Toyota Repair: Timing Belt, idler pulleys, service history

Question
When I change my timing belt on my 91 Camry 4 cyl.should I change any other parts while I have the motor apart.I know there are seals but is there anything else. Thank You

Answer
It would be a good idea to replace the cam and crankshaft seals and also the water pump, it depends on when these parts were replaced the last time if at all, this being a 1991 model it's hard to say without me knowing the mileage and more details like service history.
Replacing these at the same time will probably save you some money in the future because if the water pump should fail shortly after the t-belt was replaced everything will have to be taken apart again, if it has a lot of miles(over 120,000) replace the tensioner and idler pulleys also.