Ok so trying to get the jeep smoged today when I let her idle for a period of say 45 mins the resivior fills up and starts to **** what is my issue ? And can I run Mercedes Benz coolant it's an ethylene glycol base ?

 

Green coolant and this cap from NAPA. 703-1396. How's your fan clurch?

 

It's a fan and its got a clutch it works jeep don't heat up. The stuff I have isn't green it's blue. But is an ethyline glycol base majority really but safe for aluminum. The green stuf corrodes aluminum

 

Some coolants if u mix them they turn into gel. Stay with green standard coolant

 

I've used green coolant in aluminum engines for years. Has to be in the correct concentration. Only thing aluminum on our Jeeps is the water pump and thermostat housing anyway. Is it pissing out the cap of the coolant bottle?

 

dont forget the pistons...

 

I was referring to things that are SUPPOSED to have coolant flowing around them. LOL.

 

Ya it gurgles And makes a boilin sound and then pisses our the cap I've replaced the cap before I bought it the po had just put a new thermo stat housing on

 

Since aluminum is aluminum, neither the Jeep nor the MB is likely to recognize the different food colorings used in the ethylene glycol based extended life antifreeze/coolant.....presuming the blue stuff is extended life.

 

I Dont Know what it is it says Mercedes Benz anti corrosion agent/ antifreeze coolant made in the USA for Mercedes Benz USA llc montvale nj warning contains eythline glycol and dieythline glycol

 

If it says made for MB, no tellin' who actually makes it. The green stuff I use (Prestone) in all our vehicles says "all makes, all motors, mixes with all colors" or something to that effect.

 

Ya well I just used the mb stuff because its free and it's an eythiline base. I'm more concerned about the pissing coolant eery time I shut it off!

 

Could be a bad cap/bottle combo. Pressure is what raises the boiling point of the coolant. If it's boiling, either it's not holding pressure or it is overheating or both. Time for some cooling system maintenance.

 

Ya it needs it it's pretty tweakerd out

 

That could also be your thermostat not opening or only opening slightly. It will cause your system to back up and come out the over flow resivor.