Hi and welcome to the fun world

Post some photos of your engine bay and I am sure all of us here will try to help.

Where about are you?

Cheers

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Fitian
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This doesn't sound right to me. my 300D doesn't appear to be lubricated by engine oil. Can somebody please explain this to me?

Thanks in advance.

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Cheers
Nick.

Roidio 2001 Holden Rodeo 4x4 2.8L TD. 2.5" exhaust sytem, H/E shower system. 4" Lift, Airbags, And lots of fruit, B100 for 35,000 .

Elsa 1983 Mercedes-Benz W123 300D. Still The Fastest Merc in Oz, Self built and Female proofed.

Nick,
What I said is correct, but is more important in engines with rotary IPs.

Capt Echidna is also correct in that the Bosch inline IP in the 300D and other similar engines is lubricated by engine oil.

In some earlier models, the IP had its own sump and filler cap. ion the 300D, the IP receives oil from the engine which drains back to the engine after passing thru the workings.
The fuel still needs to have lubricating properties as it lubricates the valves in the IP High Pressure outlets (to the injectors) and the moving parts in the injectors themselves

I hope this helps,
Tony

Hi tony i should have been clearer.
I don't disput your comment on the lubricity of the veg at all, i shouldn't have put that in.sorry

My 83 300d doesn't have any oil lines to or from the IP. it doesn't appear to have its own sump or filler either. strange.
If you look closely at the first and second pictures you can see threaded holes that haven't been drilled. Is this where lines would usually attach. I hope these help you explain this to me Thanks
Nick

__________________
Cheers
Nick.

Roidio 2001 Holden Rodeo 4x4 2.8L TD. 2.5" exhaust sytem, H/E shower system. 4" Lift, Airbags, And lots of fruit, B100 for 35,000 .

Elsa 1983 Mercedes-Benz W123 300D. Still The Fastest Merc in Oz, Self built and Female proofed.

While I don't know the path the oil takes to the IP, if I take off the side plate of the IP, behind the fuel pump, the oil in there is black, indicating that it is sump oil.

Perhaps it comes via the mating flange of the IP, where it contacts the timing chain gallery.

Tony

Hi Nick,
The IP on 300Ds has to be lubricated by engine oil. The lift pump as Tony said drops a fair amount of engine oil. If you take off the three nuts "size 10mm", the lift pump will come undone and oil will come out.

While you at it change the gaskit behind the lift pump.

You'll get better help if you post your question about your 300D on Ozbenz forums and also MercedesShop - Mercedes Benz Parts and Technical Information

Cheers

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Fitian
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Fitian
At the beginning of the post you where suffering from a fuel starvation problem when you did the conversion. you have fixed it by now but you never mentioned how or what fixed it. Was it the fuel filter.

Hello Hicko,

It was the CAV filter cast. It was leaking air into the system from under the centre bolt - It was fixed by re-machinning the seat "See photo" . There was some after market CAV filters back then and I mistakenly bought one.

Also the delphi element was restricting the flow. But I am using Fleetguard now and it works beautifully.

Regards

Attached Thumbnails

   

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Fitian
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My Delica is suffering from very similar problem at the moment. But it seem to come and go. I suspect that it may be the filter. So I will bypass it today and see what happens.

Your spot on Tony, I investigated all possible places on these bosch inline 300d IP's and it does receive lubrication from engine oil from the Front flange.

I haven't bothered changing the gaskit as i haven't removed the lift pump and it isn't leaking.




so there you have it punters they ARE lubricated by engine oil even if they don't look it.

Cheers Nick.

__________________
Cheers
Nick.

Roidio 2001 Holden Rodeo 4x4 2.8L TD. 2.5" exhaust sytem, H/E shower system. 4" Lift, Airbags, And lots of fruit, B100 for 35,000 .

Elsa 1983 Mercedes-Benz W123 300D. Still The Fastest Merc in Oz, Self built and Female proofed.