I have a weird over heating situation
#1
Honda-Tech Member
Thread Starter
I have a weird over heating situation
Was high reving first gear on a main road then stopped at some lights, took off a again and noticed my water temp was slightly above mid way point, so i ran my heater on level 1 and it immedietely went down to normal operating temperature.
Then when coming home i decided to just sit in the middle of the road and there we go, the temp begins to rise again, start driving and the temp goes back down to normal level.
Got home and let the car idle in my drive way and yep it begins to rise again but stays at 3/4 and just seems happy to sit there. Pop the hood and the radiator fan is working it's **** off (sounds louder than usual), then the fan turns off (temp still at 3/4) and it immeditely drops to normal operating temperature.
Is it possible the fan isnt working hard enough? What else could the problem be? This happened a few months ago (both on really hot days) and i burrped the system but there wasnt much air in there at all. The car also has no problems reaching normal operating temp on cold start.
Thanks
92 civic with GSR motor I/H/E. Not running aircon.
Then when coming home i decided to just sit in the middle of the road and there we go, the temp begins to rise again, start driving and the temp goes back down to normal level.
Got home and let the car idle in my drive way and yep it begins to rise again but stays at 3/4 and just seems happy to sit there. Pop the hood and the radiator fan is working it's **** off (sounds louder than usual), then the fan turns off (temp still at 3/4) and it immeditely drops to normal operating temperature.
Is it possible the fan isnt working hard enough? What else could the problem be? This happened a few months ago (both on really hot days) and i burrped the system but there wasnt much air in there at all. The car also has no problems reaching normal operating temp on cold start.
Thanks
92 civic with GSR motor I/H/E. Not running aircon.
#4
Honda-Tech Member
Re: I have a weird over heating situation
i would try bleed air out of the system. I had the same problem with an overheat and it was so bad smoke would come out the coolant reservoir! Fill the radiator to the complete max.. and make sure its to the max. all i had to do was let it idle for 30 mins with the heater on, but fan off.. radiator and reservoir cap off. works 100% everytime
i would check this before replacing the T stat.
i would check this before replacing the T stat.
#5
Honda-Tech Member
Thread Starter
Re: I have a weird over heating situation
If it was a bad T stat, wouldnt it have problems heating up on cold starts? I only replaced the t stat about 40 000 km ago, genuine honda too!
#6
Honda-Tech Member
Thread Starter
Re: I have a weird over heating situation
i would try bleed air out of the system. I had the same problem with an overheat and it was so bad smoke would come out the coolant reservoir! Fill the radiator to the complete max.. and make sure its to the max. all i had to do was let it idle for 30 mins with the heater on, but fan off.. radiator and reservoir cap off. works 100% everytime
i would check this before replacing the T stat.
i would check this before replacing the T stat.
Last edited by mr_munro; 01-03-2012 at 08:50 PM.
#7
Honda-Tech Member
Thread Starter
Re: I have a weird over heating situation
well i bled the system with the heater on full blast until in the middle, but the radiator fan didnt come on. It didnt bubble at all, the coolant just stayed level with the top of the neck and stayed there. See how it goes from here on in!
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#8
Honda-Tech Member
Re: I have a weird over heating situation
your supposed to bleed the system with the heat turned to full red, but without the blower motor on, this makes it so the heater core is open as it can trap air. also make sure the car is on a level surface.
any smoke? check your oil for water or coolant, itll look like chocolate milk if this is the case, headgasket
any smoke? check your oil for water or coolant, itll look like chocolate milk if this is the case, headgasket
#9
Honda-Tech Member
Thread Starter
Re: I have a weird over heating situation
your supposed to bleed the system with the heat turned to full red, but without the blower motor on, this makes it so the heater core is open as it can trap air. also make sure the car is on a level surface.
any smoke? check your oil for water or coolant, itll look like chocolate milk if this is the case, headgasket
any smoke? check your oil for water or coolant, itll look like chocolate milk if this is the case, headgasket
#10
Re: I have a weird over heating situation
Try it again, if you can have the front raised a little that helps.
Put heater to hot setting, leave fan off.
Let it run for about 25 mins, fan should come on at least one time, two times is ideal.
#12
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#14
Honda-Tech Member
Thread Starter
Re: I have a weird over heating situation
its spins, if that is what you mean't, as to its effiecency im not sure. Is it suppose to PUSH or PULL ?
#17
Honda-Tech Member
Re: I have a weird over heating situation
i hope its just air in the system. i know have nerve wrecking it could be cause your always worrying if its a bad head gasket.
#18
Honda-Tech Member
Thread Starter
Re: I have a weird over heating situation
By the way, if i wanted to do a flush, i need to let coolant out of the block aswell through that big bolt in front of the block? Any idea how much coolant is left inside the block?
Thanks
#20
Honda-Tech Member
Re: I have a weird over heating situation
Yea pretty much. Im not blowing any smoke nor is my oil milky. It has been alright since i gave it a quick bleed so see how it goes.
By the way, if i wanted to do a flush, i need to let coolant out of the block aswell through that big bolt in front of the block? Any idea how much coolant is left inside the block?
Thanks
By the way, if i wanted to do a flush, i need to let coolant out of the block aswell through that big bolt in front of the block? Any idea how much coolant is left inside the block?
Thanks
Also a tip is to not let a big amount of coolant to puddle on the drive way and make sure not to dump the coolant responsibly. Pets will be attracted the the sweetness and it can potentially harm them.
#21
Honda-Tech Member
Re: I have a weird over heating situation
If you notice the overflow tank filling up on longer drives, it's most likely your headgasket. My CRX is doing this right now
Also feel the lower radiator hose, if the thermostat is stuck closed causing you to overheat the bottom hose should generally be cold, even when temp gauge says it's warmed up.
Also feel the lower radiator hose, if the thermostat is stuck closed causing you to overheat the bottom hose should generally be cold, even when temp gauge says it's warmed up.
#24
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