Best answer is to check the owner's manual. If car is missing that, go to a Chrysler dealer and pick a manual up. All fluid replacement intervals are spelled out in the manual.
I Believe it's recommended to change it every 60000 miles (100000km) Every 100,000 miles should be sufficient.
The 2.4L uses 4.5 quarts.
The thermostat on a Chrysler PT Cruiser is changed by disconnecting the upper radiator hose, unbolting the thermostat housing, and removing the thermostat. A new unit can then be put in place and reattached.
Conventional motor oils have recommended 3,000-mile drain intervals. Synthetics motor oils have recommend 5,000 - 25,000-mile drain intervals.
Recommended at 100,000 miles.
Tuning up a Chrysler PT Cruiser can be done at home or by a mechanic. A tune up will consist of an oil change, changing the spark plugs and wires, air filter, and distributor cap.
In order to change the timing belt in your PT Cruiser you will need the new tensioner and timing belt covers. Your dealership should have the parts you need
In order to change the evaporator in Pt Cruiser, the entire dash has to be removed, then replace the evaporator, and reinstall the complete dash.
about 3 hours if you know what you are doing
Book time is about 8 hours.
Make sure to follow recommended service intervals, change oil and filter and change airfilter.