Engine Locknuts:Nylon or Spring Washers on 1973 Engine!?

[onyxco]

I am in the process of restoring a 1973 1/2 911 and putting my ENGINE parts and hardware together.
Q: Did nylon lock nuts exist in 1973 and if so, were they used on this year 911
or
Was it a standard nut with spring washers as it seems the parts diagrams depict?

Thanks All!

[RWebb]

Ny-locks will work a LOT better than a standard nut with spring washers unless they are in a very hot area.

Or are you nuts about concours?

[onyxco]

I totally agree... I am not going to show the car but am doing a restoration just on this side of perfect so,, I want to try to stay with original.

Originally Posted by RWebb

Ny-locks will work a LOT better than a standard nut with spring washers unless they are in a very hot area.

Or are you nuts about concours?

[Porboynz]

I remember that the gearbox nuts on my 1972 915 where like nylocs but are all metal with a sort of crimping section where the nylon is. I replaced them with nylocs, but kept regular nuts and lock washers on the engine fasteners. Maybe use both?

[mreid]

Nylocks were not used on your year, but are much better than lock washers and the old style deformed steel lock nuts (except in high heat applications). I would use nylocks for the intake manifold and other areas where a loose nut could create a vacuum or fuel leak.