1985 Mercedes 300CD Part 4 - w123 Valve Adjustment, Cleaning Throttle Linkage and Valve Cover
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/ woodsandbarclay This is a very detailed video showing how to disassemble the throttle linkage, clean everything, do a valve adjustment and reassemble. This is a very rare 1985 Mercedes 300CD, there were roughly 1200 made in 1985. At only 56,000 original miles, 1 owner, and Smoke Silver with Black interior this is the holy grail of 300CD's!!!
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404-200-3942
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Don’t worry about the length. That’s what scrubbing is for. These are gold! You are quickly becoming a pillar in the world of classic Mercedes vehicles.
Thank you!!!
Kent Bergsma made a throttle linkage removal tool that works pretty well.
You do not need a throttle linkage removal tool.
Beautiful! Love the attention to details! Risky to leave the oil cap off while putting back the c clips, one could have flown in there! Haha
Oh my God don't say that that would have been a disaster!!!!
Amazing video, thanks for sharing. We don't see 300CDs very often on my side of the Pond (my Dad owns a 230CE, which is the most common one here), great condition!
Thank you so glad you're enjoying the videos
I've owned mercedes diesels since 1984, do all my own work.
That's awesome it's very rewarding!
Thank you so much for this! I also have a 1985 300CD and am planning to do my first valve adjustment next weekend. Much appreciated! :-)
It's not hard just take your time and don't rush. It'll take you three or four valves before you get the "feel" for it and how to make the adjustment.
I tell you your work it just flawless brother!
Thank you I really put my heart and soul into it and love doing it!
You are my hero
Hahaha thank you for the compliment
Excellent work ..
Thank you Al
Thank you Al
Do you mark the linkages to keep track of which ones go where? I’m afraid I would mix them up.
No I do not mark them it's not really that complicated just take a couple of pictures before you disassemble it.
Great video, very informative
Thank you Phil I appreciate that I was nervous about how long this one was.
@@woodsandbarclay These videos are priceless for anyone wanting to try to do these jobs themselves.
Very good video
Thank you I really appreciate the compliment. It's very time consuming to record everything and make these videos so I'm glad they're helping out a lot of people.
Many thanks for your videos. Amazing detailed work.
Hug from spain!
I'm so glad you're enjoying the videos thank you for the compliment
@@woodsandbarclay I have a s123 tdt since a couple of years and I have to do work on it (with this Corona time and so I’ was not able to do as much as I wanted ~ because I needed to travel with it to another place before starting doing things)
Not so much people knows about that car and I’ve been reading a lot and I had tons of doubts but seeing your videos is so clear.
So I really appreciate the time you spend doing each video.
Thank you for the info
Glad it was helpful!
make them longer 💝🥰 youre the greatest
Thanks I was really nervous about how long this one was and was worried it was a little too technical.
the lobes are centered at 1:Oclock, not 12 0clock
for .10 mm, you want it at 1 o'clock, as per factory service manual
Either of those positions will suffice. The valve adjustment on this car was done absolutely correctly. If you look at the base of the lobe in the 12:00 or 1:00 position you will see that the same radius is touching the rocker.
Hi
Did you manage to have a video adressing the engine bay, explaining all the vacuum lines and connectors for this 85 version...
Im really having problems with mine....
Hey buddy I I know you need this video but the videos I make are the actual restorations of the cars I'm working on. Currently we do not have any 85 models that we need to restore the vacuum system on and we're swamped with seven cars right now. However Pierre hadary just wrote an article in the Mercedes-Benz club of America Star magazine explaining in detail the 85 vacuum system.
Thank you, for your quick reply.
I fully understand.
Can you share the link to that article? I cant find it....
@@pedromonteiro1359 There is no link it is in the star magazine. That's the MBCA magazine. I'm sorry buddy I don't really have any more details on that you're going to have to get on line or grab a service manual and study your vacuum system I just simply don't have time to make independent videos for people.
@@pedromonteiro1359 what is your email address I was able to get the contents of the article from Pierre and I can email it to you. You can get my email from the website. www.woodsandbarclay.com
@@woodsandbarclay hi
I have sent you my email
Really apreciate your help
You are the men!
How much kg tighten valve cover seal?
It's not much only about 10 ft lbs
After I did the valve lash, valve cover and linkage setting, the idle jumped up around 100 or so (by ear), I don’t have a digital timing light to check Rpms that way. I tried adjusting the idle set screw on the IP that pushes the throttle linkage up and down. but it didn’t do anything as far as I can tell, did not touch it once before. before I take out the set screw, degum and clean it up, any ideas as to the where the rpm jump may have came from? I blocked off the egr vacuum line and I’ll try that soon, but I’m unsure if that’s what could be causing it. Maybe the connecting bolt from the accelerator pedal link shaft to the linkage itself? Would appreciate any ideas. Merry Christmas!
What is your rpm? Maybe the valve adjustment put things back to where it is suppose to be.
@@woodsandbarclay it seems around 750-800, which from my searching seems to be within reason of regular idle rpm, before it “felt” like 650, a few degrees past the tach on 5~ which seems to be the average “worn” om617 idle with everything running on it. I don’t have the a/c clutch on, and haven’t tried it yet seeing as I’m the third owner and it’s winter atm. I started it up again after letting it get cold and it seemed to settle down a bit so maybe I’m jumping the gun for nothing, it’s my first mechanical diesel so I’m getting used to the ins and outs of the motor itself, i was curious about other peoples’ experience with them : )
Edit: I should mention near 0 blowby, no cap vibration when you let the oil fill loose, and overall sounds healthy, maybe you’re right that the valve lash set it better, intakes 2 and 3 were too tight and exhaust 3 and 4 were as well, so maybe it may have been the lash affecting the performance
Hi, I'm Eloy from Spain. Great job. I have a w123 300 TDT with a lot of lagging in the throttle linkage response. Did you some adjustment on throttle linkage parts?. Thanks and sorry for my english.
I would first check to make sure the line going from the back of the manifold to the alda is blown out with compressed air. Then make sure you have a clean air filter and a proper valve adjustment. Also make sure you have fresh fuel filters. After all that is done that is when you need to check the linkage.
@@woodsandbarclay Thanks, I'll check all of these things. I appreciate the advice.
Over time, between valve adjustments, the clearances will grow smaller, unless one of the lock nuts are loose. The tell tale is hard starting, because you end up with the intakes at zero clearance if you go more than 15K between adjustments.
Great feedback Steve!
15,000 mi is a little aggressive once the valves are set they usually hold in place and can be up to 30 to 35,000 MI on a good engine.
Great information and video. 👍👍
Awesome I'm glad you liked it!
Great video I love to see how the engine runs after the value adjustment. Any improvement on idle or acceleration?
Man this engine basically had a perfect setup I only made minor valve adjustments and there was really no change the engine was already performing top notch. I only think two of the valves were out just a couple of thousands so that's not enough to make a difference.
I'm going to attempt a valve adjustment on my 85' 300CD soon, and was wondering where you got those angled wrenches from?
I actually bought those from our buddy Kent over at mercedessource ;)
@@woodsandbarclay thanks for responding:)