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Talking with an old fleet mechanic changed how I look at injectors
I was swapping out an injector on a 6.7 Cummins last week and this older guy who used to work for a fleet of delivery trucks stopped by to chat. He told me he never bothers with the fancy electronic testers for common rail stuff, he just listens to the return line flow with a stethoscope. At first I thought he was full of it, but he showed me how he does it on a spare engine and honestly the sound difference was pretty clear between a good injector and a bad one. It hit me that sometimes we overthink this stuff with expensive tools when a simple trick from experience works just as good. I tried it on my truck the next day and saved myself a trip to the shop for a diagnostic. Has anyone else run into an older mechanic with a trick that seemed too simple but actually worked?
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jade_hunt489d ago
I tried the stethoscope trick on my 4-cylinder once and spent an hour convincing myself three injectors were bad before I realized I was listening to the alternator.
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