Themostat

jeepmedic46 · **Posted:** Tue Dec 09, 2008 5:52 pm

Is it hard to change the themostat?

Guest · **Posted:** Wed Dec 10, 2008 12:11 am

Nope.

Might be for you though!

snowsport · **Joined:** Tue Oct 18, 2005 11:52 pm **Posts:** 1211

Not hard, but it can get messy. Best to drain the rad with the lower petcock first. Still going to be some coolant leak out when you unbolt the t-stat housing. Big bucket or pan will be your buddy. Take a good look at the hoses before you start in case you want to replace them. How long since it's had fresh coolant?

long_tall_texan · **Posted:** Wed Dec 10, 2008 12:41 pm

A partial re-post from another thread...

Look where the radiator hose goes into the block. Not sure if it is the upper or lower radiator hose. Just went out and looked at mine. I assume it is lower one. There is a flange bolted to the block that the hose connects to. Just remove the flange and the thermostat will come right out. You don't need to remove the hose from the flange. Go to the local ports store and pick up a new thermostat and flange gasket. Be sure to catch the anti-freeze to re-use, or buy new anti-freeze while you are at the parts store, because you will drain all of the coolant when you remove the flange.

Can someone that has replaced a thermostat on their KJ verify if it is the upper or lower hose? I haven't had to replace one yet on mine.

Here is the lower hose with the flange looking up from beneath the car...

Jeepjeepster · **Posted:** Wed Dec 10, 2008 1:15 pm

Its the lower hose.

Be careful with that housing, its plastic so dont over tighten the bolts.

jeepmedic46 · **Posted:** Wed Dec 10, 2008 1:56 pm

Thank you, About 30,000 miles since the coolant was changed, blew the water pump and was replaced at local repair shop.

Themostat

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