Fuel pump

A fuel pump is a part of Transformer anatomy, analogous to a human heart. It pumps fuel.

Fiction

Marvel The Transformers comics

Blaster, reminiscing about Scrounge, said that his friend wasn't much of a warrior, but had a "fuel pump as big as a planet". Crater Critters

Island of Fear

Beachcomber explained to you that Dirge's engines had the power to instrill fear into the fuel pumps of Transformers and humans alike. You pointed out that humans have hearts, not fuel pumps. Beachcomber retorted that the two are very similar. Island of Fear

IDW Generation 1 continuity

Upon awakening on the planet Clemency, Fulcrum was a little put out to find that Misfire had already salvaged his fuel pump. Misfire later graciously returned the organ. Rules of Disengagement