Water Pump Pulley Bolt

1978 308 GTS.

I took the water pump pulley off to change my belts. I was surprised at how easy the bolt came off. Does anyone know the torque? Also is there a trick to this? How do you hold the pulley to tighten it? With the belt? If so that does not seem to be too tight before the belt slips on the pulleys.

Yes, I searched.

Thanks!

 

Bolt? Shouldn't it be a nut?
It's next to impossible to apply the proper torque with the pump on the engine. I grip the pulley in my vise with aluminium jaws to torque down the pulley.
Do not grip it on the opposite side (on the impeller nut)

Best Regards
Martin

 

Yes nut. Any way to do it on the motor? A one know the torque?

 

60 Nm. 12mm nylock nut

 

If you have an old belt you can try to wrap it around the pulley, twist and grip it with a big pipe wrench. Acting on it like those belt oil filter wrenches.

http://www.inox-schrauben.de/images/ged734020.jpg

Best Regards
Martin

 

They came with a standard nut and a cone lock washer.

I have torqued them in place on the motor so it is possible.

 

How did you do it?
It's no standard nut, if standard means regular thread. I just have a pump on my bench and looked once more. It's a metric fine thread M12x1.25

Best
Martin

 

That is standard for a Ferrari.

He said nylock. They did not come that way.

 

I have one of these strap wrenches I will try.

 

How do you torque it in place? Strrap wrench?

 

I just found this!