AC Owners Club Forum

AC Owners Club Forum => AC Weller Engine => Topic started by: AEX146 on May 28, 2026, 09:47:36

Title: Crankshaft nut size
Post by: AEX146 on May 28, 2026, 09:47:36
Does anyone know the size of the crankshaft pulley nut on a CL engine?
It's bigger than anything I've got in my toolbox and must be something like 1" Whitworth.

Regards,
Ben Morgan
Title: Re: Crankshaft nut size
Post by: B.P.Bird on June 02, 2026, 18:08:03
Ben,
The 1" Whitworth is a pretty meaty spanner and expensive. I use this in situ for timing and valve clearance setting. I think the full size spanner would be hard to use in the engine bay. In addition this smaller fabrication seems to be good enough to tighten the damper carrier and v belt pulley nut, with some small encouragement from a copper mallet, as well as for turning the crank over

(https://i.postimg.cc/ZYdKj3kM/Crankshaft-Damper-Carrier-Nut-Spanner.jpg)

Barrie
Title: Re: Crankshaft nut size
Post by: AEX146 on June 08, 2026, 09:58:12
Dear Barrie,
Thank you for your reply and the photo of this very useful tool. I will have to get something similar made up.
Regards,
Ben