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stays cold while driving, temp normal at idle Help

Discussion in 'Engine Tech / Drivetrain' started by HondaCRX881, Aug 31, 2010.



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  1. HondaCRX881

    HondaCRX881 New Member 5+ Year Member 10+ Year Member

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    Minnesota
    So interesting question i have that i have never run into before. Just changed my radiator out but flushed the system before i changed it. so i put the new radiator and bled the system of air. let the engine get to operating temp and the fan kicks on. no erratic idle or anything. Heres the situation though. It will warm up to normal operating temp when im going slow through town or at idle but as soon as i hit freeway speeds or even about 55mph or so consistently, the temp gauge drops to below the meter but above the "C" in my crx. there is of course no signs of overheating as far as i can tell but even in my last rex when i swapped in a huge overkill fluidyne radiator it still stayed at a constant operating temp even while on the freeway. has anyone ran into this before or know what it might be? my first thought is thermostat isssue but i might be way off. any help?
     
  2. knightxrider1

    knightxrider1 New Member Registered VIP 5+ Year Member

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    mine does that too. i think its because its gettin airflow from you going highway speeds. my temp gauge will drop sometimes too. only on colder days tho.
     
  3. sohclubkid

    sohclubkid Sick 6/6 Registered VIP Registered OG 5+ Year Member

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    i bet you have a gutted thermostat and you dont even know it.
     
  4. HondaCRX881

    HondaCRX881 New Member 5+ Year Member 10+ Year Member

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    you think maybe the thermostat is stuck open maybe?
     
  5. chrishil

    chrishil New Member

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    Sep 1, 2010
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    Location:
    USA
    Coolant

    Your car’s thermostat is the first thing you have to look out. You may also check out if there’s a leak in the cooling system.
     
  6. sohclubkid

    sohclubkid Sick 6/6 Registered VIP Registered OG 5+ Year Member

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    this

    or possibly stuck open, but it should still get warm with it stuck open... so i say its gutted.
     
  7. JohnS.

    JohnS. BANGARANG Staff Member Registered VIP Registered OG 5+ Year Member

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    Most likely a bad thermostat. They're cheap and incredibly easy to fix. I changed mine last summer and my car warms up SO much faster now.
     


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