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My Passat 1.8 20V (ADR) has shed the teeth on the cambelt. I am trying to put on a new cambelt in order to do a compression test to see if any valves are bent. I cannot shift the 4 6mm hex bolts that hold the vibration damper/auxillary drive belt pulley to the crankshaft front plate. I don't want to give them too much welly in case I sheer them or round off the hex. Are there any tips or advice as to what to do, and if I do round or sheer one off what do I do next???
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These bolts have to be tight to avoid shedding the pulley!
I use a new 6mm hex. socket driver, of good quality , to avoid slippage. If the hex sockets are worn, it can be possible to drive in a 1/4" hex. socket driver.
With a well fitting hex tool you should be able to apply enough torque to undo these bolts. I doubt very much that the heads will shear off. Note that on my Mk IV 1.9 PD Tdi the workshop manual says renew these bolts when re-fitting the pulley.
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I'm using a 6mm hex drive on a 1/4" socket drive. It's not man enough for the job, as I can't get enough torque on it. What size drive are you using? I can try to get a 6mm on a 1/2" drive (my tools and torque wrench are all 1/2"). If not I guess I could buy a 3/8" adapter. My only concern on this was that the bolts are recessed and I thought a larger socket might foul on the inside of the pulley. I have'nt seen any 'longer bit' 6mm Hex with 1/2" drive, but then I live in Basingstoke which is devoid of good tool shops
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Purely out of interest, was the cambelt within the "change limit", or had it gone of the mileage specified?
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The cambelt stripped a row of teeth at 70K miles, just before I was about to change it anyway at that service. The original service book stated to change at 80K, but I have mine serviced at an independant. They recommended changing at 50K, which I foolishly ignored, thinking VW might know what they were taliking about. When I went back to VW they said that they had changed the recommended interval to 60K and if I had it serviced with them I would have known this....so no comeback really
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I had to drill the head off one crankshaft damper pulley bolt the last time I changed my AGG cambelt. I was surprised how soft the bolt was and I was luckly that I could unscrew the remaining part by hand.
I now use old inner CV bolts instead of the correct ones.
Best of luck
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That's bad luck bk.bas, I don't know why DVLA can't contact owners of ALL affected cars, rather than those who can afford to go to dealerships being the only ones in the know.
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Luck doesn't have much to do with it.... I understand that many 1.8 VW/Audi's suffered from premature cam belt failure before VAG unofficially aknowledged there might be a problem and changed the recommended replacement from 80 to 60K. The VW garage wanted £1800 just to look at mine....I'm now doing all servicing myself, and when I change this Passat it certainly won't be for another VAG car....Volkswagen reliability & good customer service...NOT
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