C250TD OM605 Timing Marks

[91dm]

Just looking for some info on the timing marks for a OM605 engine.

I have the crank at 0, the two marks on the cams across from each other so the pin fits it. However the engine locks up when trying the turn it by hand?

Any help appreciated.
Thanks

 

[91dm]

Can anyone tell me what cylinders should be up along with the 1st at TDC?

 

[Dieselman]

Not on a 250, it's 5 cylinder so all independently timed.

 

[91dm]

Ok thanks, do you know if there are any other marks on the bottom pulley to look out for? I checked that the first cylinder (front of the engine bay) is at the top when the timing marks at 0.

 

[Dieselman]

The simplest way of checking would be to have the pump at 180 degrees out and to check the valves for No1 are timed and "on the rock".

If the valve timing is for the valves to be on compression then it can't be wrong.

 

[91dm]

I think the problem is with the camshaft timing. I’ve the two punch marks on the cams together and the pin through the inlet cam through the carrier. The 5th cylinder is hitting the valves when I’m turning the engine over.

 

[91dm]

Here’s a picture of the autodata instructions, everything is aligned as the diagram shows.

 

[Dieselman]

Here’s a picture of the autodata instructions, everything is aligned as the diagram shows.

Then I would say the valves and pistons are not contacting. How would it only be no5 cylinder with the issue?

 

[91dm]

The 5th cylinder is the next to come up. If I let the piston down again I can feel that the valve opens more.

 

[Dieselman]

Can you pull the tappets out and wind it over with the valves closed?

 

[91dm]

Yes I tried turning it with the all the valves close to check the chain was ok.

 

[Dieselman]

Wind it 350 degrees from the normal marks and check the No1 valves are just "on the rock".

 

[91dm]

Thanks DieselMan for the advice, I’ve the recon pump fitted to the car.

The car runs for about a minute but then dies and won’t idle very well. I’ve checked the timing, at 14 degrees the pointer on the pump cam is visible through the side.

I notice that when I took one of the injector pipes off the top of the pump, it seem to be weak compared to before. The diesel bubbles at top, I was expecting it too be higher pressure more of a squirt, is this normal?

 

[Dieselman]

Either there is air in the pipes, the lift pump isn't delivering a healthy stream or the leak off bolt has the wrong orifice so isn't generating internal pump pressure.

 

[91dm]

When I got the pump from being reconditioned, the two pipes on the lift were the round way wrong so it was pumping diesel away from the filter. I’ve had the lift pump off, you can see that it’s pumping diesel around ok.

I can see some small air bubbles in the return pipe on the back off the pump, will check that next. Should there be a clear spray from the top of pump?

 

[Dieselman]

Connect an injector and see if it sprays ok.