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Old 11 Mar 2005, 09:17 pm
John Smith
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Default Honda Accord engine coolant temperature high

I have a 1990 Honda Accord. The coolant temperature, if normal, is
right at the middle of the gauge. Recently, it has been as high as
4/5 of the gauge. I took it to a mechanics, thinking I might need
a new water pump. He checked it, told me the water pump was not
leaking, and did not change the water pump.

The thermocouple is fairly new, less than two years.

What might be wrong?
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Old 11 Mar 2005, 09:27 pm
Michael Pardee
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Default Re: Honda Accord engine coolant temperature high

"John Smith" <jsmith@company.com> wrote in message
news:8btYd.5477$nZ.475762@twister.southeast.rr.com ...
>I have a 1990 Honda Accord. The coolant temperature, if normal, is
> right at the middle of the gauge. Recently, it has been as high as
> 4/5 of the gauge. I took it to a mechanics, thinking I might need
> a new water pump. He checked it, told me the water pump was not
> leaking, and did not change the water pump.
>
> The thermocouple is fairly new, less than two years.
>
> What might be wrong?


It would help to know how it behaves. Does it warm up in about 5 minutes but
climb steadily to 4/5 scale instead of half scale then level off? Does it
warm up to half scale, level off, then rise more slowly to 4/5 scale? Is the
reading steady or does it waver, and if it does, how much and how fast? Does
it read higher at idle or at cruising speed, or doesn't matter?

And although it may sound like a dumb question, I suppose the coolant level
is okay and the coolant isn't disappearing? And the heater does still work?

All these things help rule out some possibilities and identify the most
likely suspects.

Mike


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  #3 (permalink)  
Old 11 Mar 2005, 09:57 pm
jim beam
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Default Re: Honda Accord engine coolant temperature high

Michael Pardee wrote:
> "John Smith" <jsmith@company.com> wrote in message
> news:8btYd.5477$nZ.475762@twister.southeast.rr.com ...
>
>>I have a 1990 Honda Accord. The coolant temperature, if normal, is
>>right at the middle of the gauge. Recently, it has been as high as
>>4/5 of the gauge. I took it to a mechanics, thinking I might need
>>a new water pump. He checked it, told me the water pump was not
>>leaking, and did not change the water pump.
>>
>>The thermocouple is fairly new, less than two years.
>>
>>What might be wrong?

>
>
> It would help to know how it behaves. Does it warm up in about 5 minutes but
> climb steadily to 4/5 scale instead of half scale then level off? Does it
> warm up to half scale, level off, then rise more slowly to 4/5 scale? Is the
> reading steady or does it waver, and if it does, how much and how fast? Does
> it read higher at idle or at cruising speed, or doesn't matter?
>
> And although it may sound like a dumb question, I suppose the coolant level
> is okay and the coolant isn't disappearing? And the heater does still work?
>
> All these things help rule out some possibilities and identify the most
> likely suspects.
>
> Mike
>
>

and don't check the coolant by looking at the expansion bottle!
/always/ look inside the radiator after removing the cap.

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  #4 (permalink)  
Old 12 Mar 2005, 03:54 am
J Oat
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Default Re: Honda Accord engine coolant temperature high

did you replace the thermostat with a honda or oem equivalent one ?
most aftermarket place tend to sell the "regular" thermostat vs honda
failsafe.
"regular" version ususally failed closed so the engine can get overheat.
failsafe die open

if it is a failsafe version than i have no idea other than the coolant might
be low

"John Smith" <jsmith@company.com> wrote in message
news:8btYd.5477$nZ.475762@twister.southeast.rr.com ...
> I have a 1990 Honda Accord. The coolant temperature, if normal, is
> right at the middle of the gauge. Recently, it has been as high as
> 4/5 of the gauge. I took it to a mechanics, thinking I might need
> a new water pump. He checked it, told me the water pump was not
> leaking, and did not change the water pump.
>
> The thermocouple is fairly new, less than two years.
>
> What might be wrong?



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  #5 (permalink)  
Old 12 Mar 2005, 11:55 am
Jason
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Default Re: Honda Accord engine coolant temperature high

In article <8btYd.5477$nZ.475762@twister.southeast.rr.com>, John Smith
<jsmith@company.com> wrote:

> I have a 1990 Honda Accord. The coolant temperature, if normal, is
> right at the middle of the gauge. Recently, it has been as high as
> 4/5 of the gauge. I took it to a mechanics, thinking I might need
> a new water pump. He checked it, told me the water pump was not
> leaking, and did not change the water pump.
>
> The thermocouple is fairly new, less than two years.
>
> What might be wrong?


I agree with the other posters that told you that the thermostat needs to
be changed--use a thermostat made by Honda. You should also check the
radiator water level--when the engine is cold. When I was very young--I
made the mistake of checking the radiator water when the engine was hot
and I have NEVER made that mistake again. I only check it in the morning
before I start the car.

--
NEWSGROUP SUBSCRIBERS MOTTO
We respect those subscribers that ask for advice or provide advice.
We do NOT respect the subscribers that enjoy criticizing people.



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