02 accord overheating when idle (tried everything)
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Junior Member
Joined: Aug 2011
Posts: 40
To be more specific, the water pump circulates the coolant from the radiator top tank, thru the engine block and back out to the bottom tank . It is then cooled by the airflow across the fins of the core before it reaches the top tank again. If the thermostat isn't opening fully or is the wrong heat range, there will be little to no movement of the coolant in the top tank. Open the radiator cap (***WITH ENGINE COOL***) and start the engine. Let it idle until it reached normal temp, the thermostat should be open at this point, and the coolant will circulate through the engine block. Look at the coolant for signs of flow and movement in the top tank of the radiator, NOT the overflow bottle.
When warmed up I could see no movement of any water in the radiator. I topped it off with the overflow later, got it hot, and it still filled up the overflow. What the heck is going on....?
Almost A Senior Member
Joined: Jun 2011
Posts: 227
From: Huntington Beach, Ca.
Since you have no coolant circulating through the engine block, it has to be a bad thermostat. That is the only way for coolant to enter the engine, and if it is stuck or just gone bad, that explains why you have the problem... It isn't a big deal to fix, and it is under $20 from Honda for the correct,and quality part.
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Junior Member
Joined: Aug 2011
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I took it to a shop and they said it's a blown head gasket, 100% sure they said. They said they did a pressure test and it's definitally the head gasket. Sound about right? I asked him if he could guarantee it 100% and he said yes and that it'll be fixed for about 600 guaranteed...
Super Moderator
Joined: Sep 2006
Posts: 16,331
From: Houston, TX
The head gasket is a seal between the cylinder head and the engine block.
It seals the combustion chambers from the oil passages and coolant passages that go into the cylinder head. Depending on how the gasket failed, oil can mix with coolant, combustion gas/exhaust can get pushed into the coolant passages or other cylinders.
It seals the combustion chambers from the oil passages and coolant passages that go into the cylinder head. Depending on how the gasket failed, oil can mix with coolant, combustion gas/exhaust can get pushed into the coolant passages or other cylinders.
Almost A Senior Member
Joined: Jun 2011
Posts: 227
From: Huntington Beach, Ca.
I took it to a shop and they said it's a blown head gasket, 100% sure they said. They said they did a pressure test and it's definitally the head gasket. Sound about right? I asked him if he could guarantee it 100% and he said yes and that it'll be fixed for about 600 guaranteed...
Last edited by bigpat; Aug 8, 2011 at 08:24 PM.
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