I have a 2000 Toyota Avalon with 84000 miles. It

It is a precautionary act, water pump and tensioner should be replaced for peace of mind. The xost of replacing a water pump will be higher if it has to be changed at another time, a new belt
might have to be fitted too. Best to get it all done in one go is the current wisdom

REMOVAL1.DRAIN ENGINE COOLANT 2.REMOVE TIMING BELT 3.REMOVE CAMSHAFT TIMING PULLEYS 4.REMOVE NO.2 IDLER PULLEY 5.REMOVE NO.3 TIMING BELT COVER 6.REMOVE WATER PUMPRemove the 4 bolts, 2 nuts, water pump and gasket.

DUE TO THE AGE OF CAR, TIMING BELT WOULD BE A GOOD IDEA, YOU DO NOT HAVE TO REPLACE WATER PUMP, BUT IT WOULD BE A GOOD IDEA..GAS AND OIL HAVE NO EFFECT ON TIMING BELT OR WATER PUMP.....

check to see if your oil filter is tight

It depends on which type of motor you have; if it is an interference motor, it should be changed every 60,000 to 70,000 miles. You can write down your vin # and call the dealer to find out. You may also consider changing the water pump if it's driven by the timing belt, as the belt has to be removed for the changeover.

Major service & timing belt.

if it aint been done yet TODAY.....I STRONGLY REC belt changes at 60/70k,if it goes, your lookin at a mortgage to get it fixed.

Typically any timing belt replacement interval is 60k-75k miles. The book will however tell you 90k. Now it depends on what engine your Avalon came with. The 3.0 is a non interference engine meaning if it does snap, it will not cause any damage to your engine. The 3.5L engine however i dont know if its a interference engine or not but i dont see anywhere where it says it is. As always suggested, change your water pump as well, as it runs off the timing belt. Once i didnt change the water pump and a week later it locked up on me and ruined my perfect new timing belt. Truth be told :) lol

Most timing belts last from 70000 to 120000 miles, so I really don't think you need to worry about a timing belt. If the car starts right up and doesn't hesitate or bog down when running, then the fuel pump is good as well. The only things that would require replacement at this mileage are the air filter and the inline fuel filter. Sounds like someone is out to make a fast buck or two off you.

4 hours labor at the going rate for your area; 50 dollars for the timing belt, $150-195 for the pump and coolant