in my car. I'm assuming its head gasket issues? Car runs perfect with heat is turned on in car, when the heat is turned off car will overheat and bubble the coolant and cause pressure.
     

    211  4

    1998 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
    Loading...
  2. ATF 2GTalon

    ATF 2GTalon Proven Member

    70
    11
    Joined Oct 28, 2002
    NYC, New York
    This is an old school trick to prevent overheating way back in the olden days. The heater core is part of the engine's coolant circuit and acts as a second radiator. So in an emergency if you see you are starting to overheat, turn the temp controls to full heat and turn the fans on full blast. Then just slow down and find some place safe to pull over and let the car cool down.

    And as you mentioned, you are overheating because of the blown head gasket. Get that taken care of before you warp the head even worse than it probably already is.
     

    Street Build 610  1

    1995 Eagle Talon TSi
    13.7 @ 105 · 2G DSM
    Loading...
  3. Jeff D Desantis

    Jeff D Desantis Proven Member

    49
    4
    Joined Nov 5, 2018
    Rochester, New York
    Ahh thanks for the info! I'd love to have it looked at and repaired but my patience is running low for this beauty! I'm putting her up for sale, and if I can't get any decent offers i'll just have her repaired down the road. These cars are cursed! LOL jk
     

    211  4

    1998 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
    Loading...
  4. ATF 2GTalon

    ATF 2GTalon Proven Member

    70
    11
    Joined Oct 28, 2002
    NYC, New York
    I posted in your other thread you should check STM Tuned. And IIRC you recently did the paint job on your car and your car pics looks like it's in good condition. I hate seeing new people give up on DSMs. Besides the blown head gasket, what other problems are you having?
     

    Street Build 610  1

    1995 Eagle Talon TSi
    13.7 @ 105 · 2G DSM
    Loading...
  5. Jeff D Desantis

    Jeff D Desantis Proven Member

    49
    4
    Joined Nov 5, 2018
    Rochester, New York
    Yes the car is MINT! I had the body, interior done, looks everything! I don't want to get rid of the car. I'm too scared getting ripped off at a mechanic to take it anywhere near one around here! Only issue is the head gasket, car runs drives amazing.

    I'll pay for a DSM Tuner to come out and fix it LOL. How much? I'll pay travel expenses plus time fixing + parts obviously.
     
    Last edited: Apr 8, 2019

    211  4

    1998 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
    Loading...
  6. Bo0sTeD 4G63

    Bo0sTeD 4G63 Supporting Member

    300
    50
    Joined Aug 31, 2008
    Miami, Florida
    He never said he had a blown head gasket he said he was assuming he has a bad head gasket.

    Before you jump to conclusions I would first make sure you radiator fan is working properly and it turns on when your car starts to heat up. You mentioned when your " Car runs perfect with heat is turned on in the car ". Check the fan and see if its working properly and then report your findings.
     

    Street Build 943  1

    1997 Mitsubishi Eclipse GSX
    awd · automatic · 2G DSM
    Loading...
  7. Jeff D Desantis

    Jeff D Desantis Proven Member

    49
    4
    Joined Nov 5, 2018
    Rochester, New York
    Hi, the fan is actually broke in the car. Never worked when I purchased.
     

    211  4

    1998 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
    Loading...
    d1prospect likes this.
  8. d1prospect

    d1prospect Proven Member

    208
    25
    Joined Mar 14, 2004
    Glen Bunie, Maryland
    Start with getting fans situated.
     

    Drag Race Build 3K  15

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
    Loading...
  9. Kai Hefner

    Kai Hefner Proven Member

    133
    34
    Joined Jun 21, 2018
    Calgary, AB, Canada
    Can you hear bubbling at the front of the car when you park it?

    Had this issue on my car when I was just starting out, your coolant isn't properly bled. Try a coolant flush and follow proper bleed procedure, which you can do on your own in 15 minutes.

    Could be a number of other things as well but this is my guess.

    EDIT: Is there white smoke coming out of your tailpipe? Are you losing coolant over time?
     

    Street Build 230  1

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    Road Race Build 444  1

    1998 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
  10. Jeff D Desantis

    Jeff D Desantis Proven Member

    49
    4
    Joined Nov 5, 2018
    Rochester, New York
    Yes so the coolant bubbled and got super hot. Causing steam/almost smoke coming from the engine at one point. When the car over heated white smoke came out. This happened when I turned off the heater. Car instantly over heated within 5 minutes. But with heat on I can drive it for hours with no issues. I'm so confused.
     

