Some would consider the engine the heart, but the engine is the machine, the closest analogy to the heart is a fuel pump (or maybe Oil pump), but in this case I replaced the fuel pump on my 1977 Volkswagen type II, westafalia camper.

This thing was the factory original, you can tell by the clamps.  That's a pretty good run for a factory fuel pump if you ask me.

Hopefully this will solve the mystery fuel inject cut-out i've been experiencing.

The original fuel pump pictures are below, notice the white material on the outside, is this some type of asbestos ring ?  Not sure, but the new pump wouldn't tighten up with the clamp, whatever that white ring is, it was under the ring / clamp that holds the fuel pump on to the vehicle, without it there is too much play.  Not sure what to use to replace this, so currently I just cut a peice of fuel line, lengthwise and put that under the clamp to bring it in tight.