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  #1  
Old 06-18-2016, 11:36 PM
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Angry Rusty fuel in delivery valve om602 2.5 N/A

Hello,

I have been pulling injectors and replacing nozzles on my OM602. I noticed corrosion buildup inside of some of the injector delivery grooves. The delivery valve #2has orange fuel in it when I pulled the line off. Do I have water in the pump? The pump leaks oil. Thats for sure. It drips after every time I park. Diesel purge was done beforehand with two bottles. And filters were changed. Any know-how? I am tempted to pull the pump and reseal it before new nozzles get to run in the block. I appreciate anyone sharing their experience on this topic.
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Old 06-18-2016, 11:44 PM
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Rust can only come from water or moisture, you pretty well answered your own question. At a minimum you should drain some fuel out of the tank (water settles to the bottom) and replace your secondary (canister) fuel filter since water will collect in it.
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Old 06-18-2016, 11:52 PM
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Quote:
Originally Posted by Diseasel300 View Post
Rust can only come from water or moisture, you pretty well answered your own question. At a minimum you should drain some fuel out of the tank (water settles to the bottom) and replace your secondary (canister) fuel filter since water will collect in it.
Thanks. It only makes sense. I have a spare tank. Ill be swapping that then as well. Gosh gotta keep on fixing stuff. It'll be worth it....I trust MB.
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Old 06-18-2016, 11:55 PM
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But how the heck will the water get in there? I'd like to find and fix the root cause.
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Old 06-19-2016, 01:04 AM
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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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Old 06-19-2016, 10:12 AM
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Quote:
Originally Posted by jt20 View Post
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.

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.
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