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Old 05-11-2012, 07:24 PM   #1
MikesEJ1
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Default Engine running a little hot 94 civic ex

after the engine warms up,the coolant temp gauge goes up a little and comes down back to normal.It does not overheat,burn/loose coolant,or smoke and the rad fan and condensor fan both work.Also when its hotter than normal if you rev the engine to 2,000-3,000 rpms it cools back down to normal.not sure if its the thermostat stuck or the water pump is worn and not cooling properly.Any tips or info would be great,thanks
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Old 05-11-2012, 08:02 PM   #2
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Default Re: Engine running a little hot 94 civic ex

Does your fan come on? When last have you changed your coolant? Typically that symptom would be a weak thermostat spring or a sticking thermostat.. If the water pump was bad, there would usually be an indication of water loss or a growling noise from pulley (behind timing cover)
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Old 05-12-2012, 03:31 AM   #3
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Default Re: Engine running a little hot 94 civic ex

Has the waterpump ever been changed?
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Old 05-12-2012, 05:08 AM   #4
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Default Re: Engine running a little hot 94 civic ex

im having the same issue. Hoping to find solutions.
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Old 05-12-2012, 05:19 PM   #5
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Default Re: Engine running a little hot 94 civic ex

changed the thermostat today and bleed the coolant and its a little better.The gauge rises a fraction of what it used to...but when the fan comes on it cools back down.Also when its running hot if you turn the heat on it cools down right of way.hmmmm maybe I have to bleed it better or possible poor coolant flow like a clogged radiator?
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Old 05-12-2012, 05:34 PM   #6
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Default Re: Engine running a little hot 94 civic ex

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Has the waterpump ever been changed?
????
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Old 05-12-2012, 05:44 PM   #7
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Default Re: Engine running a little hot 94 civic ex

well i have to check the water pump,I'm not sure im the third owner.it doesn't leak or make noise but it still might not be cooling the system right i guess
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Old 05-12-2012, 05:45 PM   #8
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Default Re: Engine running a little hot 94 civic ex

also when the engine was hot i took the radiator cap off and no coolant sprayed out,like it was under no pressure...I don't think thats normal
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Old 05-12-2012, 08:33 PM   #9
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Default Re: Engine running a little hot 94 civic ex

Maybe your radiator cap is bad, it might not be holding the correct pressure... Do a pressure test... 15lbs
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Old 05-13-2012, 03:13 PM   #10
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Default Re: Engine running a little hot 94 civic ex

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Originally Posted by CivicBlacksheep View Post
Maybe your radiator cap is bad, it might not be holding the correct pressure... Do a pressure test... 15lbs
well it turned out my radiator cap was broken
the part of the cap that creates pressure was broken off.I bleeded the cooling system 3 times and there are tons of air bubbles coming out,but was else can cause that much air in the cooling system?
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