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 6.3
 removing the radiator
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abl567

Australia
922 Posts

Posted - 01/19/2018 :  23:54:15  Show Profile  Visit abl567's Homepage  Reply with Quote
Here is the oil inlet, centre of frame






300SEL
6.3 #2723, my first classic Benz
3.5 #8659, my second.
2 to go...
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abl567

Australia
922 Posts

Posted - 01/20/2018 :  00:05:53  Show Profile  Visit abl567's Homepage  Reply with Quote
Here's a thread on the subject.
http://m-100.co/forum/topic.asp?TOPIC_ID=4611&SearchTerms=MFIP,oil,line


300SEL
6.3 #2723, my first classic Benz
3.5 #8659, my second.
2 to go...
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Art Love

Australia
6193 Posts

Posted - 01/20/2018 :  01:31:20  Show Profile  Reply with Quote
This is silly. I've provided photographs of the high pressure oil line to the MFI in both the 600 and the 6.3 motors plus the part numbers and descriptions of this oil line and I am being told that this oil line does not exist or it is an after market modification. This is a one way pressure line that pressurizes the injector elements in the MFI. There is no through flow. The fuel inflow and outflow lines on the MFI are visible in a couple of the photos I posted at the front at the top on the left and to the rear at the top on the left. As Ant correctly pointed out and as I have shown in my photos, the oil inflow port on the MFI is on the right side of the pump part way down below the 6th injector element, on the opposite side of the pump from that shown in the 6 cylinder pump that Paul posted a photo of.





Here is the page from the Service Manual describing removal of the MFI in the 6.3. Note paragraph 4.




Here is the relevant reference highlighted in paragraph 4.




Here is the relevant page in the M100 Parts Manual showing the oil system for the motor.




Here is the part of the page showing the set up in the early 600. Part 97 is the oil pressure line to the fan coupling shut off valve. Part 99 is the oil pressure line from that line via a T junction to the MFI where the banjo fitting and hollow bolt are shown. In the 6.3, the fan has a viscous coupling, totally different from the oil fed fan clutch on the 600 and pipe 99 goes all the way from the oil filter housing. This is not shown in the Parts Manual.




Here is the page with the description of the parts shown in the diagram page.




Here is the description of part 99 clearly stating that it goes to the injection pump. These are the part numbers that I described earlier today.

This is NOT an after market modification. This oil pressure line is in all 6.3's and 600's. As I said, it has nothing to do with the MFI lubrication, totally unlike the 6 cylinder pump that Paul illustrated. As far as I understand it, the oil pressure that it provides acts as a seal against fuel pressure in the injector elements. Sorry to have to repeat myself.
Art
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paul-NL

Netherlands
4221 Posts

Posted - 01/20/2018 :  07:03:50  Show Profile  Reply with Quote
Thanks Anthony and Art,

Learned again something new.

Sorry for my confusion in this matter.

Edited by - paul-NL on 01/20/2018 07:04:33
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6.3Nut

USA
192 Posts

Posted - 01/21/2018 :  13:36:05  Show Profile  Reply with Quote
Art apologies are in order. I was mistaken about that line. This, as usual, shows your immense knowledge.

There cars and then there are BABIES!
1969 Euro Model
10901812000931
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