advancing the injector pump?

[Olivier]

Hello, I was reading that advancing the injector pump by 3 degres it's better when running on WVO.
How this could be done?
Any special tools for this?
Does the bloody manifold need to be off or we can do this under the car?
Thank you.
Olivier

 

[Uberwagon]

On our diesels the pump was located by a potruding ring on the pump body with the shaft at its centre and then secured with 3 bolts on the outside. These outside bolts were turned into kidney shaped holes and we used to loosen these and alter the timing while the engine was running.

Dave!

 

[lynall]

This was a common mod on the TDI discovery with the EDC engine to help cold satrting as they just started as opposed to bursting into life and are adjusted exactly as Dave says.

I have done a couple not hard, if you went to far engine check light came on, retard it slightly and its sorted.

Just mark positions before you start so you have a reference point.



Lynall

 

[Olivier]

Sorry but I don't know where to start or what to do. I haven't got a clue to which bold loosen/ movement left/right to do.
Any hint?
Cheers. Olivier

 

[Dieselman]

iirc, it's two on the IP flange and one at the rear of the pump body where the support bracket clamps. You can then turn the pump and fine tune it with the brass vernier bolt at the front of the pump.

You will need a test lamp or at the least a blocking tool to hold the pump shaft still and centered.
I wouldn't do this without knowing the initial position and how much the cam chain is stretched causing the cam and pump to retard.

The static timing as measured by the lamp is 14 deg ATDC.

You need the manifold off.

Advancing the pump will reduce back end burn and possible cold quench but will make the engine rougher generally.
Don't forget this pump, unlike pretty well all others, has no cold advance so will tend to have retarded cold start ignition on veg oil anyway.

 

[spock500]

Take a look at the diagram in this thread, this is pump looking at it from the front.

http://www.mbclub.co.uk/forums/showthread.php?t=62974

 

[Olivier]

DieselMan, there is no need then to change the advance then?
Certainly wouldn't like to get a rougher engine.
Thank you.
Olivier
I'm an expert taking off the manifold now.