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Old 25 Feb 2004, 04:49 pm
Atticus
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Default 91 Honda Civic Overheating...

I bought my '91 Honda Civic DX a year ago. It has high miles (184000+) and was running fine. Until about 6 months ago. It started to heat up and then cool down. I realized the rad was quite rusty. So I was driving to get it fixed and "Blamm-O!" head gasket blew. I had it towed to my bro's house. Went and bought a new head gasket and started our work. Got the new gasket on and put it back together. Ran fine for a month. Then, it started the hot/cold crap again. I thought maybe I would change the thermostat. I did. I also added coolant. It was fine....... But only for a couple months. Again...the hot/cold temp garbage. It is highly erratic. I think, maybe, because of the fact that "we" changed it ourselves, that there maybe a small leak. Especially after finding this forum thread:
http://ths.gardenweb.com/forums/load...160718633.html

Everything was done to spec. But something just seems to be wrong. I don't know. The rad is new, water pump is fine, new thermostat. and fans come on. Any suggestions for me?

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Old 25 Feb 2004, 06:10 pm
Stewart DIBBS
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Default Re: 91 Honda Civic Overheating...


"Atticus" <unlimited3d@hotmail.com> wrote in message
news:9d762a4d9d7a3eb231e4c50e667eb30b@localhost.ta lkaboutautos.com...
> Got the new gasket on and put it back together. Ran fine for a month.

Then, it started the hot/cold crap again.

Did you have the head serviced when you did the gasket? Could be the head is
warped, or there's a crack in it thats letting exhaust gas into the water
jacket.

Stewart DIBBS


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  #3 (permalink)  
Old 25 Feb 2004, 06:47 pm
'Curly Q. Links'
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Default Re: 91 Honda Civic Overheating...

Atticus wrote:
>
> I bought my '91 Honda Civic DX a year ago. It has high miles (184000+) and was running fine. Until about 6 months ago. It started to heat up and then cool down. I realized the rad was quite rusty. So I was driving to get it fixed and "Blamm-O!" head gasket blew. I had it towed to my bro's house. Went and bought a new head gasket and started our work. Got the new gasket on and put it back together. Ran fine for a month. Then, it started the hot/cold crap again. I thought maybe I would change the thermostat. I did. I also added coolant. It was fine....... But only for a couple months. Again...the hot/cold temp garbage. It is highly erratic. I think, maybe, because of the fact that "we" changed it ourselves, that there maybe a small leak. Especially after finding this forum thread:
> http://ths.gardenweb.com/forums/load...160718633.html
>
> Everything was done to spec. But something just seems to be wrong. I don't know. The rad is new, water pump is fine, new thermostat. and fans come on. Any suggestions for me?


============

Maybe this is too basic, but here's some suggestions. Any time you have
a fluctuating temp guage, you should shut off the engine (let it cool)
and check the coolant level in the rad, and top it up in the rad and
also the expansion tank. Next morning, you should check the level before
you start the engine.

Any time you work on the cooling system you should check the coolant
level EACH time you go to use the car because it 'burps' out some air
after it's been worked on. It may also have leaks that will manifest in
low coolant level.

Hondas don't run well without coolant. As they get older, they require
just a little more vigilance to prevent catastrophe.

'Curly'
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  #4 (permalink)  
Old 26 Feb 2004, 06:49 am
Stewart DIBBS
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Default Re: 91 Honda Civic Overheating...


"'Curly Q. Links'" <motsco__@interbaun.com> wrote in message
news:403D4217.AB0CC86F@interbaun.com...
> Hondas don't run well without coolant.


I don't know of ANY liquid cooled engine that runs well without coolant ...


Stewart DIBBS


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  #5 (permalink)  
Old 26 Feb 2004, 10:07 am
Atticus
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Default Re: 91 Honda Civic Overheating...

Thanx guys. The thing I don't understand is the car isn't loosing any performance. No pinging, like the first time when the car overheated. My bro had a haynes manual and said he did the tests to see if the head was warped as explained in the book. (I have no idea what that includes.)
anyone think it might be a problem with the Temp Sending Unit? Also, I don't get why after evertime I change the thermostat it's fine for a few months. I'm going crazy. I don't have the $$ the continue fixing this car. I may just get rid of it.

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  #6 (permalink)  
Old 26 Feb 2004, 10:07 am
Atticus
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Posts: n/a
Default Re: 91 Honda Civic Overheating...

Thanx guys. The thing I don't understand is the car isn't loosing any performance. No pinging, like the first time when the car overheated. My bro had a haynes manual and said he did the tests to see if the head was warped as explained in the book. (I have no idea what that includes.)
anyone think it might be a problem with the Temp Sending Unit? Also, I don't get why after evertime I change the thermostat it's fine for a few months. I'm going crazy. I don't have the $$ the continue fixing this car. I may just get rid of it.

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  #7 (permalink)  
Old 26 Feb 2004, 01:28 pm
electricked
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Default Re: 91 Honda Civic Overheating...

Try replacing the radiator cap and if you haven't done so already (I replace
mine everytime I change coolant. it's cheap a few dollars). Anyway, if you
know what you are doing test the temperature sending unit of the cooling
system. On mine, it's located on top of the thermostat housing (98 accord).
If the car is not overheating but the temp sending unit show it is, it
should be fine after it's been replaced.

If you can't find the TSU, do some googling and try to find its location. In
the meantime check in here, you'll probably get more advice.

--Viktor

"Atticus" <unlimited3d@nospam.hotmail.com> wrote in message
news:17e06f8928af6fbf1f15d6e00e2b953d@localhost.ta lkaboutautos.com...
> Thanx guys. The thing I don't understand is the car isn't loosing any

performance. No pinging, like the first time when the car overheated. My bro
had a haynes manual and said he did the tests to see if the head was warped
as explained in the book. (I have no idea what that includes.)
> anyone think it might be a problem with the Temp Sending Unit? Also, I

don't get why after evertime I change the thermostat it's fine for a few
months. I'm going crazy. I don't have the $$ the continue fixing this car. I
may just get rid of it.
>



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