Originally Posted by
sydVR6
You'll know if the chains need doing, because they become noisy. Kind of sounds like ball bearings rolling around in a milo tin.
The 'paranoia' about chains on cars which have hit 160,000km is that on occasion the chain guides / tensioners have been known to fail prematurely.
VW don't list a service interval on the chains because they're supossed to last 'the life of the car', but if the car has done 160,000km, it's prudent to have the tensioners done (like on a rubber timing-belt car) and while you're at it, the chains too.
Anyway, the upper chain is relatively easy but the lower chain requires removal of the transmission from the motor. It sometimes ends up costing more just because it's so easy to say "while the tranny is out I might as well do xyz" - fill in the blanks. Parts are relatively cheap; it's the labor that may frighten some:
In all, changing the chain and guides end up being about 8 or 9 hours labour on the job cards I've seen - this is why some people will try and discourage you. You could always use this to help you negotiate a better price -he's asking good money for that car.
You might look at it this way: Most cars have timing belts with ~ 100k service intervals these days, and usually cost about $800 'retail' to replace along with guides, water pump, etc. The VW timing chain system has almost double that service life, is a little more costly to renew due to labor, but then you're covered for another ~ 160,000km or so.
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