DIY: How To Replace 2001 - 2005 Honda Civic Thermostat 

I try to help :)

You're welcome. Thank you for watching!

Glad to help!

Appreciate that, thank you

They are temperature controlled. They turn on and off based on coolant temp readings

Thanks for letting me know!

Lots of penetrating oil with time to soak in overnight would be my recommendation

I would grab a new one from Honda if you keep having duds. The standard parts store stuff isn't the best

@@RiggsGarage My '01 runs super hot, and I had the TH replaced about 2 yeas ago in Phoenix, and no I am In la Vegas in daily 100 degree heat. It has never actually overheated, but has went into the limp mode one night after driving it hard, but it also seems to suddenly be low on oil (and coolant) if I don't watch it like hawk, and now I think the fan is not comin on, though it works with AC on. But I do have a Honda thermostat ready I got on Ebay, and that new fan sensor piece on the housing too, and a new relay I'm going to switch. I wonder if I should do that other coolant sensor too while the guy is in there? I actually have a new radiator hose too (lower I think), but these mechanics keep telling me don't worry about the hose for some reason.

Good work!

Thanks for the comment, have a good one!

Right, once I sealed the thermostat, I filled the system to the top, put the burp funnel on and filled that up. Once the thermostat opens, it draws in a lot of the additional fluid in the funnel as it is burped and air leaves the system

@@RiggsGarage I’m looking at replacing the thermostat on my son’s 2001 Civic, hopefully tomorrow, since the temp gauge is fluctuating up and down.

You have a coolant leak somewhere, you need to identify that and fix that

I filled it to the full line after I burped it and the car was fully hot and thermostat open

Head gasket. The factory head gasket fails on these all the time. Exhaust gas leaks into the cooling system, pushing coolant out the reservoir. As long as you keep the radiator topped off, you can drive it like that until you get it fixed.

Could be a number of things, you will have to diagnose it. Could be temperature gauge, air in the system, head gasket, many different things. Could also be low coolant leaving the temperature sensor exposed to air which would give you the wonky readings. Could be the gauge itself.

The coolant fans will kick on when the temperature gets to the threshold, then they will kick back off. They should also kick on when you turn the air conditioner on so they can pull air through the condenser and give you cold air

@@RiggsGarage thank you for your expertise Riggs. You the man. Appreciate you. 🙏🏽✊🏾

Same here..mine never come on even when l was in l Vegas and AZ 100 dg desert heat unless pushed AC button..felt like driving with a oven under the hood...a pizza oven. I changed the coolant sensor.

Most of the new style thermostats come with the rubber seal, there is no gasket. Just did a couple last week that came with them

Wrongo!!

Tight

1 ooga dooga will do fine

@@Dabrandman13 Yes!

It's 104 in lbs