I have a '93 Camry wagon with the 4 cyl. The engine has been great and VERY easy to maintain and now has 196,000 miles and still runs perfect.
The engine has never been opened and the valves have never even needed an adjustment. The only things done to the engine are:
1) timing belt and pulleys
2) water pump
3) thermostat
4) two engine mounts
5) spark plugs, dist cap, rotor, wires
6) ignition coil
7) lots of oil changes - from 3000 to 5500 miles OCI
8) coolant hoses as a precaution
9) PCV valve
10) change antifreeze
That's it! I do not think this engine is prone to head gasket failures as one post above suggests.
The rest of the car has been even easier:
transimission, NOTHING other than fluid changes
differential, fluid change
Wiper blades replaced
window regulator on driver;s side
door handle on driver's door
That's it.
original muffler and exhaust
all original suspension, including shocks/struts still original
Still runs and drives very, very good and reliable as all heck.
I wish they still made these durable, versatile wagons.