Author Topic: Injector seals/seats confusion  (Read 623 times)

irvine

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Injector seals/seats confusion
« on: 28 February 2019, 12:42 AM »
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

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Re: Injector seals/seats confusion
« Reply #1 on: 28 February 2019, 08:28 PM »
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
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irvine

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Re: Injector seals/seats confusion
« Reply #2 on: 01 March 2019, 12:18 AM »
Aaahhh I’ve been looking at k-jet parts then lol.
Cheers for the info, it actually makes sense now.

Neil.

TNNBENZ

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Re: Injector seals/seats confusion
« Reply #3 on: 12 November 2021, 07:44 PM »

     Yes it makes sense now !!!   Thankx .......I was very confused........
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TNNBENZ

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Re: Injector seals/seats confusion
« Reply #4 on: 12 November 2021, 07:46 PM »

     What is  the torque ?
Neglected ~ Rescued ~ 1977 450SEL 4.5L  U.S.A. ver.
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goldacre

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Re: Injector seals/seats confusion
« Reply #5 on: 13 November 2021, 12:05 AM »
From memory it's only 10NM for the K Jet hold down clamps.

G
12/1979 450 SEL 148K on clock (museum piece)
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TNNBENZ

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Re: Injector seals/seats confusion
« Reply #6 on: 13 November 2021, 07:33 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.......
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mrkozzy

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Re: Injector seals/seats confusion
« Reply #7 on: 14 November 2021, 12:32 AM »
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".
« Last Edit: 14 November 2021, 12:37 AM by mrkozzy »
MrKozzy

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Re: Injector seals/seats confusion
« Reply #8 on: 15 November 2021, 09:14 AM »
     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
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