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Started by andrewk, 18 October 2022, 07:38 AM
Quote from: gurrier on 05 January 2023, 05:19 AMHugely interesting thread for even such as myself with a 350SE- keep up the good work.
Quote from: BCK1963 on 05 January 2023, 06:24 AMAndrew,regarding the hydraulic oil system: There is a little filter located underneath the valve unit on top of the oil reservoir. I had changed mine when I removed the reservoir for cleaning. Interested to hear what the crystalline crap in the fule line will turn out to be. Did you already do solubility tests? You won't get rust through the GC column :-).Is it just by chance or do 6.9s have a particular attractivity for chemistry-related folks? Bernd
Quote from: rumb on 05 January 2023, 11:27 AMThe engine wire harness I repaired by cutting it off back along the fire wall. After removing sheathing I cut the wires all offset a bit from each other. I then used non-insulated butt crimp connectors (they are smaller diameter than insulated ones) and covered in shrink tubing.To take apart the harness you need to work from the ends. Removed the connector housing and unsolder the pins. For the Bosch fuel injector connector and boot you can buy those on autohaus.com and elsewhere. New pins and sockets are avail from MBTake photos and make drawings of everything.https://www.autohausaz.com/pn/1287013003Re-assemble by making the butt connectors and then slide new sheathing on as you go and branch out to the other legs with smaller tubing. The re-solder the end connectors.These are the tubings still avail from MB:N040621005200N040621007200N040621008200N040621012200N040621016200N040621022200N040621025200the 4-5 from last digits are the size.I have extra lengths of most wire colors if you need some. Let me know the colors and lengths you need.
Quote from: raueda1 on 05 January 2023, 08:02 PMI went through this but I don't think I posted the details. So, these may help. I just looked at old harness and used same gauge wire torn out of another car. Nothing special about it though maintaining the look is certainly nice. Cheers,-----------------quick edit to clarify more:The pins are looking DOWN onto the connectors. The index tab on the plugs is shown. I made it so the whole thing could be unplugged next time I have to pull the engine (hopefully never, but who knows?). That plug is just build arouund the standard MB 6-pin plug. The harness has 7 wires so I just used a single pin plug for one of them as illustrated. Dimensions are from the point where the wires exit the main wiring loom. The black cover was just pvc tubing, not shrink stuff. I did use shrink tubing on a couple places. You can see it on the pic. Doing this may be slightly preventative. I found that LOT of the wires had bad or cracked insulation. Just a problem waiting to happen.
Quote from: andrewk on 06 January 2023, 10:42 AMTHANK YOU very much. This is essentially what I had planned to draw up and document, but you have really got every detail needed to rebuild the harness on your drawing - it saves a huge amount of time. I'll check some Bosch part numbers for each type of connector and post them. These old wiring harnesses are definitely a hazard, especially the K jetronic system components and safety fuel cutoff. Thank you everyone for your assistance - I could not do this without your knowledge and guidance.
Quote from: raueda1 on 06 January 2023, 11:33 AMQuote from: andrewk on 06 January 2023, 10:42 AMTHANK YOU very much. This is essentially what I had planned to draw up and document, but you have really got every detail needed to rebuild the harness on your drawing - it saves a huge amount of time. I'll check some Bosch part numbers for each type of connector and post them. These old wiring harnesses are definitely a hazard, especially the K jetronic system components and safety fuel cutoff. Thank you everyone for your assistance - I could not do this without your knowledge and guidance. Glad it's helpful. FWIW, I found the connectors to be pretty robust, especially the ones with round pins. They seem to be glass filled melamine or bakelite or something like that. Most of mine got reused after cleaning up, desoldering etc. Then a few came off a parts car. I wouldn't have any qualms about reusing them unless they're very discolored, cracked etc. But if you get new that's always best! I did replace all the rubber boots, they don't fare as well. Cheers,
Quote from: Jan S on 08 January 2023, 07:17 PMThose fittings are a nightmare! One of the fittings on my car was ... argh! I gave up and had to bring it to a workshop. They used a considerable amount of heat to separate.Please tell us more about the tank, the cleaning and coating process. I've heard mixed stories when the tank has been coated ... some say that after a while the coating falls off and lands in the fuel system. It all depends on the quality of work and the coating process, I guess. Hence would be interesting to learn more about this.
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