Recycling Spark Plugs

The center electrode of the plug could be made from numerous different metals but you would need a lot of plugs to make it worth your wild. To get it out, just smash the ceramic surrounding it.

Glow plugs have a solid platinum helical wire filament recessed into the plugs tip. Typically they are used in very small combustion engines such as you find in model cars, airplanes and similar stuff. The ignition is accomplished by a combination of heating from compression and heating from the glow plug.
Glowplugs are also used in diesel engines -i found this out when i wondered why it was so ****ed expensive to replace them!

They aren't used in typical petrol/gas engines as they work through spark ignition and not compression combustion.

Older diesels will not have them. I believe the glow plug in a diesel concept came about in the later 70's.

As far as spark plugs go, mine get stuffed in a junk car body.

Newer diesels have grid heaters instead. They seem to work better too.

Yep, didn't think of that....too rich for my blood