Adjusting Valves - 'Stuck' on Fifth - Mercedes-Benz Forum

 
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post #1 of 8 (permalink) Old 10-14-2008, 11:53 AM Thread Starter
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Adjusting Valves - 'Stuck' on Fifth

I did the other four sets of valves just fine with no problems except for four which seemed like it took forever the tighten and this is where I am at with number 5 (exhaust). I wrenched on it last night for about an hour and it seemed like it still wouldn't tighten. I noticed the spring was spinning as I tightened it. I had my other springs spin too but I still have no clearance difference since starting on this valve. I need some ideas here.

Thanks,
Charlane
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post #2 of 8 (permalink) Old 10-21-2008, 11:27 AM Thread Starter
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What, no one wants to answer me? I didn't ask anyone to do this for me. I have my own tools and have lifted a few engines in my life. I just asked for some advice. It looks like I might have a strip and have to take out the camshaft to get under.

Can anyone pause for a minute to respond?
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post #3 of 8 (permalink) Old 10-21-2008, 11:33 AM
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Originally Posted by Charlane View Post
What, no one wants to answer me? I didn't ask anyone to do this for me. I have my own tools and have lifted a few engines in my life. I just asked for some advice. It looks like I might have a strip and have to take out the camshaft to get under.

Can anyone pause for a minute to respond?
You do realize that from your post there is no way to tell if you're working on a 1936 170V or a 2008 CL600, don't you?

Felicita e un bicchiere di vino con un panino.
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post #4 of 8 (permalink) Old 10-21-2008, 12:05 PM Thread Starter
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A valve is a valve and it's obvious that I have an overhead camshaft.
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post #5 of 8 (permalink) Old 10-21-2008, 12:13 PM
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A valve is not a valve.

Example: While setting the valves may appear to be the same across all engine families, that is only in theory. Real world is a different story. The procedure for doing valves on a M110 6 cylinder and a OM617 diesel, while similar, are not 100% identical.

Tell us what you are working with if you really want to get a answer that applies to your situation.
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post #6 of 8 (permalink) Old 10-21-2008, 01:00 PM
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A valve is a valve and it's obvious that I have an overhead camshaft.
Actually, even that much isn't immediately obvious, but it seems like the particular model you drive is a matter of national security which you aren't at liberty to disclose. I respect that and wish you the best of luck.

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post #7 of 8 (permalink) Old 10-21-2008, 06:30 PM Thread Starter
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Quote:
Originally Posted by sbaert View Post
A valve is not a valve.

Example: While setting the valves may appear to be the same across all engine families, that is only in theory. Real world is a different story. The procedure for doing valves on a M110 6 cylinder and a OM617 diesel, while similar, are not 100% identical.

Tell us what you are working with if you really want to get a answer that applies to your situation.
Ok. . It's either a '79 or '80 300D engine in a '77 chassis. NOT turbo. Definitely 123 series. Sturdy car and love Mercedes to pieces and sometimes it's to pieces that I have to love these. I have done a lot of TLC and the seats are pretty with a nice sound system and paint job. Electric all around. Really great car.

I have to admit, I am not that versed at diesel. I have yanked Volvo, Chevy and my old Porsche motors out, but I didn't get all that involved in my Mercedes diesel engine work....didn't have to until now. And this is my second one. I sold the last one because I had too many cars....missed it and went and got another one. I even tried to buy back my old one but they took it to Florida.

Regardless, I have 5 sets of exhaust lobes and 5 sets of intake lobes. I used dieselgiant's steps and it was really great. I could feel the crankshaft turning easier the more lobes I cleared. But that number five...I spent more than an hour wrenching on it and it just spun and went nowhere and I am sure that it is stripped. My back was killing me on that one. My family is used to me taking stuff apart and putting it back together again...and have it work. They just kind of ignore my projects.

So, now I have to figure on releasing pressure evenly on the camshaft, as I have broke one before by not cross-sequencing the release and then figure out how in the hell I am going to replace that stripped piece. I mean before when I did my Chevy seals, I used my valve spring compressor after I moved the valve up and stuck a bunch of nylon rope, instead of compressed air, in the plug well so that I wouldn't lose any pieces. I have to read my book on this one.....after I find it.

Any tips are greatly appreciated.
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post #8 of 8 (permalink) Old 11-07-2008, 02:53 PM
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There is a special wrench for holding to keep the valve from spinning when you adjust them.

Len
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