Originally Posted by rbtoj

So I have been fixing my 1978 280slc fuel system for a while now, chasing a rich mixture problem.
I have now turned my attention to the warm up regulator and determined that it cannot provide the correct pressure to the system (wur pressure is too low, explaining the rich mixture).
Since I never saw any pictures on the web of the lower part of the WUR (and I heve the damn thing apart now), I'd thought I'd share some.

If any one needs to change that green-ish gasket, it looks to be totally doable.
The material feels like a very soft rubber, like latex (I know it isn't latex). I imagine it should be easy to find some gasket material similar to that.
The metal part in the middle is screwed in place with a 4mm allen.
And that's pretty much it. Noting else there...
Come to think of it, that's probably why I never saw any pictures of it posted online...

BTW, the model number on this WUR is 0438140057.

Cheers.