What a mess!

[rondds]

Ignoramus question here. Is this something that afflicts only diesel engines? Is it because of fuel pressure being so high in diesel? Is it b/c diesels vibrate more or related to construction of the fuel lines? It seems that this could be a big inconvenience for a diesel owner but catastrophic and deadly for a gas owner.

 

[Robski97]

yes there was a service bulletin last year ...

rob

 

[jitts3]

Ignoramus question here. Is this something that afflicts only diesel engines? Is it because of fuel pressure being so high in diesel? Is it b/c diesels vibrate more or related to construction of the fuel lines? It seems that this could be a big inconvenience for a diesel owner but catastrophic and deadly for a gas owner.

Diesels run higher pressure. My CAT in my truck runs between 75-85 psi. All diesels are injected. Gas engines do carburated and injected.
Diesel fuel in raw liquid form is very hard to ignite. But once in a vapor form (like spraying from a leaking line) much easier to ignite. Diesels use high pressure hose or metal tubing.
Gasoline on a carburated engine runs lower pressure and any fuel hose can handle th pressure. Gas is pumped to the carbs and sucked into the engine. It sprays in due to the air velosity passing the venturi inside the carburator.
Gas fuel injestion the pressures are higher and require FUEL INGECTION hose. Gas is sprayed into the engine by the injectors.
FYI Gas injecter engines spray the fuel into the engine before the intake valve. Diesel in sprayed dirrectly into the clyender at requiered time of detonation.

Oh, somebody couldn't find the line on their boat. The new line is silver, not painted like the engine. The original would have been the color of the engine since when they paint them, they paint it as a whole assemblly

By the pic it looked to me like the injector pump supply line from the fuel filter housing. If that is so it would be a high pressure line about 75 psi or so.

 

[Mr Salt]

We all know that is the direction that the engine manufacturers take ---- wait till it fails. This is because the cost of repairing all engines is too high. Hey maybe the engine will hang together until it is out of warranty. Take a look at the Caterpillar aftercooler failures on the 3196. From the guys in my marina I learned that MAN took similiar actions with some of their engine problems.

I believe that the pressure in a common rail diesel is about 23,000 psi, yes this will penetrate your skin. Be careful around one that has a leak from the injection system.

Mr Salt
2001 540 CPMY
Caterpillar C-12s
Cape May, NJ

 

[sbmar.com]

Festivus,

I think this may be applicable to your issue...About 6 months ago Cummins started seeing a few failures of the CR line from the CR pump to the common rail manifold on some QSC & QSL's (both non-marine and marine) .. A low res copy of the fix is attached ( the forum has it limits on file sizes) ..It's 100% covered under warranty regardless of your particular waranty status, but it also needs to be done right.. It appears you had the issue, but someone did not fix it right..

If you need some "one-on-one", drop me a note off line..


Tony

 

[Converse48]

Festivus,

I think this may be applicable to your issue...About 6 months ago Cummins started seeing a few failures of the CR line from the CR pump to the common rail manifold on some QSC & QSL's (both non-marine and marine) .. A low res copy of the fix is attached ( the forum has it limits on file sizes) ..It's 100% covered under warranty regardless of your particular waranty status, but it also needs to be done right.. It appears you had the issue, but someone did not fix it right..

If you need some "one-on-one", drop me a note off line..


Tony

Thanks for the offer Tony! Since the last posting of this thread, Sea Ray/Cummins (I don't recall which) stepped up and "fixed" the fuel line on both engines. The first one was fixed when the failure occurred, which lead to this thread. Initially, they tried to tell me that they would be happy to fix the second one as soon as it failed. Keep in mind that "failure" in this case means potentially explosive high-pressure diesel spraying all over the bilge. Lovely.

Ultimately, and with some pressure from a well-connected member of this very board, they saw the error in their thinking and fixed the other one before it failed. I believe that this led to a recall.

Mine were both fixed using that same bracket that is in the attachment you provided.

Thanks for reaching out!

 

[Robski97]

WTF... My guys only changed the line didnt add a bracket. this was done Last august though...( 07 ) Guess i have to call em back . Why dont we get reciepts on warrty work ?

Rob

 

[Stray Cat]

Are those flared connections on the tube? I'm surprised they wouldn't change the fittings to an o-ring face seal so they would adapt to a mating spud and nut on the tube. An ORFS connection would be much better for a vibration application than 37 degree flare.