hi all, just got dropped off by my good mechanic vw nut friend. took my 1.8t in for simple service, oil, filters blah. i've had a bit of a rattle for a few weeks, i thought it was the turbo, so i've been putting it out of my mind(bank account). it turns out its the small hydraulic piston that keeps the tensioner pushed up. (sorry i can't remember the name, maybe idler pully) the seal has gone on the piston, therfore not keeping the belt tight. this was causing the tensioner to rattle at 1200-1400 revs. the belt was literaly hanging by a thread!!!! the belts and pulleys were done 10000 miles ago but not the part thats failed, according to reciepts and service log. i'm no mechanic, but was mightily relived when the source of the rattle was found. i was just wondering if this is a common thing with 1.8t mk 4? also should i get the water pump renewed whilst i,ve got the thing in pieces and me cheque book open? ta
