Collect a spark plug from the Scrap Golem Disassembler.
When it is almost dead, it will become immune to attacks and slowly start to self-heal, and the three smaller golems around it will come alive. They must be destroyed before you can click the Scrap Golem Disassembler for the update. If you use too long time destroying these smaller golems you have to rekill the Scrap Golem, but this time no smaller golems will come to the aid.
Collect a carburator from the Scrap Golem Welder.
Same thing will happen here as on the first Golem.
Collect a crankshaft from the Scrap Golem Incinerator.
Same thing will happen here as on the two first Golems.
Collect a starter motor from the Noisy Scrap Golem.
Same thing will happen here as on the three first Golems.
Put the parts in the box near Edgar before they assemble. (2 minutes)