Oil & Fuel Air Bleed Advice

[Rebol]

OK,

I wish I could say she's back in action but alas this is not the case. I've managed to get it running for about 20 seconds three separate times today. Each time it stops I check the lower vent plug and I see those now familiar bubbles. I'm beginning to think I do have a leak somewhere but there's no sign of that in terms of wet/dampness.

This is what I have been doing:

1. Crack the bolt on the fuel filter and let it bubble till only fuel comes out. On the last couple of times it appeared there were no bubbles which also leads to believe the problem may lie somewhere between there and the injector.
2. Crack the lower vent plug on the injector and bleed.
3. Crack the upper vent plug on the injector and bleed.
4. Crack the "accessible" pressure line on the injector and bleed.
These steps are from the manual, by the way.
5. Crank it till it starts (allowing for cooling down periods).
6. Repeated three times today then it got dark + the battery recharge

I do have these questions though:

* There is a knob where the fuel comes out at the bottom of the tank, I'm pretty sure that's the fuel shutoff valve and I have that loose but not all the way loosened. Is that relevant?

* Is it just possible there really is that much air in the lines that I do have to repeat this process over and over?

* What are your experiences with air bleeding? Have you had to go through so much or am I just lucky?

Thanks for the help. One day...

 

[whistlepig]

OK,

I wish I could say she's back in action but alas this is not the case. I've managed to get it running for about 20 seconds three separate times today. Each time it stops I check the lower vent plug and I see those now familiar bubbles. I'm beginning to think I do have a leak somewhere but there's no sign of that in terms of wet/dampness.

This is what I have been doing:

1. Crack the bolt on the fuel filter and let it bubble till only fuel comes out. On the last couple of times it appeared there were no bubbles which also leads to believe the problem may lie somewhere between there and the injector.
2. Crack the lower vent plug on the injector and bleed.
3. Crack the upper vent plug on the injector and bleed.
4. Crack the "accessible" pressure line on the injector and bleed.
These steps are from the manual, by the way.
5. Crank it till it starts (allowing for cooling down periods).
6. Repeated three times today then it got dark + the battery recharge

I do have these questions though:

* There is a knob where the fuel comes out at the bottom of the tank, I'm pretty sure that's the fuel shutoff valve and I have that loose but not all the way loosened. Is that relevant?

* Is it just possible there really is that much air in the lines that I do have to repeat this process over and over?

* What are your experiences with air bleeding? Have you had to go through so much or am I just lucky?

Thanks for the help. One day...

Once the diesel starts after bleeding it should keep running. It may sputter a bit until all the air is out but once it fires up it should stay running. Repeated bleeding isn't going to help. It could be sucking air into the fuel but it would also be leaking fuel through the same place. Could be that the fuel hole at the bottom of the tank is plugged. You don't have to get every single molecule of air out when bleeding. Just enough to start it. I would give the motor a good cleaning and drying out and then watch for traces of diesel leaking.

 

[Rebol]

Thanks. That's good advice and to the point. I'm now more than sure there is a leak somewhere. I'll start a new thread since I've become somewhat of an expert at air bleeding

 

[whistlepig]

Leaks on the feed from your tank to the injector pump shouldn't be a problem. Leaks from the injector pump to the injectors on the motor (after the fuel is pressurized) are the leaks to be concerned about.

 

[JJ. in B.C.]

I would suspect a hole in the diaphram of the fuel lift pump

 

[banjodunn]

G'day i think you need to pull the fuel tap out of the tank and check the gauze filter that pokes up into the tank also on your lift/ prime pump you should have a removable top that will have/ should have a gauze screen in it check both these for blockage while you are at it give the fuel lines a good blow out esp if it has got banjo fittings anywhere as these sometimes contain
small filters

Jon