    211  4

    1998 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
    Loading...
  11. Kai Hefner

    Kai Hefner Proven Member

    133
    34
    Joined Jun 21, 2018
    Calgary, AB, Canada
    That's not good.

    Fans are definitely worth checking/fixing.

    Start with a flush and a proper bleed, see where it gets you. If you can afford for someone to travel over to fix it, you can buy some coolant and risk it being wasted.
    An improper coolant bleed can trick the thermostat and not let it open, you might be running into this issue.

    When you drive for hours, do you notice if you are losing a bit of coolant?
     

    Street Build 230  1

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    Road Race Build 444  1

    1998 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
  12. Jeff D Desantis

    Jeff D Desantis Proven Member

    49
    4
    Joined Nov 5, 2018
    Rochester, New York
    I think the coolant got pretty low over a month of driving, but it never leaks? The car actually never leaks, maybe a drop of oil every now and then but its in good shape, just have this 1 issue.
     

    211  4

    1998 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
    Loading...
  13. Kai Hefner

    Kai Hefner Proven Member

    133
    34
    Joined Jun 21, 2018
    Calgary, AB, Canada
    Yeah so losing coolant with no leaks is a pretty sure sign of a head gasket.

    Have you ever added coolant into your system and not done a bleeding procedure?
     

    Street Build 230  1

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    Road Race Build 444  1

    1998 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
  14. Jeff D Desantis

    Jeff D Desantis Proven Member

    49
    4
    Joined Nov 5, 2018
    Rochester, New York
    I've done that. When the car over heated the first time I put coolant in because there was none left. The guy who sold it to me probably knew of this issue and kind of took off after selling it to me, which is fine or whatever I know it needed TLC and had potential. I am just getting pretty tired with the car for right now LOL.
     

    211  4

    1998 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
    Loading...
  15. Kai Hefner

    Kai Hefner Proven Member

    133
    34
    Joined Jun 21, 2018
    Calgary, AB, Canada
    Yeah so it probably has a small headgasket leak. The major bubbling and whatever stems from you not bleeding the coolant system. The thermostat is reading incorrectly and, in your case, is just staying closed most/all of the time.
    Bleed it correctly and you should be fine for a bit until you get that HG fixed.
     

    Street Build 230  1

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    Road Race Build 444  1

    1998 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
  16. Jeff D Desantis

    Jeff D Desantis Proven Member

    49
    4
    Joined Nov 5, 2018
    Rochester, New York
    Thank you, sounds good. So bleed the coolant system and get a radiator fan that works to start. I'll probably have the mechanic do that in one shot. Is there a link for an affordable one? Mine is not side mounted its behind the intercooler.
     

    211  4

    1998 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
    Loading...
  17. Kai Hefner

    Kai Hefner Proven Member

    133
    34
    Joined Jun 21, 2018
    Calgary, AB, Canada
    FYI all radiators are front-mounted. It's intercoolers that come stock side-mounted. Good luck getting it figured out man!
     

    Street Build 230  1

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    Road Race Build 444  1

    1998 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
  18. Jeff D Desantis

    Jeff D Desantis Proven Member

    49
    4
    Joined Nov 5, 2018
    Rochester, New York
    Oh geez haha, thank you. Is it possible to lose horsepower from this issue? I feel like the car is slower than it should be right now.
     

    211  4

    1998 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
    Loading...
  19. Kai Hefner

    Kai Hefner Proven Member

    133
    34
    Joined Jun 21, 2018
    Calgary, AB, Canada
    Kind of, but not major. Technically you're getting heat soak but so is everyone else who is driving their cars more than 5 minutes at a time. If you're overheating a bit, you're just getting a bit more than everyone else, but the horsepower losses are likely incredibly minimal in your case.

    I wouldn't beat on it too hard before getting the stuff fixed anyways. Running a car with problems will only lead to more problems.
     

