Author Topic: 6.9 distributor fixes  (Read 2792 times)

slfan

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Re: 6.9 distributor fixes
« Reply #30 on: 07 August 2020, 12:59 PM »
Hello,

I am about to remove the distributor to perform this cleaning in the distributor of my 6.9 and want to make sure that I can re-install correctly in the engine.  Can somebody please inform me the TDC reference (marks) that I need to align before removal?  This would be greatly appreciated it.

Thank you very much!

Angel
1978 - 450SEL 6.9 - 3170
1978 - 450SEL 6.9 "Parts Car" - 2973

daantjie

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Re: 6.9 distributor fixes
« Reply #31 on: 07 August 2020, 04:46 PM »
You need to have the crank pointer point at "0", then you'll see the rotor tip point to a tiny scribed mark on the rim of the distributor with cap removed of course. 
Daniel
1977 450 SEL 6.9 - Astralsilber

raueda1

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Re: 6.9 distributor fixes
« Reply #32 on: 08 August 2020, 08:58 AM »
You need to have the crank pointer point at "0", then you'll see the rotor tip point to a tiny scribed mark on the rim of the distributor with cap removed of course.
This is certainly the best way and guarantees that it will go back right.  However, not absolutely, strictly 100% necessary.  You can also just mark the location of the rotor on the distributor AND the position of the distr by the lock screw where you rotate to set timing.  If you're like me, you'll probably use a felt tip pen and the markings will disappear.  :o  Then you'll wish you did it as Daniel suggests. :o Note that the distributor will rotate significantly when you pull it out. 
-Dave
Now:  '76 6.9 Euro
Before that:  1966 230S, 1964 220SE coupe, 1977 Carrera 3.0

slfan

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Re: 6.9 distributor fixes
« Reply #33 on: 08 August 2020, 03:43 PM »
Daniel & Dave,

Thank you VERY much! Will follow this carefully. I have never removed a distributor.  This will be my first time.  Will have help though from a friend who is much more experienced in these matters than me. 

Will share the results afterward.

Wish a very nice weekend to both of you.

Regards,
Angel
1978 - 450SEL 6.9 - 3170
1978 - 450SEL 6.9 "Parts Car" - 2973

slfan

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Re: 6.9 distributor fixes
« Reply #34 on: 26 August 2020, 01:54 PM »
Daniel & Dave,

I am "building courage" to do this task with a friend and I have one last question before beginning:  would know the "firing order" of the different cylinders for the 6.9 engine?  Sorry for so many questions.

Thank you & best regards,
Angel
1978 - 450SEL 6.9 - 3170
1978 - 450SEL 6.9 "Parts Car" - 2973

rumb

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Re: 6.9 distributor fixes
« Reply #35 on: 26 August 2020, 03:00 PM »
The firing order is cast into the valve covers and the distributor cap terminals are numbered.
'68 250S, '77 6.9 euro, '91 300SE, '98 SL500 '14 CLS550

raueda1

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Re: 6.9 distributor fixes
« Reply #36 on: 26 August 2020, 06:15 PM »
Just a comment....     This job isn't really too bad.  You can do it on a kitchen table after removing distributor.  One word of warning though.  As noted in the original postings, there's a tiny locating pin that aligns things.  It is TINY and very easy to lose.  Keep your eyes open and make sure it doesn't go flying off someplace.  Good luck and don't worry about the questions.  Cheers,
-Dave
Now:  '76 6.9 Euro
Before that:  1966 230S, 1964 220SE coupe, 1977 Carrera 3.0

slfan

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Re: 6.9 distributor fixes
« Reply #37 on: 30 August 2020, 01:07 PM »
Dave & Rumb,

Thank you!  Will share later the internal condition of mine.

Regards to All!

Angel
1978 - 450SEL 6.9 - 3170
1978 - 450SEL 6.9 "Parts Car" - 2973