Overheating Issues
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Overheating Issues
my civic overheats unless the heater is on full blast, I have replaced a couple of things but the issue still stands.
Got a new rad a month ago ( Aftermarket)
replaced the thermostat
replaced the temp sensor for fan, on the thermostat housing.
fan works mechanically, i have tried completing the circuit and it turns on.
Both hoses are hot, so coolant is circulating.
The temp needle rises up and goes down quickly.
Appreciate any help!! thank you
Got a new rad a month ago ( Aftermarket)
replaced the thermostat
replaced the temp sensor for fan, on the thermostat housing.
fan works mechanically, i have tried completing the circuit and it turns on.
Both hoses are hot, so coolant is circulating.
The temp needle rises up and goes down quickly.
Appreciate any help!! thank you
Dr Krieger of Modification
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Re: Overheating Issues
Make sure the fans are working when they are supposed to; take her for a hard rip then pull over and check that they are on (I know you tested them with voltage, but a live check is better).
If no fluid is shooting into the overflow then hopefully the head gasket is ok.
Also check the water pump.
If no fluid is shooting into the overflow then hopefully the head gasket is ok.
Also check the water pump.
If you think a good mechanic is expensive, try hiring a bad one
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From: Midwest. Aiming about mid-chest
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i have tried completing the circuit and it turns on.
While the radiator was out did you check the condenser fins to make sure the airflow through it is not obstructed by dirt, bugs, sand, garbage?
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Does this mean you ran the fan direct from the battery, or does this mean you jumped the thermoswitch connector to make the fans run?
While the radiator was out did you check the condenser fins to make sure the airflow through it is not obstructed by dirt, bugs, sand, garbage?
While the radiator was out did you check the condenser fins to make sure the airflow through it is not obstructed by dirt, bugs, sand, garbage?
Also, I will check the condenser. I remember it being dirty, what could that have to do with it though?
Thank you for the idea!
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Make sure the fans are working when they are supposed to; take her for a hard rip then pull over and check that they are on (I know you tested them with voltage, but a live check is better).
If no fluid is shooting into the overflow then hopefully the head gasket is ok.
Also check the water pump.
If no fluid is shooting into the overflow then hopefully the head gasket is ok.
Also check the water pump.
What do you mean by fluid shooting?
If you think a good mechanic is expensive, try hiring a bad one
Joined: Dec 2011
Posts: 32,017
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From: Midwest. Aiming about mid-chest
Rep Power: 519 Re: Overheating Issues
Also, I will check the condenser. I remember it being dirty, what could that have to do with it though?
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From: Midwest. Aiming about mid-chest
Rep Power: 519 Re: Overheating Issues
Late 6th gens and early 7th gens had a run of flaky fan temp switches, have you replaced it yet?
All air needs to be burped from the cooling system if there is any, radiator and system full to the top with coolant (but not the reservoir, its max is only partway up, not completely full)
I'd use a scanner to watch the coolant temp reading seen by the engine computer (PCM).....verify that reading against a thermometer or infrared to check accuracy.
The temp of the water EXITING the radiator through the bottom hose has to be hot enough to turn on the fan temp switch, approx 203*F (which will probably not be the same temp reading as the computer is using)
All air needs to be burped from the cooling system if there is any, radiator and system full to the top with coolant (but not the reservoir, its max is only partway up, not completely full)
I'd use a scanner to watch the coolant temp reading seen by the engine computer (PCM).....verify that reading against a thermometer or infrared to check accuracy.
The temp of the water EXITING the radiator through the bottom hose has to be hot enough to turn on the fan temp switch, approx 203*F (which will probably not be the same temp reading as the computer is using)
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Late 6th gens and early 7th gens had a run of flaky fan temp switches, have you replaced it yet?
All air needs to be burped from the cooling system if there is any, radiator and system full to the top with coolant (but not the reservoir, its max is only partway up, not completely full)
I'd use a scanner to watch the coolant temp reading seen by the engine computer (PCM).....verify that reading against a thermometer or infrared to check accuracy.
The temp of the water EXITING the radiator through the bottom hose has to be hot enough to turn on the fan temp switch, approx 203*F (which will probably not be the same temp reading as the computer is using)
All air needs to be burped from the cooling system if there is any, radiator and system full to the top with coolant (but not the reservoir, its max is only partway up, not completely full)
I'd use a scanner to watch the coolant temp reading seen by the engine computer (PCM).....verify that reading against a thermometer or infrared to check accuracy.
The temp of the water EXITING the radiator through the bottom hose has to be hot enough to turn on the fan temp switch, approx 203*F (which will probably not be the same temp reading as the computer is using)
Okay thank you
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my civic overheats unless the heater is on full blast, I have replaced a couple of things but the issue still stands.
Got a new rad a month ago ( Aftermarket)
replaced the thermostat
replaced the temp sensor for fan, on the thermostat housing.
fan works mechanically, i have tried completing the circuit and it turns on.
Both hoses are hot, so coolant is circulating.
The temp needle rises up and goes down quickly.
Appreciate any help!! thank you
Got a new rad a month ago ( Aftermarket)
replaced the thermostat
replaced the temp sensor for fan, on the thermostat housing.
fan works mechanically, i have tried completing the circuit and it turns on.
Both hoses are hot, so coolant is circulating.
The temp needle rises up and goes down quickly.
Appreciate any help!! thank you
If you think a good mechanic is expensive, try hiring a bad one
Joined: Dec 2011
Posts: 32,017
Likes: 256
From: Midwest. Aiming about mid-chest
Rep Power: 519 Thread Starter
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