Hello guys,
I need some help,
What is the fire ring order on a 1969 w108 280se
Does anyone has a diagram ? im not sure if the one I have is correct
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05-09-2019, 03:42 PM
#1
05-09-2019, 05:14 PM
#2
Vasilios_Billy
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Location: Campbelltown NSW
Posts: 1,936
Club: M.A.L.A.K.A.S.
Car: 2020 AMG GT C
Rohan - the M130 inline-six firing order is 1-5-3-6-2-4.. your workshop manual diagram (Fig. 4.6) is correct..
Looking at the cap from the engine bay (front of car), with the rotor button at 12 o'clock:
- Cylinder 1 lead goes to the cap position the rotor points to at TDC compression stroke (typically marked with a small "1" on the cap)
- Then rotating clockwise on the cap: 5, 3, 6, 2, 4
- Then back to 1
If your existing leads are connected in any other sequence the engine will run rough or not at all. Confirm cylinder 1 by removing the #1 plug, putting a finger over the hole, and turning the engine by hand until you feel compression - that's TDC on the compression stroke. The rotor button position at that moment is your #1 cap terminal.
The diagram you posted is from the original 1965 W108 250SE workshop manual but the firing order is identical across the M129/M130/M180 family because they share the same crank throw sequence.
07-09-2019, 02:42 PM
#3
Billy thank you. Pulled #1, found TDC, rotor pointed exactly where the manual shows. Confirmed leads were in the correct 1-5-3-6-2-4 sequence. She fires up smooth now. Cheers..