3406b fuel line leak at head?

Chevyho · May 9, 2018

Thanks for all the help

Cat 3406 · Nov 23, 2019

Having the same problem on the #1 injector right behind the air compressor, its hard to see where the leak is dripping from. I took it apart and used air pressure and water to check if pipe is leaking and it was fine so i reattached the pipe and it still leaks. Is there anywhere else on the injector that could be leaking the deisel onto outside of the block?

wore out · Nov 23, 2019

Cat 3406 said: ↑

Having the same problem on the #1 injector right behind the air compressor, its hard to see where the leak is dripping from. I took it apart and used air pressure and water to check if pipe is leaking and it was fine so i reattached the pipe and it still leaks. Is there anywhere else on the injector that could be leaking the deisel onto outside of the block?
Click to expand...

Pass thru connection has an oring on the line that hooks to back of it....if it drips from under the lock plate with the stud in it that's your problem

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