Re: Warm up times ?
Not sure how warm the diesel is supposed to get, but if it isn't as warm as it used to be my guess is either the temp sensor is bad or the thermostat failed open. On my old ZJ the thermostat failed open, in the middle of winter. While my engine temp never went above 120 degrees or so, it was definitely a bit chilly in the cabin.
My Jeep: 2001 Grand Cherokee Limited, 245/65R17 Falken Rocky Mountain ATS, K&N drop in air filter, Bilstein HD's. De-badged, eagle-eye LED Tails & LED 3rd brake light, Addco front and rear sway bars, Superchips tuned & TM snip, interior 6k LED's, Gen3 ccfl projectors with Volt 6k HID lows, akebono brake upgrade with R1 Concepts premium rotors.