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Old 03-11-2010, 13:15   #1
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Yanmar Injector Cleaning

im curious as to the procedure to cleaning the injector in my yanmar 1gm10 is this something that is doable by the owner or is it a specialized procedure. what about fuel injector additives that claim to clean the injector any benefit here or are they not worth touching. thanks
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Old 03-11-2010, 14:18   #2
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We did our injectors this spring. My boyfriend (Brodie) is a mechanic, and we are very DIY. However, the injectors are the only thing we've taken in to be done professionally as Brodie's opinion was that it's too specialized to do ourselves. We have a three cylinder Isuzu from the 70s that we'll do a rebuild on next year. Doing the injectors made a big difference in the vibration issue we were experiencing. Having all three serviced by Fred Holmes Fuel Injectors here in Vancouver (they have another location in Prince George, though I'm sure there's someone locally who can handle them) cost under $300. It was a two day turnaround from drop off to pickup. I talked to their service tech afterwards and he suggested having them done every 1500 hours.
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Old 03-11-2010, 14:35   #3
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Ir just isn't worth it to have Yanmar 1/2/3gm injectors rebuilt. Rebuilt costs about $90 and new are about $120.

But the best thing you can do yourself is to run the engine at 3,400 rpm for an hour or so. That will burn any carbon off of the tips and improve the spray pattern. Try it. If it doesn't improve then replace.

What problem are you trying to fix. A good indication of a bad injector is a diesel sheen on the water right after startup.

David
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Old 03-11-2010, 15:00   #4
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Ir just isn't worth it to have Yanmar 1/2/3gm injectors rebuilt. Rebuilt costs about $90 and new are about $120.
David is that all they cost? I haven't priced them, but if it's that cheap I think replacing them makes sense
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Old 03-11-2010, 15:47   #5
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G'day All,
At that price you only get the injector nozzles not the complete working unit.
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Old 03-11-2010, 16:41   #6
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A point to note, the injection pump is the other end of the fuel system. I had both the injectors cleaned and the pump cleaned/adjusted. The engine ran better than new afterwards.

The shop (Diesel Plus) advised me that diesel will varnish like gas with age. Run the engine 20 minutes a week will help prevent problems from varnishing.
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Old 03-11-2010, 17:39   #7
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A point to note, the injection pump is the other end of the fuel system. I had both the injectors cleaned and the pump cleaned/adjusted. The engine ran better than new afterwards.

The shop (Diesel Plus) advised me that diesel will varnish like gas with age. Run the engine 20 minutes a week will help prevent problems from varnishing.
Did you have problems getting the injector out?
What motor?

I tried everything short of dynamite and can't get my single injector out.
I guess I should take the head off and find a place on land.
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Old 04-11-2010, 06:25   #8
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Did you have problems getting the injector out?
What motor?

I tried everything short of dynamite and can't get my single injector out.
I guess I should take the head off and find a place on land.
I had no problems removing the injectors or injector pump on my 3GM30s. The engines had ~800 hours on 'em at the time. Re-installation of the injector pump requires carefully watching to make sure the governor arm is properly seated on the rack. Also, be sure to use the same timing shims under the pump.
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