CMDR Karos

I just replaced my head gasket for the second time because I kept loosing coolant. Today was a really hot day and I was sitting in drive through and the fan didn't turn on until my temp gauge was at 3/4. It does turn on eventually but I don't like seeing the needle go that high. I have a OBD2 tool that tells me it doesn't go on until my coolant gets to 230-235F. I've taken the connector off the sensor and stuck a wire in it and the fans turn on. For some reason they just turn on really late. I replaced the sensor about a year ago because my fans were not kicking on.

Anyone ever have this problem before? I'm letting the car cool down right now so I can open the radiator cap and see if maybe its low on coolant. I really hope the head gasket didn't go again. I changed the headgasket on saturday and sunday but this week so far I haven't driven that far and today on thursday I sat in drive through and saw it. I also had my A/C running at the time so I don't know if that has anything to do with it.

Colin42

Did you use an OEM sensor?

Wankenstein

Try replacing the radiator cap (Honda genuine only). Is the reservoir gaining coolant?
While you're looking inside the radiator with engine running...rev the engine a note the coolant flow to rule out a water pump issue. Also, get a high temp thermometer and insert it into the radiator neck for a true temp reading.

CMDR Karos

I got the sensor from autozone. i don't remember the brand.

CMDR Karos

The radiator is only 3 months old. The cap came with it. On the coolant line that feeds my heater core I have a filter that is clear and I can see the coolant flowing when i turn the heater on so I think I have water pressure. One thing I did notice was that my thermostat is missing that little brass piece and just has a hole in it.




With the thermometer I'll have to get back with you on that because I don't have one so I'll have to go pick one up.

Colin42

so that's a no,
probably needs the proper one