W108 280se engine head swap - Page 2 - Mercedes-Benz Forum

LinkBack Thread Tools Display Modes
post #11 of 15 (permalink) Old 07-13-2015, 05:09 AM
w108,107 Parts Hoarder
Fonzi's Avatar
Date registered: Jun 2010
Vehicle: slc5.0cab 280sl5sp 280se4.5 500sl92 GONE:280sl79 4xW114/5 3x450sl72-3 280slc4sp81 280s69 73,81SLCs
Location: Philadelphia Area
Posts: 18,537
Mentioned: 27 Post(s)
Quoted: 1569 Post(s)
Lifetime Premium Member
W108 280se engine head swap

Originally Posted by yaki b View Post
The 280s block has no provision for the oem mechanical FI pump.
The 280se head could work on a 280s block but you will need to plug the injector ports and may require an adapter for the heater hose outlet.

To clarify... It looks like you are saying that maybe the 280se (injected) head might be able to work on a 280s engine block, but in a carburetor setup, not a fuel injected setup. Correct?

If the oem mechanical fuel pump is the only issue with using a 280s lower end in a 280se, might you be able to simply use and an electric fuel pump? Too dangerous?


My signature:
My dream car is a classic sporty five speed (stick+overdrive) convertible that seats five. If, you want 70's-80's Mercedes tuner wheels, let me know.
Fonzi is offline  
Sponsored Links
post #12 of 15 (permalink) Old 07-14-2015, 04:07 AM
BenzWorld Member
Date registered: May 2006
Vehicle: 2000 ML320, 2005C240 4matic wagon, 1962 220SEb, 2002 CLK55 Cabrio, 2014 C300 4matic, 2000 CLK55
Location: NJ
Posts: 131
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
Clarification is correct.
The oem fuel pump is a complex devise that precisely meters and distributes the fuel to each cylinder and is rotated by an additional gear from the timing chain.There is an electric fuel pump that supplies the fuel from the tank to the mechanical pump.
The term "simply" is not to be used when discussing this era of mechanical fuel injection.
yaki b is offline  
post #13 of 15 (permalink) Old 07-28-2015, 06:26 PM
BenzWorld Junior Member
Date registered: Nov 2012
Vehicle: 84 300 DT, 69 280 SE Cp low grill, 09 C 300, 68 280 SE, 2 350 SL 4 sp, 65 220 SEb Cp, 92 500E
Location: Nazareth PA
Posts: 26
Mentioned: 2 Post(s)
Quoted: 3 Post(s)
I am under the impression that there are 2 versions of the 280 SE injected head. Correct?

I was told that a early version head will not work on a later version block


Would a later version head work on the early block?

Thanks in advance for your help
rockingchairmotors is offline  
post #14 of 15 (permalink) Old 07-28-2015, 09:11 PM
BenzWorld Senior Member
drew56cus's Avatar
Date registered: Oct 2006
Vehicle: 1965 220SE sedan (finnie) with 450SE conversion, 1964 220SE coupe project, 1966 300SE coupe
Location: Brisbane Australia
Posts: 410
Mentioned: 1 Post(s)
Quoted: 32 Post(s)
Gee I vaguely remember stuff about this when I encountered it last year. Something about square combustion chamber (old) vs round (newer). IIRC you could the later head onto the early block, but needed to hammer a thin piece of copper wire into a thin water jacket slot to block it off as the early head did not have the water jacket.
Hopefully this will jog someone elses memory otherwise I will have to go to my mates house to get the spare head and look at it again.
drew56cus is offline  
post #15 of 15 (permalink) Old 07-29-2015, 08:36 AM
BenzWorld Junior Member
Date registered: Nov 2012
Vehicle: 84 300 DT, 69 280 SE Cp low grill, 09 C 300, 68 280 SE, 2 350 SL 4 sp, 65 220 SEb Cp, 92 500E
Location: Nazareth PA
Posts: 26
Mentioned: 2 Post(s)
Quoted: 3 Post(s)
I looked up some info on the Pagoda site and a few people there claim that they are not interchangeable.

I was sure that a later version head would fit on a early block. Again we are just talking 280 SE M130

Does anyone have first hand experience with this?

rockingchairmotors is offline  
Sponsored Links

  Mercedes-Benz Forum > General Mercedes-Benz Forums > Vintage Mercedes-Benz

Quick Reply

Register Now

In order to be able to post messages on the Mercedes-Benz Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


  • Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
    Thread Tools
    Show Printable Version Show Printable Version
    Email this Page Email this Page
    Display Modes
    Linear Mode Linear Mode

    Posting Rules  
    You may post new threads
    You may post replies
    You may not post attachments
    You may not edit your posts

    BB code is On
    Smilies are On
    [IMG] code is On
    HTML code is Off
    Trackbacks are On
    Pingbacks are On
    Refbacks are On


    Title goes here

    video goes here
    description goes here. Read Full Story
    For the best viewing experience please update your browser to Google Chrome