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Normal operating tmp is between 195 and 220
Approx 200 deg F
No.
Yes
Yes
Yes.
Not exactly. The body styles are different. A 1991 Jeep Wrangler is a YJ as a 1999 is a TJ. t
A 1999 Jeep does not have a cabin filter.
No.
NO, you will waste your time and money.
A 1999 Jeep uses R134a.
Keep the coolant temperature below 260 degrees Fahrenheit or you may overheat it.