Car overheating

Tiny
BHIBBERTS
  • MEMBER
  • 1998 HONDA CIVIC
  • 4 CYL
  • FWD
  • MANUAL
  • 250,000 MILES
Car started running hot. Eventually blower head gasket. Have replaced head gasket, heater core, thermostat, it still runs hot but for some reason does not register on the temperature gauge. It only has one fan. The other fan is for the air conditioner. But the fan is straight wired. Please help.I have put to much money in this car
Monday, February 8th, 2016 AT 7:47 AM

12 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If head gasket is not the problem and was put on correctly then when it gets hot feel for cold spots in radiator when fan is disabled, if you feel any then the rad is bad
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Monday, February 8th, 2016 AT 8:04 AM
Tiny
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  • 8 POSTS
We also replaced the radiator.I'm fed up with this car. Is there anything else it could be
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Monday, February 8th, 2016 AT 8:06 AM
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
Are you sure that you burped all the air out of the cooling system? Make sure you have the heat on when bleeding the system. Do you have a scan tool that tells you the actual temp it is running? Both fans should turn on if it gets too hot or when the a/c is on.
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Monday, February 8th, 2016 AT 8:35 AM
Tiny
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  • 8 POSTS
I don't have a tool and the air conditioner does not work, so should both fans still have to run
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Monday, February 8th, 2016 AT 9:08 AM
Tiny
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  • 8 POSTS
I can tell you that when it gets so hot it boils
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Monday, February 8th, 2016 AT 9:10 AM
Tiny
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  • 8 POSTS
I can tell you that when it gets so hot it boils and I've noticed that sometimes the hose will be suctioned together
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Monday, February 8th, 2016 AT 9:11 AM
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
If it's boiling then try replacing the cap and see if that helps. If it's not holding pressure then coolant can boil. If it's really getting hot then both fans should turn on.
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Monday, February 8th, 2016 AT 9:12 AM
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
Did you burp the air out of the system?
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Monday, February 8th, 2016 AT 9:13 AM
Tiny
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  • 8 POSTS
Yes and also replaced the cap
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Monday, February 8th, 2016 AT 9:16 AM
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
Are you sure it's boiling and it's not bubbles from combustion gases getting into the coolant. I know you replaced the head gasket.
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Monday, February 8th, 2016 AT 9:18 AM
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
Try this to be sure all air is out.

Remove cap, start engine and turn on the heat, let idle till it warms up, When it reaches operating temperature begin raising the idle up to about 2500 rpm and hold for about 5 seconds, do this a few times while watching your coolant level in the radiator, be sure you have heat at idle, till the bubbles subside and the level is good, then return cap and the system should be bled.
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Monday, February 8th, 2016 AT 9:26 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You could have a crack in head that was missed if it still overheats and all that stuff was replaced or if it heats immediately then it may have the tstat in backwards. That is about it if everything has been replaced, etc.
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Monday, February 8th, 2016 AT 9:27 AM

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