Which of the following best explains why some OEMs state that the high pressure pipes used on CR systems should not be re-used?
A) the line nut hex is easily rounded out
B) the engine warranty will voided
C) it is more profitable to the OEM to sell as many parts as possible
D) the seats deform to seal when initially torqued

Question

Quizplus · Accepted Answer

The seats in high-pressure pipes used in Common Rail (CR) systems deform to create a seal when they are initially torqued. This deformation is designed to ensure a perfect seal under high pressure. If these pipes are removed and then reused, the seal may not be as effective because the deformation has already occurred, potentially leading to leaks or other failures. This is why OEMs recommend against reusing these pipes.

Which of the Following Best Explains Why Some OEMs State