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#1
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Cold engine at 70Mph
Hi all,
I was driving my 91 Honda Accord on the interstate the other day when it was near freezing outside. I noticed that the engine temperature was near 'C', even after driving at 70Mph for more than 15min! I had to turn the heat all the way up to get a comfortable temperature inside the car. Once I exited the highway and slowed down, the engine temperature began to rise toward half-way between 'C' and 'H', where it usually is. Is the above normal? Is the radiator over-cooling the engine? I am assuming that a cold engine 70Mph is not good for the car. Thanks for any advice. Fijoy |
#2
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Cold engine at 70Mph
On 12/9/10 2:18 PM, Fijoy wrote:
> Hi all, > > I was driving my 91 Honda Accord on the interstate the other day when > it was near freezing outside. I noticed that the engine temperature > was near 'C', even after driving at 70Mph for more than 15min! I had > to turn the heat all the way up to get a comfortable temperature > inside the car. Once I exited the highway and slowed down, the engine > temperature began to rise toward half-way between 'C' and 'H', where > it usually is. > > Is the above normal? Is the radiator over-cooling the engine? I am > assuming that a cold engine 70Mph is not good for the car. > > Thanks for any advice. > > Fijoy The thermostat is probably stuck open. |
#3
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Cold engine at 70Mph
On 12/09/2010 01:18 PM, Fijoy wrote:
> Hi all, > > I was driving my 91 Honda Accord on the interstate the other day when > it was near freezing outside. I noticed that the engine temperature > was near 'C', even after driving at 70Mph for more than 15min! I had > to turn the heat all the way up to get a comfortable temperature > inside the car. Once I exited the highway and slowed down, the engine > temperature began to rise toward half-way between 'C' and 'H', where > it usually is. > > Is the above normal? Is the radiator over-cooling the engine? I am > assuming that a cold engine 70Mph is not good for the car. > > Thanks for any advice. > > Fijoy 1. it's going to take longer to warm up if the heater is on. in cold weather, a lot longer. 2. at high rpm's, and thus high coolant flow pressure, it's possible for the thermostat valve to be sprung open - the effect would be the same as having the heater on - it'll take longer to warm up. 3. the thermostat might be defective and jammed open. [i've also seen them with debris/foreign matter jammed inside, again preventing them from closing properly.] if this is still the original nearly 20-yo thermostat, i'd recommend changing it. -- nomina rutrum rutrum |
#4
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Cold engine at 70Mph
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#5
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Cold engine at 70Mph
Thus spake Tegger > :
>Fijoy > wrote in news:a5f058bf-3858-4c56-88c1- : > >> Hi all, >> >> I was driving my 91 Honda Accord on the interstate the other day when >> it was near freezing outside. I noticed that the engine temperature >> was near 'C', even after driving at 70Mph for more than 15min! I had >> to turn the heat all the way up to get a comfortable temperature >> inside the car. Once I exited the highway and slowed down, the engine >> temperature began to rise toward half-way between 'C' and 'H', where >> it usually is. >> >> Is the above normal? Is the radiator over-cooling the engine? I am >> assuming that a cold engine 70Mph is not good for the car. >> > > > >The /thermostat/ is overcooling the engine. You need to replace it. > >Use a genuine Honda thermostat ONLY. It's about $30, but well-worth the >money. Yes, my thought, also. Once you get the antifreeze out, swapping out the 'stat is easy. Purging the coolant is a pain, at least for me. -- - dillon I am not invalid An object's desireability to a dog is directly proportional to its desireability to another dog. |
#6
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Cold engine at 70Mph
It helps to open the bleeder.
On 12/12/2010 10:13 AM, Dillon Pyron wrote: > > Once you get the antifreeze out, swapping out the 'stat is easy. > Purging the coolant is a pain, at least for me. |
#7
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Cold engine at 70Mph
Thus spake dan > :
>It helps to open the bleeder. Oh sure. Some people want the quick and easy way out. When I was a kid we had to combine hydrogen molecules with free oxygen radicals before we could fill our stone radiators. :-) >On 12/12/2010 10:13 AM, Dillon Pyron wrote: > >> >> Once you get the antifreeze out, swapping out the 'stat is easy. >> Purging the coolant is a pain, at least for me. -- - dillon I am not invalid An object's desireability to a dog is directly proportional to its desireability to another dog. |
#8
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Cold engine at 70Mph
On 12/13/10 21:45, Dillon Pyron wrote:
> Thus spake > : > >> It helps to open the bleeder. > > Oh sure. Some people want the quick and easy way out. > > When I was a kid we had to combine hydrogen molecules with free oxygen > radicals before we could fill our stone radiators. :-) You had H and O2 molecules - *luxury*! |
#9
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Cold engine at 70Mph
On Dec 9, 4:18*pm, Fijoy > wrote:
> Hi all, > > I was driving my 91 Honda Accord on the interstate the other day when > it was near freezing outside. I noticed that the engine temperature > was near 'C', even after driving at 70Mph for more than 15min! I had > to turn the heat all the way up to get a comfortable temperature > inside the car. Once I exited the highway and slowed down, the engine > temperature began to rise toward half-way between 'C' and 'H', where > it usually is. > > Is the above normal? Is the radiator over-cooling the engine? I am > assuming that a cold engine 70Mph is not good for the car. > > Thanks for any advice. > > Fijoy Hi all, Thanks for the responses. I am thinking of changing the thermostat myself, but I am a novice. I cannot not figure out where the thermostat is, even after a google search. Is it on the lower radiator hose, or the upper one? Do I absolutely have to drain the cooling system to change it? Fijoy |
#10
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Cold engine at 70Mph
On 12/11/10 4:49 PM, Fijoy wrote:
> On Dec 9, 4:18 pm, > wrote: >> Hi all, >> >> I was driving my 91 Honda Accord on the interstate the other day when >> it was near freezing outside. I noticed that the engine temperature >> was near 'C', even after driving at 70Mph for more than 15min! I had >> to turn the heat all the way up to get a comfortable temperature >> inside the car. Once I exited the highway and slowed down, the engine >> temperature began to rise toward half-way between 'C' and 'H', where >> it usually is. >> >> Is the above normal? Is the radiator over-cooling the engine? I am >> assuming that a cold engine 70Mph is not good for the car. >> >> Thanks for any advice. >> >> Fijoy > > Hi all, > > Thanks for the responses. > > I am thinking of changing the thermostat myself, but I am a novice. I > cannot not figure out where the thermostat is, even after a google > search. Is it on the lower radiator hose, or the upper one? Do I > absolutely have to drain the cooling system to change it? > > Fijoy Your willingness and sense of adventure are admirable--- but it sounds like you're over your head on this one. Take it to a repair shop... |
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