Technical 79 spider lower pulley bolt size

[Slotman]

Good evening everyone! Would anyone know the size of the bolt holding the lower pulley for the belt on to the crank ?
I can't get a good look at it from the top or the bottom I can only feel it...it feels huge and much bigger than an inch..thanks in advance for any replys! I've got to find where I put my manual 10 years ago!
Terry

 

[gengis]

Going on memory here...I think it is 38mm.

 

[Slotman]

Sounds about right...thank you!!

 

[s130]

On the 1998cc 130TC engine the crankshaft pulley bolt is M20 x 1.5 *and* Left Hand Tread!

Also it is traditional to mark left hand threaded bolts/nuts with notches on the drive surface apexes. This was not done on our 130TC so caused me some real frustration.

You will need to/should check the tread direction.

Also would add the M20 x 1.5 is the thread. The blot head is probably 38mm socket size as noted above.

 

[Slotman]

Thank you S130!