Idler bolts (V6) - Alfa Romeo Forum
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(Post Link) post #1 of 6 Old 26-12-11 Thread Starter
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Idler bolts (V6)

I need to source some new idler bolts for my 166, as the orignal ones have been rounded.
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I take it you mean the cambelt idler bolts? I needed those too, and visited 4 different shops specializing in nuts and bolts and none of them had the correct bolts. If I remember correctly the thread is a bit finer than regular bolts (0.75/1mm rise?), and the shortest off-the-shelf bolts with the same thread were 20 cm long and correct length ones had a prohibitingly long leadtime.

In the end I visited a local metal shop which made up 2 bolts with the correct threads from blanks. Took 10th minutes and was for free.

I hope you have better luck sourcing ones where you live.
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(Post Link) post #3 of 6 Old 27-12-11 Thread Starter
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Yeah, it is the cambelt idler bolts. Tried to get them matched locally, they said it would be main dealer
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Are they really a finer pitch? Main Dealer isn't a bad place to start, if they're properly weird thread size.


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I just measured as i have the old drilled out bolts lying around in the garage (man, i really need to get rid of old unusable crap more often). They are m10 with 1.25 mm pitch, and regular m10 are with 1.5mm pitch. Not a proper funny thread size per se as that is standard fine thread m10, but apparently still not common enough.
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(Post Link) post #6 of 6 Old 29-12-11 Thread Starter
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I had my wife phone around for them and Autolusso has them :-)
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