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post #31 of 68 (permalink) Old 05-14-2015, 07:08 PM
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Thanks, all. I'm stoked about it.

I will attempt to spin the motor soon. For now, I'm soaking the cylinders with WD40 through the spark plug openings. I really don't want to take the radiator out to get to the crank bolt. Maybe I can get to it from underneath. Any best practices out there?
It is kinda close in there. Depending on the car I have removed the plugs and turned the engine using an alternator pulley nut, I have removed the valve cover and used a 22mm wrench on the cam gear bolt being careful not to collapse the tensioner so pull a bit and relax the chain and repeat, you will be trying to break the engine loose if it doesn't want to turn. If it's too tight you can get under it and try a short socket on the crankshaft pulley bolt or you can use a wide blade screwdriver and carefully turn the engine at the torque converter through the cast grate on the bottom. CAREFUL not to break the grate because I don't want to hear hollering. If you soak the cylinders with penetrant oil it will likely turn over without too much trouble. Isn't learning a fun thing.
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post #32 of 68 (permalink) Old 05-14-2015, 08:38 PM Thread Starter
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It is kinda close in there. Depending on the car I have removed the plugs and turned the engine using an alternator pulley nut, I have removed the valve cover and used a 22mm wrench on the cam gear bolt being careful not to collapse the tensioner so pull a bit and relax the chain and repeat, you will be trying to break the engine loose if it doesn't want to turn. If it's too tight you can get under it and try a short socket on the crankshaft pulley bolt or you can use a wide blade screwdriver and carefully turn the engine at the torque converter through the cast grate on the bottom. CAREFUL not to break the grate because I don't want to hear hollering. If you soak the cylinders with penetrant oil it will likely turn over without too much trouble. Isn't learning a fun thing.
Indeed, Bill. Loving every minute of it. Thank you for the turn-over tips!

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1985 W126 300SD
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post #33 of 68 (permalink) Old 05-14-2015, 08:42 PM Thread Starter
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While I'm under the hood, I'm noticing lots of vacuum lines broken and truncated. Shocker, I know. Is there a vacuum diagram for the whole car out there floating around?

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post #34 of 68 (permalink) Old 05-14-2015, 09:01 PM
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While I'm under the hood, I'm noticing lots of vacuum lines broken and truncated. Shocker, I know. Is there a vacuum diagram for the whole car out there floating around?
I'm sure there is, i know there's a forum here that has a lot of technical info. I stumbled onto it a couple of weeks ago. I'm going to be gone for a few days but if you don't find it we'll see. I donated most all of my library to our public library a couple of weeks ago of I'd just copy a page. The Fullerton library has one....
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post #35 of 68 (permalink) Old 05-15-2015, 07:50 AM Thread Starter
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I'm sure there is, i know there's a forum here that has a lot of technical info. I stumbled onto it a couple of weeks ago. I'm going to be gone for a few days but if you don't find it we'll see. I donated most all of my library to our public library a couple of weeks ago of I'd just copy a page. The Fullerton library has one....

I ordered this from Amazon to get me started.
My "New" '72 w114 250-imageuploadedbyag-free1431697797.473107.jpg


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post #36 of 68 (permalink) Old 05-15-2015, 10:42 AM Thread Starter
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How do get this plug out? Do I have to remove the distributor?
My "New" '72 w114 250-imageuploadedbyag-free1431708169.372765.jpg


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post #37 of 68 (permalink) Old 05-15-2015, 10:44 AM
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Not sure on your car, my 250S I can get to the crank bolt with a big socket, and a @3" extension. just enough room to use a ratchet handle to turn it.

Here is the carb manual again
Mercedes Benz Zenith Carb Manual | JaimeKop.com

WD40 is OK, trans fluid and acetone maybe a bit better, also it burns off nicely.

The cure for the common stuck bolt. | IH8MUD Forum
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post #38 of 68 (permalink) Old 05-15-2015, 03:24 PM
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i have a spark plug socket that you can put a box wrench on the end. or will a wiggle (universal)joint work?


[QUOTE=Big Daddy Benz;12048681]How do get this plug out? Do I have to remove the distributor?
Attachment 1439553


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post #39 of 68 (permalink) Old 05-15-2015, 06:35 PM Thread Starter
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i have a spark plug socket that you can put a box wrench on the end. or will a wiggle (universal)joint work?
Duh. I didn't even think of using a box wrench. There was no way to get a wiggle joint on there. I'll give the box wrench a try. Thanks!

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post #40 of 68 (permalink) Old 05-15-2015, 06:40 PM Thread Starter
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Not sure on your car, my 250S I can get to the crank bolt with a big socket, and a @3" extension. just enough room to use a ratchet handle to turn it.
From the top or from the bottom?

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WD40 is OK, trans fluid and acetone maybe a bit better, also it burns off nicely.
I have some lacquer thinner on hand. See any reason not to use that instead of acetone or is there some important property that acetone has other than it being a solvent?

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