trouble shooting b16 heating up

General engine questions/issues that aren't specific to the other categories
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trouble shooting b16 heating up

By {ikon}EM1
- Wed Jan 20, 2010 10:08 pm #169836 at iddle the car heats up but when i drive it goes away. idk if its the thermastat or water pump. also i cant hear the fan turn on like i use to.
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By breez
- Wed Jan 20, 2010 11:49 pm #169864 Thermostat would be the quickest fix if thats the problem. Test yours in a pot of boiling water and go from there. :thumb:
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By {ikon}EM1
- Thu Jan 21, 2010 12:17 am #169871 so you mean pour boiling hot water down my radiator?
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By That One Dude
- Thu Jan 21, 2010 6:03 am #169958 He means take your T-stat out and put it in a pot of water on a stove with a thermometer in it. If your T-stat begins to open at 170degrees and is fully open by 190degrees, it's working properly.

IMO, that's more trouble than it's worth. Just replace your thermostat first, then if it still overheats, replace your radiator cap, and flush your cooling system. If it still overheats, replace your waterpump. Might as well replace the timing belt while you're in there. You'll regret it in the long run if you don't.
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By intheworks
- Thu Jan 21, 2010 12:52 pm #170012 so it gets warm then you drive and it goes cold but does it ever go back to being warm after driving awhile???? If it shows cold all the time (when your driving) then maybe the gauge is broken??????????
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By asianrob
- Thu Jan 21, 2010 12:57 pm #170013 sounds like water pump...
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By {ikon}EM1
- Thu Jan 21, 2010 8:33 pm #170094 i dont think the gauge is broken but i have off on friday so ill check it then... ill keep you guys posted thanks.
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By breez
- Thu Jan 21, 2010 9:39 pm #170117
intheworks wrote:so it gets warm then you drive and it goes cold but does it ever go back to being warm after driving awhile???? If it shows cold all the time (when your driving) then maybe the gauge is broken??????????


Do you warm your car up or do you just turn it on and it rises??
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By {ikon}EM1
- Thu Jan 21, 2010 10:20 pm #170135 when i turn the car on its fine... but when im sitting at a light it gets hot... then when i start driving it goes away.........
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By intheworks
- Thu Jan 21, 2010 10:36 pm #170143 ohhh ok mine did this and it was my coolant level being real low and air in the system.
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By teal_dx
- Fri Jan 22, 2010 1:14 am #170179
ohhh ok mine did this and it was my coolant level being real low and air in the system.


I had the same thing, a leaking head gasket was allowing air from the cylinder into the coolant passage.

have you checked the fan yet?
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By {ikon}EM1
- Fri Jan 22, 2010 2:20 am #170192 thanks buddy for moving it i saw it at last moment and didnt know how to move it... but i think it might be the fan cus i dont hear it turn on like i use to... it might be a fuse or relay but idk :?
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By intheworks
- Fri Jan 22, 2010 12:30 pm #170299 where the bottom radiator hose goes into the engine there should be a plug, that sensor is for the fan. i had to replace mine last summer
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By {ikon}EM1
- Fri Jan 22, 2010 11:52 pm #170442 i changed out the fuse and relay and it works fine now... but if anything happends ill let you know..
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