The injectors are being serviced on a Bosch fuel injection system. Technician A says the seals often leak and should be inspected carefully any time the injectors are removed. Technician B says petroleum jelly is generally regarded as the best O-ring installation lubricant. Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Technician A is correct because seals in fuel injection systems, including those on Bosch systems, can indeed leak and should be inspected whenever injectors are removed to prevent fuel leaks and potential engine damage. Technician B is incorrect because petroleum jelly should not be used on O-rings in fuel systems as it can degrade the rubber. A lubricant compatible with the O-ring material and the fuel should be used instead.

The Injectors Are Being Serviced on a Bosch Fuel Injection