Hi All,

Just picked up a 75 W115 and will be tackling drip timing this weekend. Looking at the primer pump on the 115 (I have the big round one on the fuel filter) I am wondering if I can install the later lift pump (I have a spare) on the earlier IP so I can put on once of those new plastic Bosch primer pumps on it.

Any info would be helpful.

Thanks,
Curt

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82 300TD
75 300D
99 F350 Crew Cab 7.3 Powerstroke

Check this sites part lists for the parts compatability? Never owned a 115 diesel myself.

came with an adapter to work on either size threaded mount.

The injector pumps are most likely to be different. The MW pump fitted to the turbo has a slightly different lift pump this has a wheel that runs on a cam inside the IP...



...whereas the M pump has a plunger



Pictures taken from this thread

Refreshing the fuel pump on an OM617 (European spec – non turbo)

Whilst the lift pump at the start of the thread shown above is for a later IP a M/RSF variation I'm pretty sure the earlier M pumps also have the plunger style lift pump...

...chapter 07-001 in the W123 non turbo section seems to back up my theory. (Numbers are either the same or very close)

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Interesting.....I had no idea the m pump had a piston....

Couldn't one switch a newer style mw non turbo ip onto a w115? I know it won't work on the 240D w115 as there is no internal oilier on the ip...

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In the case of a W115 it probably has the pneumatic governor with the buttery fly valve / throttle body on the intake - so that would have to go - and then there's the whole oil supply thing running from the intermediate shaft area into the IP that's needed for the MW pump (and the later M/RSF pump)...

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

I'm fairly sure I have an MW pump..just a really old one. I think I have the same one as in this thread. 1976 300d Injection pump delima

I'm also a little curious as to what the adjuster is where the ALDA would be on an MW pump.

__________________
82 300TD
75 300D
99 F350 Crew Cab 7.3 Powerstroke

Best way is to check the numbers on the IP with the numbers on the lift pump and the data in the FSM

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Here's the plate off the IP.



Seems I have the PES 5 MW 55/320 RS4. It's an MW pump.



Now, I need to see if I can get a picture of the lift pump. Little more difficult waaaay down in the engine bay. There's a lot less room in the W115 than there is in my W123.

__________________
82 300TD
75 300D
99 F350 Crew Cab 7.3 Powerstroke

Definitely the "wheeled" lift pump then - the turbo one should fit.

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

That is awesome news. Thanks Army!!

Now to figure out how to get to it. Looks like I'll have to go through the wheel well.

__________________
82 300TD
75 300D
99 F350 Crew Cab 7.3 Powerstroke