Thread: Problem with td6

Sounds dodgy to me,how can the fuel pump fill the sump?,clean out the engine breather,that will cause the same simptoms. Pat

Do these engines run cylinder liners? I know on one of my trucks a few years ago, I cracked a liner and the result was that the sump filled with diesel, the result was an in chassis rebuild, but this was on a Detroit 14 litre, technology may be different in the European motors?hope It's a simple fix for your mate!

Pete it could be as simple as a leaking injector, seal or line. Other possibilities are cracked head or timing is out (rare, but fuel would go past piston). Start by checking the simple things first, if you don't feel comfortable try a local diesel truck mechanic. I hope when you said it stopped in a cloud of smoke,it hadn't been free reving ( runaway engine) that resulted in a major death rattle.

I've been trying to find a scenario where fuel could end up in the sump of a TD6 and the only way I can think of is past the piston. the fuel system goes no where near the inside of the engine until the injectors' nozzles, as there is no internal "rail", no fuel cooler, and the main high pressure pump is external and belt-driven.
I wonder if an injector has been leaking....
Did he have the car sitting for ages with the ignition left on, but the motor not running?(although I think the pumps turn off after a few seconds anyway).
Did he have a mis-fire or rough running for a while before the major problem?(low compression,(burnt valves, worn valves, loose injector) fuel not burning, leaking past rings)

Hmmm.....let us know if/what you find out


Cheers,
Fraser

Originally Posted by fraser130

the main high pressure pump is external and belt-driven.

These don't have timing belts. The pump is driven by the cam chain. It is possible for the front seal to leak on the pump and fill the sump. There is a special service tool for removing the sprocket off the pump.

1st thing to do if you don't suspect engine damage through a runaway engine would be to remove injectors ( if you can, they have a habit of seizing into the head) and pump and have them tested.

Originally Posted by woko

These don't have timing belts. The pump is driven by the cam chain. It is possible for the front seal to leak on the pump and fill the sump. There is a special service tool for removing the sprocket off the pump.

1st thing to do if you don't suspect engine damage through a runaway engine would be to remove injectors ( if you can, they have a habit of seizing into the head) and pump and have them tested.

You are absolutely correct, my mistake. It could very well be the front seal of the High pressure pump.
I do know it has no timing belt, but I mistakenly thought it was driven by the serpentine belt as it has no "timing" it's just a constant pressure pump, all the timing is electronic.

Cheers,

Fraser

There was no runaway and it would appear that injectors are still patent. Thanks for the info about the front seal of the high pressure pump - this would appear to be the problem. Now what about the rest of the engine? Repair the damaged item and clear faults and try again?

That's how I'm thinking the advice may go.....

Thanks for the input, gents.

Pete

Originally Posted by Pierre

There was no runaway and it would appear that injectors are still patent. Thanks for the info about the front seal of the high pressure pump - this would appear to be the problem. Now what about the rest of the engine? Repair the damaged item and clear faults and try again?

That's how I'm thinking the advice may go.....

Thanks for the input, gents.

Pete

I recon so....you might even be able to get a S/H one from a BMW wreckers at 1/4 the price if the pump is non-servicable ((M57 engine)