Hello,

I don't have a manual for the girlfriend's '78 240D.

We pulled the vacuum pump, cleaned it, replaced the ball bearing with Nachi bearings from Japan.

I put new diaphragm in with the convex shape pointing up or forward towards the radiator.

I put blue Locktight on the diaphragm bolt and tightened it. Now there is no movement in the diaphragm when I compress the spring. Is the bolt supposed to not be tightened all the way down? What is the torque supposed to be?

I won't be the hero until we get it back on the car.

Thanks,
from the girlfriend and me...