Originally Posted by Hoygaard
Hehe, putting it into perspective, I guess when I say "not uncommon" I should state that only the owners who have had the problem have reported it but enough have mentioned it to make it worth something to consider.
The 166 engine mechanicals are the same as the 164 (unless someone knows something I do not) and the design of the cambelt system is somewhat flawed or at least the way the belt goes round on of the pulleys on the rear head is not ideal. This has caused lots of discussion in/on the 164 community across the world as many owners have reported checking timing 5-10k miles after a belt change to find the belt had sliped 1-2 teeth. In some cases the owner did not even know there was a problem until they checked but some reported the engine not running quite right and/or a slightly lumpy idle but otherwise seemed fine.
I phoned my dealer to ask if I needed to have mine checked and they told me that it did not need to be checked and it would last 72k miles with no problem so I asked them why there were several mentions of a Technical Sevice Bulletin in Alfa's own documentation stating that belts ideally should be changed at 32k miles but they told me this was wrong.... one thing I have learned is not to expect dealers to have anyone working for them who is really really familiar with "rare" problems.
I have learned that the experiences of many 164 owners across the world are something to take on board as they have saved me lots of grief and money although I do concede to not having my belt checked yet (which might explain why by idle is a bit wierd LOL).
My suggestion is purely based on the advice and experiences I have noted in the last few years of being an active poster on the 164 digest. Just something to think about rather than something to worry about, knowledge is power.
Saying all that, the 166 24v mechanicals may be different than the 164 24v