Quote:
Originally Posted by jt20
unlikely that you have that much water and oxygen in that spot during operation if your engine runs decently.
I have noticed this numerous time. The rust comes from between the threads of the delivery valve holder.
when you remove it, you break it all up into finer particles and it falls into that region around the delivery valve.
It is important to flush it out.
take a look at the threads of the holder and the female threads in the pump, you wil traces of rust there.
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Alright. This did catch me off-guard, because the engine ran o.k. Under powered, but no excessive shaking. I will address the surface rust on the line nuts. The rusty delivery valve diesel nut was the hardest to unscrew, and it doesn't take much to toque them in the first place. Thanks for your reply.