Finally found and fixed fuel leak on Vetus M3.10 - SailNet Community

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Diesel This is a forum dedicated to diesel engines and their applicable accessories.


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  • 2 Post By jameswilson29
  • 1 Post By Dog Ship
  • 1 Post By leogallant
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Old 05-05-2013
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Smile Finally found and fixed fuel leak on Vetus M3.10

I have been plagued by a slow diesel fuel leak on my Vetus M3.10. When the engine was run for hours, a small amount of diesel fuel would accumulate in the fiberglass drip pan beneath the engine. There was also a slight odor of diesel, which I thought might be normal. I was never able to determine exactly where it was leaking and just figured it was old engine disease.

Yesterday, after replacing the secondary fuel filter and the water pump impeller, I was examining the engine and the fuel filter for leaks with a powerful flashlight when I finally notice a slow drip coming from the fuel injection pipe fitting to the third cylinder on the engine.

I had to remove two parts, the air intake and an electrical box brace, in order to reach and tighten the nut on the nipple connecting the fuel injector pipe to the cylinder. Access was difficult, which is probably why the prior owners' mechanics simply hand tightened it or failed to find the subsequent leak. I also had to turn the battery switch off and operate without the engine compartment light because of the danger of an electrical arc on the electrical box brace (don't ask me how I discovered this.)

The repair sidetracking me from all my other planned boat work, and took me about 2 hours just to perform that simple repair, but there is now no more dripping fuel after I tightened it.

Hallelujah!
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Last edited by jameswilson29; 05-05-2013 at 08:08 AM.
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Old 05-05-2013
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Re: Finally found and fixed fuel leak on Vetus M3.10

I too always find great satisfaction in finding a problem and repairing it myself. Even though it is not fixed any better than a mechanic is capable of, it feels like it is.
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Finally found and fixed fuel leak on Vetus M3.10

Nicely done! Good lesson in not giving up and how the longer we look at something, the more we see.

I've got the same engine, and I remember the first time looking at it and everything seemed a blur. Every time we work on it, we begin to see all those little things more clearly and for sure, it's a great feeling to resolve those nagging issues!
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