My '96 Honda Civic is overheating. Either my head gasket is blown or my water pump is frozen.
It overheats when...
- I start it and let it run in the driveway for 5 minutes.
- I run it up and down the street by our house.
What I've Tried
Between each step, the car still overheated.
- Checked coolant. (I used a 50/50 premix blend). Coolant is okay.
- Checked/replaced thermostat.
- Checked/replaced thermo switch.
- Jumped power to fan: it runs when jumped.
- Flushed/filled radiator.
- Replaced radiator cap.
- Replaced radiator.
- Bled cooling system by the book.
There is absolutely no milkiness on dipstick.
There is no evidence of mixing of coolant and oil visible when I pulled off the valve cover.
There is no leaking coolant on the ground.
There is no white vapor from the tailpipe.
There is no sweet odor from the tail pipe.
There is no moisture or puddling in the floorboard.
The lower radiator hose is soft and flexible and not at all hot to the touch.
I used a head gasket test kit from the auto parts store:
The first read was nearly an immediate color change from blue to green.
The second and third tests showed no color change at all.
It is possible that I mistakenly sucked some radiator fluid into the test chamber the first time.