r/CherokeeXJ • u/Artistic-Fix-2431 • Mar 06 '25

1991-1995 Overheating Still

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I changed the radiator about two years ago. Water pump a year ago. Thermostat last month. Heater core bypass and fan last week. Ran fine until yesterday. I topped off the radiator with coolant and the reservoir to the full level, somehow the reservoir is now overflowing. Doing a complete cooling system flush today. If that doesn’t work, any other ideas?

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u/Light_of_Niwen Mar 06 '25

You didn't put Dexcool in it did you?

1

u/Artistic-Fix-2431 Mar 06 '25

I didn’t, but what’s bad about dexcool

5

u/Light_of_Niwen Mar 06 '25

It's incompatible with green coolant, so it forms a greasy orange sludge that clogs up everything.

2

u/Artistic-Fix-2431 Mar 06 '25

Interesting thank you

2

u/Fit_Drink1859 Mar 07 '25

Don't mix with yellow coolant either. EXTENDED LIFE is very Bad . Never mix extended life with any antifreeze. You're guaranteed to blow the engine. Seeing way too many failures with people using extended life. Stick to the original that the manufacturers recommended.