High pitch noise coming from Fuel Block

[Sharp]

G'day fellas and gals,

My fuel pressure regulator was leaking for months on my TD5, i finally got around to order a new FPR and O ring kit from Spain.

I have installed the new FPR, pipe O rings and new gasket. When i first went to prime it there was a high pitch noise, like fuel flowing through a small point. I though it was just air being pushed out of the line, so i thought nothing of it and fired here up. She started first crank with no fuss.

I went for a 20 minute drive and noticed a leak from the block After checking all unions and joins i figured it must be the gasket, so i went and got another one, and replaced it.

At this point i thought the noise i heard may be because of the leak, due to it not being able to build up pressure.

After installing the new gasket i still have the same noise

The car runs and starts fine

Any thoughts?

[Sharp]

Here is the sound. Although it sounds like blowing air, the noise is coming from the fuel block i believe.

Could it perhaps be a leaking injector seal, and the regulator is now working?

[Duarte19]

Here is the sound.

Could it perhaps be a leaking injector seal, and the regulator is now working?

worth trying an air bleed cycle, key on press acc peddle 5 times, you will hear the pump run a few times

[Sharp]

worth trying an air bleed cycle, key on press acc peddle 5 times, you will hear the pump run a few times

Thanks Duarte19,

I did use this method to bleed/prime the system before starting.

Also it there was air in the system, would there not be issues with running?

[Sharp]

Another possibility is that the fuel block could be fractured