Rebuild of high pressure fuel pump for Yanmar 3GM30F

[skunther]

I had my high pressure fuel pump checked out as there was a small leak coming from it, and the shop came back with the following:

• Pitted delivery valves
• Scored plunger

Likely causes are water in the fuel system at some point in the past.

The cost for a rebuild is $1187 before tax.

Does anyone have experience with this? Does this sound reasonable and right? Is a rebuild likely to improve performance and necessary?

 

[Terry Cox]

Define small leak. If just a slight weep and the engine runs okay, then let it go for awhile. I have no experience with rebuilding these machines. Take the time to check around and get some more opinions, but if you do, the shop rightly so may charge you a diagnosis fee.

 

[Mark Maulden]

Who did your diagnosis?

 

[Alan Gomes]

The cost for a rebuild is $1187 before tax.

Sounds insanely high. What does a new pump cost?

 

[skunther]

Who did your diagnosis?

Not sure. I’m working with Tri County Diesel, who sent the pump to a shop somewhere in town here in Bellingham WA. I’ve found Tri County to be pretty honest and good.

 

[skunther]

Sounds insanely high. What does a new pump cost?

Agreed. The tech told me new pumps are no longer available, but cost over $2k when they were.

 

[Alan Gomes]

Agreed. The tech told me new pumps are no longer available, but cost over $2k when they were.

Based on what I just turned up on this page, if I'm reading it right, that sounds correct! But just looking at this page, it does appear that you can get one--if you're willing to pay that much.

 

[skunther]

Based on what I just turned up on this page, if I'm reading it right, that sounds correct! But just looking at this page, it does appear that you can get one--if you're willing to pay that much.

Thanks for that! Looks in line with what Tri County said. Even with that, I was surprised at the rebuild cost.

 

[Mark Maulden]

Take it to Northland Diesel. Just off Bakerview..

 

[skunther]

Take it to Northland Diesel. Just off Bakerview..

Yup, they quoted $1k as well. Seems that’s just what it is. BOAT.

 

[Mark Maulden]

Just for grins, you could call Seattle Injector..

 

[jssailem]

The guys at Seattle Injector did my work. Great guys. Stand behind their work. Decent turn around.

 

[skunther]

I already pulled the trigger, but called Seattle Injector just to see. They said $450-$550, 3 week turnaround.
Next time, but hope there’s not a next time.

 

[jssailem]

I thought that might be the situation. Which I had gotten the info to you sooner. They were excellent in my situation.

 

[skunther]

I thought that might be the situation. Which I had gotten the info to you sooner. They were excellent in my situation.

I appreciate that.

 

[skunther]

Update: apparently there is also significant scoring on the nozzle pins of two of the three injectors in addition to the pump issues. I spoke with the shop performing the rebuild (Northland Diesel), and they said there was no water damage as there would have been rust. They said it was just wear. Seems maybe something was lost in translation in the first diagnosis I received stating water damage. Regardless, they told me to add a lubricity additive to the fuel such as Stanadyne or Amzoil. I’ve been using Diesel Kleen, which states it increases lubricity. Northland was unfamiliar with the product though. Anyone have any input on what might help minimize wear on the fuel components? Is Diesel Kleen adequate (I’ve owned the boat for 350 hours, and have added Diesel Kleen at every fill), or should I be adding something to the cocktail?

 

[Tally Ho]

How many hours on your engine?

Greg

 

[skunther]

2595

 

[Alan Gomes]

Update: apparently there is also significant scoring on the nozzle pins of two of the three injectors in addition to the pump issues. I spoke with the shop performing the rebuild (Northland Diesel), and they said there was no water damage as there would have been rust. They said it was just wear. Seems maybe something was lost in translation in the first diagnosis I received stating water damage. Regardless, they told me to add a lubricity additive to the fuel such as Stanadyne or Amzoil. I’ve been using Diesel Kleen, which states it increases lubricity. Northland was unfamiliar with the product though. Anyone have any input on what might help minimize wear on the fuel components? Is Diesel Kleen adequate (I’ve owned the boat for 350 hours, and have added Diesel Kleen at every fill), or should I be adding something to the cocktail?

Stanadyne has a very good reputation, FWIW.

 

[Tally Ho]

2595

Not THAT many hours, my old 2GM20F has over 2000 hours.

I hope you can get it sorted out (at a reasonable cost).

Greg