I've never understood why so many Twinsparks get destroyed by cam belt failure. Having driven a 146 upto 160,000+ miles and always changed the belt at 72K, I thought it must be due to abuse.
I've now got a 2 year old 156 Twinspark now (imported and probably built 2004) and its done 45,000m now. Now I didn't inspect the belts at 36k as it is all motorway driving and never had any problems with my old 146 ali top Twinspark.
Anyway, just noticed a vibration noise, like loose trim etc, between 2500 -3000rpm. Not sure sure how long its been going on because I probably couldn't hear it with the hexagonal Eagle F1's I just changed! So anyway when I was listening to the noise in the garage it occured to me that may be its the cam belt. So I've taken the covers half off an the belt is not tensioned
So if you hear a noise between 2500 and 3000 rpm don't ignore it.
I now need some advice about how to remove the auxillary belt idler. I can't remeber how I did it on the 146 but I can't find anything to fit; 15mm socket too big, can't see that a ring would do it and anyway I haven't got one so how did I do it on the 146. Have they changed the size? It's a stupid chamfered bolt that nothing seems to fit on properly if there was space.
Just need my new parts to to turn up an some inspiration about the idler pulley.
I'm so glad I played safe and had a look
Any advice appreciated.