    Street Build 230  1

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    Road Race Build 444  1

    1998 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
  20. Jeff D Desantis

    Jeff D Desantis Proven Member

    49
    4
    Joined Nov 5, 2018
    Rochester, New York
    So Basically the current list is:
    1) Bleed Coolant (is this what they call a coolant flush?
    2) New Radiator Fan (can you guys provide any links to ordering a decent one for the money)
    3) Head Gasket Issue (geez where do I begin with this, this is where I can get destroyed at the shop by not being savvy with automobiles)
     

    211  4

    1998 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
    Loading...
  21. ThunderChild

    ThunderChild Supporting VIP

    2,522
    685
    Joined Jan 5, 2012
    Rathdrum, Idaho
    1. Technically it's called purging or "burping" the coolant system. You jack the front of the car up some, fill the coolant to the top, run the car (with heat on high) and as it's running you squeeze the rad hoses repeatedly, which "burps" the air out. As the car warms up, the t-stat opens, as well as the FIAV, which helps release any trapped air pockets and ensures the system is completely topped up. One of THESE will help to keep from spilling coolant everywhere during the process.

    2. I would recommend Performance Part Out or Miller Import Please for a good priced, stock unit. Spal or Fal fans are a good, yet spendy aftermarket option. Make sure you can get a shroud of some kind to direct the air properly, as this aides greatly in cooling efficiency. If you have to mount the fans between the rad and intercooler, just make sure you have plenty of fans of decent quality. FWIW, stock fans work excellently as long as you can fit them.

    3. You will want to be 100% sure it's a HG before diving in, so do a leak down test to see if you get bubbles in the cooling system when the combustion chamber is pressurized. You can also do a gas test (true name escapes me rn) where you test for exhaust/emissions gas in the cooling system with a 5 gas analyzer. Most shops can do this, but it's reserved for the hard to find issues generally.
    A leak down should give you a pretty good idea if it's truly leaking.

    Is the car blowing white smoke from the tail pipe when running? What do the spark plugs look like after running for a few min? Usually if you have compression going into the cooling system, you will end up with coolant pushing back into the CC after you shut off the car. This will then burn when you start it again and will cause white smoke, as well as discolored spark plugs, depending on how long you run it.

    You could always just shotgun the HG and do a timing job at the same time to cover bases, but that can get expensive, though if you're paying a shop for the other procedures it might be the best route to go anyway.
     

    Street Build 165  3

    1990 Plymouth Laser N/T
    fwd · manual · 1G DSM

    257  8

    1987 Toyota Pickup/Hilux
    awd · manual · Misc Vehicles

    Street Build 793  7

    1997 Mitsubishi Eclipse Spyder GST
    fwd · manual · 2G DSM

    Street Build 1K  1

    1992 Eagle Talon TSi AWD
    manual · 1G DSM

    Street Build 2K  10

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
    Loading...
    GReddyTalon likes this.
  22. Jeff D Desantis

    Jeff D Desantis Proven Member

    49
    4
    Joined Nov 5, 2018
    Rochester, New York
    Thank you SO SO MUCH for this info, I'll save it and give to shop when I go. This seems very expensive like you say. Ball Park figures?
     

    211  4

    1998 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
    Loading...
  23. ThunderChild

    ThunderChild Supporting VIP

    2,522
    685
    Joined Jan 5, 2012
    Rathdrum, Idaho
    Waaay to hard to guess. Depending on parts used and shop rates. If you get your own quality parts you might save money and have better pieces than some shops may offer you.
    Call around and see what different ones may offer, ask questions, see who seems the most knowledgeable, honest and fair priced.
     

    Street Build 165  3

    1990 Plymouth Laser N/T
    fwd · manual · 1G DSM

    257  8

    1987 Toyota Pickup/Hilux
    awd · manual · Misc Vehicles

    Street Build 793  7

    1997 Mitsubishi Eclipse Spyder GST
    fwd · manual · 2G DSM

    Street Build 1K  1

    1992 Eagle Talon TSi AWD
    manual · 1G DSM

    Street Build 2K  10

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
    Loading...
  24. Kai Hefner

    Kai Hefner Proven Member

    133
    34
    Joined Jun 21, 2018
    Calgary, AB, Canada
    I have a weird feeling this car will slowly turn you into a mechanic ROFL
    Inspect the wiring of the fans. Wouldn't want to spend $200 on a new fan if the only issue was that one of your wires was messed up.
     

    Street Build 230  1

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    Road Race Build 444  1

    1998 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
  25. Jeff D Desantis

    Jeff D Desantis Proven Member

    49
    4
    Joined Nov 5, 2018
    Rochester, New York

    211  4

    1998 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
    Loading...

Share This Page

Support Vendors who Support the DSM Community
Archer Fabrication ECM Tuning ExtremePSI Feal Suspension Fuel Injector Clinic Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications OHM Racing RockAuto SouthBay Fuel Injectors STM Tuned Track Decals Track Sculptures VR Speed Factory WheelWell.com White Shed Speed