156 pepperpot bolt - Alfa Romeo Forum
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(Post Link) post #1 of 9 Old 01-08-16 Thread Starter
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156 pepperpot bolt

Does anybody know which is the right bolt size for pepperpots? I bought secondhand wheels, and apparently my current bolts are too short for them (48mm)

I really can't understand the problem as the new wheels are from the same year as my current ones...
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(Post Link) post #2 of 9 Old 01-08-16 Thread Starter
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And the year was 2003. Alfa 156 is model, I assume for both.
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Std 156/147 bolts are M12x1.25 thread 23mm long with taper seat.
The 23mm is measured from the tip to start of taper.
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(Post Link) post #5 of 9 Old 05-08-16 Thread Starter
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I'll have to measure those bolts (full length was, if I recall correctly, 48mm). I already got new ones, 5mm longer.

Has Alfa changed the wheel bolt length as my original bolts didn't fit with my new wheels?
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Quote:
Originally Posted by jaska121 View Post
I'll have to measure those bolts (full length was, if I recall correctly, 48mm). I already got new ones, 5mm longer.

Has Alfa changed the wheel bolt length as my original bolts didn't fit with my new wheels?
No point measuring the full length, having a taller head increases that measurement but not the length of the bit that matters.

As for length changes: no.
Only a change from 19mm head to 17mm.

But if you've purchased 53mm bolts (tip to taper) they will be far too long. Nobody will be measuring wheel bolts by their overall length.!
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Quote:
Originally Posted by David C View Post
No point measuring the full length, having a taller head increases that measurement but not the length of the bit that matters.
.......
yep, from alfisti.net :
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Oh, I see. I'll have to check those lengths... But the 5mm I said meant 5mm more taper, just what I (or the rim) needed.
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Quote:
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Oh, I see. I'll have to check those lengths... But the 5mm I said meant 5mm more taper, just what I (or the rim) needed.
The taper length is the same on all Alfa bolts for alloy wheels.
They had a shorter taper (same angle) on the bolts for steel wheels to make them shallower for the plastic cover.
Fiat however used that short taper on alloys too.

So, it is still the shank length that matters, not the taper length.
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