Bleeding 1gm

[jfschena]

Bled the fuel lines per my yanmar course. The bleed screws at the second fuel filter and high pressure pump bled normally. However, I couldn't get any fuel to bleed from the injector nut.

I cranked several times with no fuel.

The engine did start and runs fine. My questions are: 1, has anyone else seen this; and 2, is this and indication of the fuel line being corroded or otherwise gunked up as it enters the injector.

It's 30 years old could be original equipment.

Should I pull my injector?

What say you?

 

[Herrick18911]

The first question that pops into my mind is: do you really have a problem here? You say that the engine runs fine so there is no air in the lines and they are not gunked up. Otherwise you would have immediate operability problems. So, if it's not broke; don't...

 

[rufus1138]

+1, if it makes you feel better go to autozone and get some rxp gas kicker, pour about 1 bottle in there per 3 gallons and run it hard periodically for the following few hours and it will help as well.

 

[Benny17441]

Very much likely original equipment, these engines are hardy and will last a long time. Do not be concerned with the injector until problems develop that point to it. Usually a bleed down to the fuel injector pump will clear enough air to get the engine started. For the 1GM the bleeding for the injector is done by loosening the fitting nut on the injector just enough to expel fuel. You may need to crank the engine with the compression lever on to have fuel expelled from the injector. I would not pull it as the only thing that can be done is an external cleaning and there is the possibility of incurring damage by the removal procedure.

 

[Alan Gomes]

Bled the fuel lines per my yanmar course. The bleed screws at the second fuel filter and high pressure pump bled normally. However, I couldn't get any fuel to bleed from the injector nut.

I cranked several times with no fuel.

The engine did start and runs fine. My questions are: 1, has anyone else seen this; and 2, is this and indication of the fuel line being corroded or otherwise gunked up as it enters the injector.

It's 30 years old could be original equipment.

Should I pull my injector?

What say you?

I also have a 1GM. I have not found it necessary (so far) to bleed the injector nut to get the air out of the system. If it is running normally then you're fine.