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Murphy's Law has a funny way of taxing your wallet. If you put off the timing belt change, you set yourself up for a complete engine failure, which will most likely happen when it is raining and you're driving down a major highway, or when you are just about to go on a date. Either way, you are severely inconvenienced. You could change the belt now and turn your back on the possibility of paying for a tow truck if you neglect the belt.
Check the tensioner by spinning it after the belt is off. Look and listen. If there is a lot of play in the spinning action, consider a replacement. If the tensioner exhibits a distinct oscillating sound while spinning, there could be a worn bearing, which would also qualify for replacement. Leave the water pump alone for now.
Note the rubber plug on the plastic timing belt cover. After driving about 500 miles, pull off the plug, loosen the tensioner nut (one turn is fine), crank the engine one revolution, then retighten the tensioner. Consult the 700/900 FAQ or your Bentley for the torque specifics (and don't try this without consulting those resources!). Don't forget to put the rubber plug back when done.
kourt
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