The driver's door strap was making a very loud crack noise on opening so I replaced the failing rivets with bolts as described earlier in this thread.
This seemed to however make the noise even louder!
Removing and re-inspecting the mechanism I noticed that the nylon roller on the fixed side was worn to a flat spot. This was causing the strap to be very loose. In comparison, the roller on the sprung side was hardly worn.
I removed the bolts I had installed instead of the rivets to dismantle the bracket from the mechanism and drove out the pin holding the nylon roller:
The picture clearly shows how the roller has been worn. It also shows that the strap lines up with the lower end of the roller when fitted to the door and effectively only touches half of it. Only half of the roller is worn, the other half is untouched.
I reassembled the check strap with the roller reversed so the worn side was now on the top:
The picture shows how the strap only runs through the bottom half of the two rollers when fitted to the door.
With the roller reversed, the door now opens and closes silently and smoothly!
The rollers also now rotate when the door moves. The strap itself as well as the mechanism had been previously covered in excessive quantities of grey grease as well as being sprayed with white grease. I cleaned most of the grease off the strap and the outside of the rollers before reassembly. I would have thought that as the rollers are meant to roll over the strap as it is inserted and withdrawn, the strap itself therefore should not be lubricated as that could cause the it to slide past stationary rollers rather than rotate them and cause the flat spot as I have.
Does anyone know of the correct lubrication procedure for the door check straps? I have 3 A2s and all have had white grease sprayed previously into the gap on the side of the door cards (and over the door cards!) and therefore over the strap and the outside of the rollers.
regards
Andrew
Does