W124 300TD - idle surge/hunting. Delivery valve seals at fault?

[Ed209]

Hi all,

The old girl has started hunting at idle. I've had a weep at the delivery valve seals for a while now, that I've never got around to fixing. Could this be the culprit?

If so, can anyone recommend an online supplier for the o-rings and copper washers please?

Thanks

 

[Ed209]

Well I've replaced the leaking delivery valve seals, and although it went successfully, it has not cured the idle hunting.

Can anyone offer any ideas?

 

[trapperjohn]

Sorry no. Never heard of a diesel "hunting" My diesel does have a small air leak on start up and fires on 5 only. (I call this "eco" mode) It then settles down and is smooth as a button all day long, but still air is travelling through the system even when it is running smoothly.

 

[SilverSaloon]

make sure the fuel lines are not leaking in too much air - look for bubbles in the clear lines.

does this continue to occur when the engine is up to temperature?

 

[bolide]

This is a 603-engined car? 300TD? Or an E300 Diesel?

Nick Froome

 

[carat 3.6]

make sure the fuel lines are not leaking in too much air - look for bubbles in the clear lines.

+1