getting hot rex?
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This is a discussion on getting hot rex? within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I have a 2001 wrx with mods inc forged pistons running at 270bhp. The temp gauge keeps shooting to the ...

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    getting hot rex?

    I have a 2001 wrx with mods inc forged pistons running at 270bhp. The temp gauge keeps shooting to the red when in slow traffic or stand still but returns to normal as soon as doing about 40mph.Also the heater wont blow hot air until you get a bit heavy with the loud pedal.Dont know if they are related but good do with some ideas.

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    Registered User wait3's Avatar
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    Check your coolant level... And are your fans kicking on?
    Last edited by wait3; 12-05-2008 at 10:24 AM. Reason: thought of something else
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    He simply abides. SD_GR's Avatar
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    Assuming there is no juice coming out (make sure there are no leaks obviously):

    1. As mentioned, do the fans kick in?
    2. Is there circulation of coolant once the thermostat opens (in other words, (a) does the thermostat open and (b) does coolant circulate if/when it does)?
    3. Have you tried burping the system to make sure there are no air pockets?
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    Fan does kick in and seems to stay on for a while or keep kicking in frequently . Levels seem fine . This has happened before but went away for a few months but has returned .How do i check if coolant is being allowed to circulate and how do i burp it ? Thanks for help so far .

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    See here:
    Car Overheating.
    and/or
    Cooling system
    and be careful since you are dealing with hot liquids, a hot motor, pressure, and fans kicking on/off at any given time.

    You will know you have circulation when you see the coolant flow and/or the level drop a bit once the car reaches full warm (this is with the cap off; read the threads above to see how to burp and then look for circulation, and only do all this by starting with a stone cold car -- again, be safe). Oh, and never let the car overheat. If you can't sort it, and can't get help from anyone local (Try scoobynet.co.uk and see if there's someone close by that could have a look in exchange for a pint etc. if need be) then take it to a specialist garage.

    Hope this helps.
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    Thanks , i have checked for air locks and if there is circulation
    but there doesnt seem to be circulation.I have felt the flow and return pipes going into the bulk head and one is hot and the other is cold even when temp is hot .Also the interior fan does get hot eventually ,is this also pointing towards a stuck closed thermostat.Where is the thermostat

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    He simply abides. SD_GR's Avatar
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    If you are certain there is no circulation then yes, it's pointing toward a stuck (closed) thermostat. The thermostat is in a small housing located where the bottom radiator hose meets the motor.
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    The world breaks everyone and afterward many are strong in the broken places. Ernest Hemingway
    I lied. I cheated. I bribed men to cover the crimes of other men. I am an accessory to murder. But the most damning thing of all... I think I can live with it. And if I had to do it all over again - I would. Benjamin Sisko
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    Registered User 03CrazyTaxi's Avatar
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    It's most likely the thermostat. While you're in there, it might be a good idea to change the water pump.
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    Cheers for ideas and help , i am working on car next weekend so i will post my findings then . Thanks again.

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    Registered User STI_KLR's Avatar
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    Did the needle actually hit the "red" or the "H" or did it just get to that line before it?
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    The needle actually goes into the red sometimes , depends how long i am in traffic or travelling slow.

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    Registered User STI_KLR's Avatar
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    Quote Originally Posted by llwrx View Post
    The needle actually goes into the red sometimes , depends how long i am in traffic or travelling slow.
    I would be extremely worried about your head gaskets. Make sure you keep an eye out for coolant and oil as well as their distinct scents.
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    rex is now feeling much cooler.

    Thanks to every one for advice and i have now sorted the over heating issue. As thought it was the thermostat and a new one was fitted today along with a new fill up of juice . Thanks again and i hope this thread can help some one else with similar trouble.

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    I'm afraid my thermostat is stuck too. The funny thing is i don't know how long its been stuck. Recently i did the throttle body bypass mod and lost a little coolant. Apparently it was enough to cause an air bubble in my system which made the engine temp creep up. Burped the system and all is well with the gauge. I don't think my cooling systems problems are solved because even after 20 mins of spirited driving this evening my lower radiator hose is at ambient temp (first time i've ever felt it). I have an 04 WRX with 93k miles. My heater has always blown VERY hot since i bought it. I think i'm going to go with the mishimoto 60C thermostat. I pretty much just made this post so people could search it but any feedback is appreciated.

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    Good news, everyone! xxxxxxxAnub1s's Avatar
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    Quote Originally Posted by 03CrazyTaxi View Post
    It's most likely the thermostat. While you're in there, it might be a good idea to change the water pump.
    That's REALLY not a "while you're in there" kind of thing on a Subaru.

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