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Car running too cold?

Discussion in 'General Tech and Maintenance' started by lude68, Dec 6, 2003.

  1. lude68

    lude68 Senior Member

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    Ok, heres my predicament. I put a b18c1 motor in my car about 4 months ago along w/ a factory gsr radiator and filled it with water until the other day. It has been running just above the C and everything has worked fine....well the other day i drained about 70% of the water out and put in anitfreeze and know it doesnt even move? Since it doesnt warm up I cant get my heat to work decent, my vtec doesnt kick in(b/c of not enough oil pressure) and i can drive it for 30 min. down the highway at apx. 60-70 mph, stop at a red light and it still idles at 1500rpm like it hasnt even cooled up? What could be the problem?

    Thanks
     
  2. deth101

    deth101 Senior Member

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    therm stuck open???
     
  3. lude68

    lude68 Senior Member

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    not to my knowledge. Like i said it only started running this cold when i put in the anitfreeze. anything else it could be?
     
  4. deth101

    deth101 Senior Member

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    you could try putting cardboard over most of rad to see if it helps but I still say check the therm....it takes 10 min
     
  5. lude68

    lude68 Senior Member

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    ok well whats the easiest way?
     
  6. mwvnos

    mwvnos Senior Member

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    take off the back radiator hose, take out the 2(i think) bolts that hold the fitting in, then pry out the thermo and it should be closed, if not get a new one..... :spin:
     
  7. 92civicb18b1

    92civicb18b1 The Trisexual

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    that could be my problem, even though my shit idles around 8-900 the heater kinda sucks, i didnt really get to drive it long and use the heat
     
  8. cws13

    cws13 Senior Member

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    Thermostsat was my first guess. Your antifreeze should be 50/50. But after 30 min of hwy driving, your car should heat up even without a thermostat. Was this swap stock to stock, are you using stock gauges, checked your wiring...I'm assuming that your fans are not kicking on at any point.
     
  9. MXDesa

    MXDesa Senior Member

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    Make sure your head temperature sensor is connected as well. You could have knocked it loose. Its under the distributor and its a One wire sensor. Its real easy to disconnect it.
     
  10. Iquark

    Iquark Senior Member

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    I had this problem with my swap, and I finally got around to fixing it last weekend. I could go for ever before my car would heat up, and it was a pain in the ass because of my relatively short drives every morning (5mi). Finally I went to Shucks and bought a stock replacement, put it in and now warms up within 1.5-1.75 miles. One thing I noticed when I pulled the old thermostat out was that it was a 78 C thermo, and the stock replacement was an 82 C thermo... Maybe in Japan it's hotter than here so they put cooler Thermos in that don't work well in our cold?

    Anyways, just a reminder, you better drain your coolent before you change the thermo, because I forgot to do that, and it made a big mess. Just put a clean drain pan under the opening in the bottom of the radiator, where there's a little wing-nut like thingy, then let it all out. You can reuse it when your done if you do it right. Also, when you put it coolent back in, make sure you use the bleed valve to get all the air out.
     
  11. lude68

    lude68 Senior Member

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    aight guys...just put in the new thermo and that was the problem. thanx a lot!
     
  12. lude68

    lude68 Senior Member

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    OK..i put my new thermo in and it started to warm up. Well, i went into town and the damn thing runs hot! The top hose is getting warm like it is suppose to be but the bottom hose staying cold for some reason and the fan isnt turning on! WHATS THE DEAL?
     
  13. lude68

    lude68 Senior Member

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    anyone have an idea?
     
  14. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

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    could be air in the lines
     
  15. lude68

    lude68 Senior Member

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    i thought of that and let it run by itself to see if the thermo would open up, but i believe the thermo just isnt opening any so it isnt letting any water to the block?!? could that be it?
     
  16. simplyfast

    simplyfast Senior Member

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    take your radiator cap off and start the car. there is a slim chance you are leaking coolant into the cylinder. if water doesnt spout up/out of your radiator you dont have a leak.

    you now can have a thermo that isnt opening, or the temperature in which it opens isnt being reached.
     
  17. lude68

    lude68 Senior Member

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    ive done this and the water just sits there. my factory thermo says 78C and my new one states 82C. could that be the problem?
     
  18. Iquark

    Iquark Senior Member

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    Did you take the time to read my post, the change in temp doesn't matter at all. Mine runs just fine, and it's no colder here than anywhere else. Like was said eariler, you probably have air in the lines, that could be a problem. Also, when you put the thermo back on the block, did you reconnect the temperature sensor that was originally connected?
     
  19. lude68

    lude68 Senior Member

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    yes i read the post and yes i put the sensor back on! Like i stated i took off the cap, turned the car on, let it warm up(to see if it would open up to get some water to the block) and the bottom hose stayed cold while the top hose got hot! Fig. that when it opened up that water would flow in so i could put more into my radiator and that would solve the air problem?!?! Am i right or what?
     
  20. Iquark

    Iquark Senior Member

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    I know this is kind of stupid to ask, and I'm in no way dissing on you skills, but did you put the thermo in the correct way? Also, when you idled the car, how long did it take to get to standard temperature? You said previousily that it was running fine when it was just above the C, but really it should be right in the middle, so where is your definition of hot?
     
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