How to bleed a Pulse Diesel Engine

[Sailfree]

2007 Seat Altea FR 2.0 Pulse Diesel Engine. 170BHP

Looked everywhere for info but can't find any ! Can you manually bleed the diesel? If so how?

All i can find is info/you tube videos of post 2009 TDI's !!

I have replaced the timing belt and to get access I had to disconnect the Flow and return Diesel lines to the Diesel filter. Car started but then stopped - obviously air in the fuel lines.

Don't want to crank the engine too much in case the engine mounted fuel pump (high pressure) lack diesel and hence lubrication.

If i disconnect the return fuel pipe at the filter and just switching on the ignition to get the diesel lift pump to fill the lines and engine pump do I just crank the engine until it fires?

AI is completely wrong - it says remove rocker cover and loosen the diesel lines at each injector (i have done this before on marine diesel engines) - but rubbish for a PD engine - there are no fuel lines beneath the rocker cover! It appears to me that the injectors are fed through galleries in the head casting - so nothing there to bleed!

 

[James_R]

Just crank it until it starts. It's very unlikely you'll do any damage to a PD high pressure fuel pump, they're very robust.

 

[Sailfree]

Thanks

 

[Sailfree]

Bleed the diesel from the diesel return line at the fuel filter and getting diesel through. Engine has fired up for 1 sec about 4 times in 25 attempts. Sounds OK when it runs - albeit briefly.

I suspect because I did not bleed the fuel line before reconnecting I have air between the high pressure pump and the injectors. From lifting the rocker cover there are no fuel lines so fuel must go along galleries in the head to the injectors and air in these galleries is compressing.

Is this where i need the OB2 software to bleed these galleries and is there a cheaper OB2 reader that can complete this?

any other ideas?

 

[Sailfree]

Its now started a few times - once for about 5 seconds but then dies!

In owners manual it says car will take a few attempts at starting if the diesel tank has run dry so it is obviously self bleeding.

Will keep trying!

 

[Sailfree]

Looking at a couple of you tube videos it say run the software for 3 min - this I assume runs both diesel pumps without turning the engine over.

Cunning plan!

Disconnect the starter motor cable. Then turn ignition key to start for 3 min. Both the lift pump and the high pressure pump should be energised just no starter motor working. Bleed diesel from return line to check for air but after 3 min it should be air free.

Reconnect starter motor and the return fuel line to filter housing and try to start car again.

When it starts albeit for seconds it sounds OK and my gut feel is that its fuel starvation but can anyone think of other reasons for it only running for 1 sec and even then only randomly starting for 1 sec?