start up noise on 1.9 CDTI 150

[gnomes]

Wondering whether anyone can help. On start up I get a noise to the right handside of the car that can only be described as chewbacca yawning for about 4 seconds then it disappears, if you stand outside the car you can hear a belt/tensioner going around until the car is warm. Its booked into the dealers next week, but me being me i'd like to know what it is

[plasma]

V tensioner belt/idlers or waterpump is my guess.

[benny]

the altonator belts are prone to beeing **** ...there is a feild remedy on them as long a it is warantee

[gnomes]

had the alternator tensioner and a new belt fitted last week, so its becoming a mystery

[plasma]

thus my option still stands. Had this problem. They tried the belt first, then moved on to the V tensioner/idlers before tracking it down to the water pump

[gnomes]

cheers. Good job its still under warranty!