Fuel filters changed (4LW)

[jenevers]

I was surprised that I didn’t have to bleed the fuel supply to the injectors, after changing the filters. Where did the air go? ?

[jonesthenuke]

It should go down the bleed off line from the filter on the engine, back to the tank.

[jenevers]

Just now, jonesthenuke said:

It should go down the bleed off line from the filter on the engine, back to the tank.

It must have done.

[Tony Brooks]

If you bled the filter or the filter and low pressure side of the injector pump then you removed what air was in there before it got into the high pressure part.

[jenevers]

23 hours ago, Tony Brooks said:

If you bled the filter or the filter and low pressure side of the injector pump then you removed what air was in there before it got into the high pressure part.

I didn’t bleed anything. I just changed both filters.

[matty40s]

Ah, you will probably discover the air half an hour into your next cruise...

[jenevers]

5 hours ago, matty40s said:

Ah, you will probably discover the air half an hour into your next cruise...

That’s what I’m worried about....just as I’m entering a lock?

[Tony Brooks]

If the filter head has a decent connection to the leak back pipe and especially if you filled the filter with fuel as someone said much earlier in the topic it probably self bled back into the tank.

[jenevers]

3 minutes ago, Tony Brooks said:

If the filter head has a decent connection to the leak back pipe and especially if you filled the filter with fuel as someone said much earlier in the topic it probably self bled back into the tank.

You can’t fill the filters cos they’re horizontal on a 4LW.

[jenevers]

Well I’ve run the engine for over 2 hours now and no problems with an air lock. 
Just in case, which nut in the fuel line, on the fuel pump, is best to slacken off to let any air escape?