Author Topic: 6.9 distributor fixes  (Read 1808 times)

raueda1

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Re: 6.9 distributor fixes
« Reply #15 on: 10 May 2019, 06:48 AM »
guys, I'm trying to do this clean up but I'm stuck trying to remove the first section under the dizzy cap, the one that has the injector contact and condenser screwed to it.

it looks to be heled in by 3 little indents in the distributor body, it looks like its simply twists round to align the indents with 3 gaps and off the plate should come. I've tried this but nothing budges, am I missing something??????

neil
Can't follow the question.  What's the injector contact and condenser?  Aussie nomenclature perhaps?  Maybe describe the picture(s) corresponding to what you're talking about.
-Dave
Now:  '76 6.9 Euro
Before that:  1966 230S, 1964 220SE coupe, 1977 Carrera 3.0

daantjie

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Re: 6.9 distributor fixes
« Reply #16 on: 10 May 2019, 08:54 AM »
Been tempted to do this too, but I have nightmare visions of me cocking something up, and this jobby turning into a nightmare.  My forays into the electrical "never never" have almost always led to pain and suffering :o
« Last Edit: 10 May 2019, 09:01 AM by daantjie »
Daniel
1977 450 SEL 6.9 - Astralsilber

irvine

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Re: 6.9 distributor fixes
« Reply #17 on: 10 May 2019, 05:32 PM »
When I take off the distributor cap the inside compartment holds the rotor arm, this sits on a plate which has the injector contact screwed to it. Also the arm from the retard diaphragm is fixed to the plate. Hope this helps.
 I’m out at the minute and on my phone I’ll post a pic once I get home.

Thanks,
Neil.

irvine

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Re: 6.9 distributor fixes
« Reply #18 on: 10 May 2019, 06:37 PM »
Here's the pics,

Plate with everything attached:
W116 by Neil Irvine, on Flickr

And now with the bits removed:
W116 by Neil Irvine, on Flickr

I've no idea how I'm supposed to remove the plate, I've tried twisting it, carefully prying it up, it wont budge.

Thanks,
Neil.

raueda1

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Re: 6.9 distributor fixes
« Reply #19 on: 11 May 2019, 02:24 PM »
Here's the pics,

Plate with everything attached:
W116 by Neil Irvine, on Flickr

And now with the bits removed:
W116 by Neil Irvine, on Flickr

I've no idea how I'm supposed to remove the plate, I've tried twisting it, carefully prying it up, it wont budge.

Thanks,
Neil.
Your pictures explain why I'm unable to offer much help.  You've got a totally different distributor than the one in my write-up.  Compare respective pix carefully.  Is yours actually from a 6.9?
-Dave
Now:  '76 6.9 Euro
Before that:  1966 230S, 1964 220SE coupe, 1977 Carrera 3.0

irvine

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Re: 6.9 distributor fixes
« Reply #20 on: 11 May 2019, 05:04 PM »
No it’s a 280 6 cylinder d-jet, I’ve searched loads on google and yours is the closest description I could get.

I ended up cleaning a mountain of gunk from inside the distributor, put it back together and it’s like driving a new car.

I recommend this overhaul highly

Neil.

daantjie

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Re: 6.9 distributor fixes
« Reply #21 on: 11 May 2019, 11:16 PM »
This brings to mind another question...Does anybody know for sure the right part# for the 6.9 distributor?  I have checked mine and it is stamped with Bosch number 0237405002, but when I Google it it shows it to be a 450SL version ????
Daniel
1977 450 SEL 6.9 - Astralsilber

Alec300SD

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Re: 6.9 distributor fixes
« Reply #22 on: 12 May 2019, 12:18 AM »
The plate may be sealed in place wih some adhesive.
Try prying it out as demonstrated in the link.
https://www.howacarworks.com/illustrations/dismantling-a-bosch-distributor--6
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TJ 450

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Re: 6.9 distributor fixes
« Reply #23 on: 12 May 2019, 03:19 AM »
Hi Daniel, yes I've been wondering this myself. I have a feeling that mine is an M117 part as well. It is also 0 237 405 002.

The engine still pings at 3.4k+ under load, despite having a rebuilt WUR and is running great otherwise.

Tim
1976 450SEL 6.9 1432
1969 300SEL 6.3 1394
2003 ML500

daantjie

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Re: 6.9 distributor fixes
« Reply #24 on: 12 May 2019, 09:49 AM »
Hi Daniel, yes I've been wondering this myself. I have a feeling that mine is an M117 part as well. It is also 0 237 405 002.

The engine still pings at 3.4k+ under load, despite having a rebuilt WUR and is running great otherwise.

Tim

Tim looks like the "right" number is 0237404007. Will this make a big difference in performance?
Daniel
1977 450 SEL 6.9 - Astralsilber

daantjie

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Re: 6.9 distributor fixes
« Reply #25 on: 12 May 2019, 02:15 PM »
Correction, looks like the 0237405002 is the correct distributor for the US spec 1977 - 1980.  I did some sleuthing and the boys @ the (now dormant, maybe dead(?)) M100 board corroborate this. Also confirmed in the service manual. Euro has part number ending in 004 and 007.
« Last Edit: 12 May 2019, 03:43 PM by daantjie »
Daniel
1977 450 SEL 6.9 - Astralsilber

TJ 450

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Re: 6.9 distributor fixes
« Reply #26 on: 12 May 2019, 08:37 PM »
I see, okay that’s good to hear. I’ve started tearing down my spare one of the same part number, so will hopefully get some results.

There is a new M100 board currently being set up.

Tim
1976 450SEL 6.9 1432
1969 300SEL 6.3 1394
2003 ML500

slfan

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Re: 6.9 distributor fixes
« Reply #27 on: 01 June 2019, 12:37 AM »
Hello Administrators,

This post is great and has extremely helpful information.  Any chance it can be fixed at the Top of the Mechanical section? Just a suggestion.

Best regards,

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

daantjie

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Re: 6.9 distributor fixes
« Reply #28 on: 05 June 2019, 08:40 AM »
Quick question on this very informative post.
What do you guys think the function is for the little cover plate/plug in the bottom section of the housing?  Is it perhaps to clean/lube the mechanism?  I guess you can blast this spot with some carb cleaner to de - gunk the works if you are not keen to pull the whole thing apart, though that of course would be the best way to do it.
Daniel
1977 450 SEL 6.9 - Astralsilber

TJ 450

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Re: 6.9 distributor fixes
« Reply #29 on: 06 June 2019, 05:58 AM »
I had mine apart the other week, all cleaned and lubricated although the car feels different, I have not experienced any miracles yet.

I will be rebuilding the cast iron fuel distributor next.

That plate, yes I was thinking the same. It must be for servicing.

Tim
1976 450SEL 6.9 1432
1969 300SEL 6.3 1394
2003 ML500