Fuel Coolers on Comman Rail Engines

Are fuel cooling devices necessarily required on common rail engines??

Quote from a friend;
"I had serious fuel overheating problems to the extent that all 4 of my Racors melted! Had a diesel mechanic knowledgeable about common rail fix the system in Key West - he said he had never seen a common rail without fuel coolers on the return nor fuel pumps on the input side of Racors."

 

As your friend noticed the block adds to the heat of being compressed to 20,000 - 30,000 psi or more, and coolers are required.

The large class 8 trucks ("18" wheelers) with similar electronic controlled engines now install air removers as the fuel gets very agitated as it travels the engine and returns to the fuel tank.FF