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no you do not have to change the timing chain when changing the water pump.
It is not necessary to change timing gears when changing a timing chain unless they have become worn. You won't know if this is the case until you get the cover off and inspect them. It is necessary to change any chain tensioners when you change your timing chain.
Changing a timing belt is very complex with hundreds of details. Directions for changing the timing belt can be obtained when you purchase the timing belt.
yes you have to change the pan gasket when doing the timing chain
You should change the timing belt on a 2003 when it wears out or breaks. Changing the belt beforehand is not needed.
You do not have to, but if the water pump is timing belt driven it is highly recommended.
There are two standard threshold conditions for changing the timing belt (1) age of the belt - 10 years or more or (2) useage of the belt in terms of miles ~ 90k if under 10 years.
No belt it is a chain - no changing needed
Timing chains are designed to last the lifetime of the engine. It is timing belts that require changing at certain intervals.
From what I read it has a timing chain, not a timing belt. I asked the dealer about scheduled maintenance, and changing the timing belt was never mentioned.
Audi recomends changing timing belt and water pump at 110k miles.
Steps to changing the timing belt on a 2005 VW Jetta Wagon 1.9 TDI?