W113 Pagoda SL Group > W11x chassis cars
help needed removing trigger points for injectors in lower distributor (M116 )
rutger kohler:
Hi, I want to remove the trigger points for the D jetronic fuel injector system, to clean them, in the lower part of my distributor. I can see the two screws I need to remove but can't get a screwdriver to the back one. Do I have to remove the distributor to do this, and of so how can I ensure I get the distributor back in exactly the right place?
Following through on this how can the dwell angle and distributor timing be set with a strobe light on the M116 engine. I can't see a pointer or anything down around the crankshaft pulley as you would on a normal engine. Am I looking in the wrong place?
Benz Dr.:
You will need to remove your distributor. Use a piece of tape or a paint mark indicated to where the rotor is pointed. The bottom of the distributor has a gear that will slide into place and may have to try a couple of times to get it set in the right place.
There should be a pointer on the front of the engine. If you have a lot of grease or crud on the front of your engine try to clean that off. We use a de-greaser and a power washer.
Trigger points slide out of the distributor and you can use electrical cleaner to remove any oil film.
rutger kohler:
Hi Don, thanks for that, all clear, but whereabouts on the engine front do you look for the timing marks. I am looking down from the front, between the engine and the motor towards the crankshaft pulley. It is like Diana's marriage, very crowded! The engine front is not that dirty but I can't see anything. Should have gone to specsavers?
Benz Dr.:
That engine should have a small pin with a pointed end somewhere near the water pump. That's the timing marker.
I like to clean the timing marks and put some white paint on them so they show up well.
rutger kohler:
Hi Don, finally found it. Surely I would need to remove the two drive belts to the power steering to be able to see a realistic reading with the strobe light, with the engine running?
Also is there a Haynes or similar teardown manual for cars with the M116, I need to know exactly where to connect the strobe light for dwell and timing. Have read some cautionary stories about damaging the transistorised unit by connecting to the wrong place.
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