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MERCEDES W116 Discussion specific to the W116 model

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  #31  
Old 8th April 2013, 04:56 PM
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Default Re: 6.9 # 7114 - it lives !

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Originally Posted by CraigS View Post
No trouble - just routine maintenance on a 6.9 !
Hi Craig, sorry that I have to disagree with you on that one. 6.9s are generally stock reliable in the area of engine and mechanical components. You just replace components every five to eight years or so. I do think that probably some of your problems can be traced to the long lay-off the car has experienced for so many years now. Regards Styria
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  #32  
Old 8th April 2013, 05:11 PM
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Default Re: 6.9 # 7114 - it lives !

And that is exactly what I am doing ! I have had the car for 6 years, the PO for 4 years - all laid up. The original problems arose because the PO left it under a tree and water got into the fuel tank. That obviously circulated through the system during our time of trying to get it running, with the result that the critical components of the system need work. Once resolved, I wouldn't expect to have to touch any of these for at least 10 and hopefully 20 years.
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  #33  
Old 9th April 2013, 06:09 AM
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Default Re: 6.9 # 7114 - it lives !

Give me a phone call, Craig, when I'm upstairs to keep me posted on how the components have stood up. I might just be able to lend you a guiding hand by that time ! Regards Holier than Holy Styria
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  #34  
Old 11th April 2013, 08:12 AM
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Default Re: 6.9 # 7114 - it lives !

Depends if I get there before you !

I repaired the problematic air slide yesterday. As mentioned, it was not closing, leaving about a 3mm space between the piston and the top, which would have, or was, causing a problem with the idle speed.

I put a socket over the thermostat bulb to protect it, put it in the vice, and wound it down. Apparently over time, the top seal, which is a press fit, moves upwards ever so slightly, but sufficient to cause the problem outlined. It now closes completely, so will see how it performs when everything is back on the car.
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  #35  
Old 5th May 2013, 05:02 PM
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Default Re: 6.9 # 7114 - it lives !

Fuel divider, Warm-up regulator have been rebuilt/cleaned and apparently came up very well. Today, I removed the fuel tank. I was never convinced it was any good - don't ask me why, but I picked up a nice clean one this week, so out came the old one. Here is why I am glad I did

http://i109.photobucket.com/albums/n...ps476403ae.jpg

You should be able to scroll from the above. Note the crud in the strainer and strainer opening and the remnants on the ground. The blistering paint also tells me it is rusting from the inside out.

For reasons known only to Photobucket, you may need to scroll forward and back from the above.

Last edited by CraigS; 5th May 2013 at 05:04 PM.
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  #36  
Old 5th May 2013, 09:09 PM
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Default Re: 6.9 # 7114 - it lives !

Holy hell! And that's why it pays to check the supply FIRST before doing any other repairs to the fuel system! Imagine if you'd just refitted the divider and warm-up regulator and tried to start the car as it was....

Craig do you own those other 2 cars?
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01 Ford AU 5L (Deep Blue)
89 560L#322020
88 500L#451660-P
88 420L#422477-P
87 420L#324309-P
87 420L#-P
88 420L Euro#-P
88 420L#-P
86 560L#235896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora)
77 450L#067010-P
75 450L#028414 (Gold Nugget)-P
57 Buick 73A (Titanic)
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  #37  
Old 5th May 2013, 09:24 PM
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Default Re: 6.9 # 7114 - it lives !

It was stated by Peter Bower (that did the recon of the fuel divider etc) that the fuel tank and lines must be spotless before reinstall. I had planned to change the tank anyway, as mentioned in another post where I was looking for a fuel tank. I can only say that I am glad I did !

What other 2 cars ? If you are referring to the line-up of W116's on the Photobucket site, they were all 6.9's, plus I had another one not pictured, but they have all gone bar the Inca Rot one.
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  #38  
Old 5th May 2013, 09:43 PM
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Default Re: 6.9 # 7114 - it lives !

Yes I was referring to those ones. Did you own them all? Where did they go?
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01 Ford AU 5L (Deep Blue)
89 560L#322020
88 500L#451660-P
88 420L#422477-P
87 420L#324309-P
87 420L#-P
88 420L Euro#-P
88 420L#-P
86 560L#235896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora)
77 450L#067010-P
75 450L#028414 (Gold Nugget)-P
57 Buick 73A (Titanic)
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  #39  
Old 5th May 2013, 09:51 PM
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Default Re: 6.9 # 7114 - it lives !

Yes, they were all mine, but I had about 14 cars at that time, and it was getting a bit out of hand. I kept the best one (despite all the fuel problems) and the others were sold to Sydney, Melbourne and not sure where the other one went. Having said that, I am back up to 10 (not to mention the scooter and Honda Fireblade) so it might be time to rationalise again ! I am finally getting everything running again, so it might be harder to sell something.
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  #40  
Old 24th August 2013, 07:55 PM
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Default Re: 6.9 # 7114 - it lives !

Good news ! The red 6.9 lives again. I completed the re-assembly of the injection system this morning, changed the fuel filter, fixed a small leak from the main tank hose, bled the injectors, cranked it over and hey presto, it burst into life and runs quite smoothly. Better than it ever has it seems. Very smooth when revving. Have a few things to do tomorrow, such as fixing a small water leak from the air slide, but once that is done, I will run it up to temperature and see how it settles down to idle. I might even take it around the block and see how it goes.
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  #41  
Old 25th August 2013, 07:59 AM
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Default Re: 6.9 # 7114 - it lives !

Hi Craig, that is great news. It's always satisfying to get a good result after doing all the work and the money you have spent. Mind you, I do think that the car will need a decent run to shake out any gremlins that may still be lurking in the background.

Talking about taking cars for a shake-out run and not experiencing any niggling problems, can be extremely satisfying. I have carried out two valve grind and de-coke jobs on GB and also my Astral Silver 6.9 that ChrisP. bought, and not a single oil or water leak from either engine. Also, be careful when taking your car for a "run around the block" - cops are never that far away in our area. Regards, Styria
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  #42  
Old 25th August 2013, 08:32 AM
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Default Re: 6.9 # 7114 - it lives !

What great news! How exactly did you bleed the injectors? I've come to realize there's lots of problems caused by bad fuel in old cars and it pays to use it well before it goes off
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01 Ford AU 5L (Deep Blue)
89 560L#322020
88 500L#451660-P
88 420L#422477-P
87 420L#324309-P
87 420L#-P
88 420L Euro#-P
88 420L#-P
86 560L#235896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora)
77 450L#067010-P
75 450L#028414 (Gold Nugget)-P
57 Buick 73A (Titanic)
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  #43  
Old 25th August 2013, 08:54 AM
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Default Re: 6.9 # 7114 - it lives !

Nice to read the good news Craig.
You know I have a soft spot for #7114...

Maybe we'll see it at the GTG?
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  #44  
Old 25th August 2013, 03:03 PM
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Default Re: 6.9 # 7114 - it lives !

Good news!
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  #45  
Old 25th August 2013, 05:50 PM
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Default Re: 6.9 # 7114 - it lives !

Quote:
Originally Posted by Oversize View Post
What great news! How exactly did you bleed the injectors? I've come to realize there's lots of problems caused by bad fuel in old cars and it pays to use it well before it goes off
Just need to turn the key on, disconnect the fuel safety switch, then crack open the injectors until they start to dribble. Easy !
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