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Injector seals/seats confusion

Started by irvine, 28 February 2019, 03:42 AM

irvine

Hey team, I'm going to pull the injectors in my 280se (d-jet) and replacing the seats and o-ring.
Problem is I can't find them for sale anywhere. The only ones are on eBay in the USA and state they fit w116, w124 & w126
Obviously that means the parts listed are for k-jet injectors.

Now my question is what physical differences are there in d-jet and k-jet injectors, are the seats and seals interchangeable??

Thanks,
Neil.

UTn_boy

The injector seals between D-Jetronic and K-Jetronic are not the same and will not interchange. 

The injector seals for your D-Jetronic 280se are still available new from Mercedes for around 1.61 Euros each.  Can you not just go to a local dealership or parts specialist and order them?  They're really inexpensive and readily available.  Part number 116-078-04-73.  Also, the aforementioned seal is the only seal there is.  There is no o-ring.  The big think rubber ring that is on the injector is nothing more than a cushion for the metal bracket that holes the injector down.  It has nothing to do with sealing. 
1966 250se coupe`,black/dark green leather
1970 600 midnight blue/parchment leather
1971 300sel 6.3,papyrus white/dark red leather
1975 450se, pine green metallic/green leather
1973 300sel 4.5,silver blue metallic/blue leather
1979 450sel 516 red/bamboo

irvine

Aaahhh I've been looking at k-jet parts then lol.
Cheers for the info, it actually makes sense now.

Neil.

TNNBENZ


     Yes it makes sense now !!!   Thankx .......I was very confused........
Neglected ~ Rescued ~ 1977 450SEL 4.5L  U.S.A. ver.
Project of Compassion ~ Respect
Silver Green Metallic / Toast
Left Hand Drive
Sliding Roof

TNNBENZ

Neglected ~ Rescued ~ 1977 450SEL 4.5L  U.S.A. ver.
Project of Compassion ~ Respect
Silver Green Metallic / Toast
Left Hand Drive
Sliding Roof

goldacre

From memory it's only 10NM for the K Jet hold down clamps.

G
12/1979 450 SEL 148K on clock (museum piece)
12/1986 Lotus Esprit Turbo 87K on clock 'Darling, look what Q has brought for us, isn't it nice' :)

TNNBENZ

Quote from: goldacre on 13 November 2021, 03:05 AM
From memory it's only 10NM for the K Jet hold down clamps.

G
Thank-you very much, saves me valuable time looking for this spec.......
Neglected ~ Rescued ~ 1977 450SEL 4.5L  U.S.A. ver.
Project of Compassion ~ Respect
Silver Green Metallic / Toast
Left Hand Drive
Sliding Roof

mrkozzy

#7
What is torque?

On a D-Jet (280se) this is what happens to the hold down clamp when you don't use the correct pressure to tighten it.
Its cast, so it snaps in 2 just like a "cheese cracker".
Now I have learnt my lesson and if I ever do it again, I will use the proper tool with the recommended pressure.

Oh and I have purchased 3 extra hold down clamps "just in case".
MrKozzy

TNNBENZ

     Thank-you  mrkozzy  :) 
   This will give me more incentive to properly torque the screws if I get impatient ; as I often do........ ::)
Neglected ~ Rescued ~ 1977 450SEL 4.5L  U.S.A. ver.
Project of Compassion ~ Respect
Silver Green Metallic / Toast
Left Hand Drive
Sliding Roof