Changing Thermostat on a 1999 civic
 

How do I change my thermostat on my 1999 civic?

It's taking a bit longer to warm up and I've read that changing the thermostat can clear this up....

it's taking almost 20 min to warm up and that's with the HEAT off!!! If I turn the heat on...it'll take forever

after it does worm up, when you take it on the highway does the temp. drop down? if so it is most likely your thermostat.
after quick google search i found this diagram. take a look
http://media.honda.co.uk/car/owner/m...l/pdf/10-7.pdf

yea it does drop on the highway!

thanks for the link but i need to know how to remove it.

it is easy find the top hose coming off the rad fallow that to the motor i think it is 2 10 mm bolts but its been a bit but i would drain all the coolant when you do it

theres 3 10 mills,after you take it off, the thermostat will be placed inside, take it out and replace it with a new one, might be a little tricky putting it back on with the new thermostat as it likes to pop out, and like jcivic said, you should drain all the coolant, or atleast everything thats inside the hose, so you dont get any on yourself in the process.

Drain coolant
Remove lower rad hose
Remove 3 10mm bolts
Remove housing and thermostat (might have to get pliers to pop the therm. out of there)
Remove all gaskets/sealer/silicone in there
Put a bit of silicone on each side of the gasket
New thermostat in, put the housing on and its gravy from there. Just make sure you bleed the coolant until both rad hoses are the same temperature.

don't forget to use honda thermostat which works the best and fits snugg and tight just how I like it. heheheh that sounded gay..lol

just changed my thermostat....only had to remove 2 10mm bolts tho? either way...the rad fluid came out when i took the hose off...replaced the thermostat...put it back in...topped off my rad fluid....let the car run for 5 min and topped it back off again. Went for a 20 min drive...checked fluid and it's still full and car is nice and warm again!!

thanks every1 for ur input

good thread man, any recommendations on flushing it out ?
where are the bleed screws ?

Not every engine will have a bleeder screw
But the majority of them will be at the on the engine side of the upper hose.
I had an LS with it right there, But like i said, not all engines have them.
If they dont, one way is to just start car up with rad cap off, top rad off with coolant as needed. Once it hits Operating temp *fan kicks on twice*. Then fill it to the top and it should be ready to go.

My B20 didnt have a bleeder screw either. so id play with the upper hose as the engine was on, to make sure theres no air stuck in the hose. Since it is the highest point of that system

yea **** sex is pretty gay=P

good one ^...

no bleed screws...