Low Temps and boiling sounds 3.8L

[Ivycon]

Hi everyone,

2010 3.8L 170k miles

My gauge is reading that my engine isn’t reaching operating temps for a couple of weeks now. (It’ll be at like 160ish.) then one day I was idling at lunch and my water started boiling over and the temp got up to operating and a little more. Once I was in drive that issue went away but still ran cool.

So I replaced the thermostat and water pump but am still seeing this issue. I got home from work today and I could hear the water boiling in the radiator. and my fan doesn’t kick on while driving.

If I put the ac on the engine will create a weird feeling when sitting at a traffic life.

Ive dug into this some and haven’t seen anything similar. Does anyone have any thoughts on where to start or what could be wrong?

Thanks in advance!

 

[BLACKJKU]

If you had the coolant drained out you'll need to burp the cooling system, remove the cap raise the front up about 6" and start the Jeep. Then as the coolant lowers add some more to it.

 

[Ivycon]

If you had the coolant drained out you'll need to burp the cooling system, remove the cap raise the front up about 6" and start the Jeep. Then as the coolant lowers add some more to it.

Thanks. I thought I burped it correctly. Filled it up, pressed the top hose multiple times to lower the coolant, fill it up more, ran it with the lid off, and then once dropped I added more. I can try this method you mentioned though.

 

[Dirty Dog]

Thanks. I thought I burped it correctly. Filled it up, pressed the top hose multiple times to lower the coolant, fill it up more, ran it with the lid off, and then once dropped I added more. I can try this method you mentioned though.

If you don't elevate the nose, you will never get all the air pockets out.