Couple questions about my 69 220 - Mercedes-Benz Forum

 
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post #1 of 5 (permalink) Old 02-15-2010, 09:54 PM Thread Starter
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Couple questions about my 69 220

So I just picked up a 69 220 & it needs a little TLC. The valves need adjusting, & I was wondering if there are any step by step instructions to do this. I tried searching the forum with no luck.. Also, I need to replace the flasher, couldn't find it under the dash, does anyone know where its located? Thanks for any input!
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post #2 of 5 (permalink) Old 02-16-2010, 09:32 AM
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The valve settings are .004 and .008 US cold. With valve cover removed you will set each valve with the lobe being opposite the cam follower contact point. You will rotate the engine watching the next lobe come up and setting that valve. Mark each valve after done with a suitable marker so none get missed. the contact point of the adjuster wears into a sort of point so after turning the adjuster strike the top of the follower just above the adjuster to settle it for accuracy. With gauge inserted you will tighten the adjuster until the gauge is tight or snug and strike it as directed. If the gauge is loosened repeat the step until it no longer loosens. Loosen the adjuster a quarter turn and recheck setting, it should be acceptable. A little loose is way better than tight. You can turn the engine with a wrench at the crankshaft or you can locate a purple wire in .... heck I don't remember but it should be in a relay plug on the firewall, remember it is lavender in color. If you disconnect the plug wires for removal prior to the process ground the secondary or high tension wire from the coil. A 69 may be pre transistor ign. but if not the coil needs to be grounded. Good luck
Bill
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post #3 of 5 (permalink) Old 02-17-2010, 07:57 AM
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If you pull the plugs and you have power steering you can usually turn the engine over by using the nut on the front of the power steering pump. Turn the engine in proper rotation direction! If you pass the adjusting position then turn it all the way around. Do NOT turn an engine this old backwards because of the possibility of jumping the timing chain.

The engine turns clockwise (facing the engine from the front).

I use a set of clothespins to designate which valve I have adjusted. This allows you to jump around to set the clearance with minimal number of turns.
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post #4 of 5 (permalink) Old 02-22-2010, 07:16 PM Thread Starter
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Thanks for the detailed explanation, one more question.. The adjuster is located below the rocker? I have worked on many domestic OHV engines, this is my first OHC experience. Thanks again for any help!

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Originally Posted by Bill A View Post
The valve settings are .004 and .008 US cold. With valve cover removed you will set each valve with the lobe being opposite the cam follower contact point. You will rotate the engine watching the next lobe come up and setting that valve. Mark each valve after done with a suitable marker so none get missed. the contact point of the adjuster wears into a sort of point so after turning the adjuster strike the top of the follower just above the adjuster to settle it for accuracy. With gauge inserted you will tighten the adjuster until the gauge is tight or snug and strike it as directed. If the gauge is loosened repeat the step until it no longer loosens. Loosen the adjuster a quarter turn and recheck setting, it should be acceptable. A little loose is way better than tight. You can turn the engine with a wrench at the crankshaft or you can locate a purple wire in .... heck I don't remember but it should be in a relay plug on the firewall, remember it is lavender in color. If you disconnect the plug wires for removal prior to the process ground the secondary or high tension wire from the coil. A 69 may be pre transistor ign. but if not the coil needs to be grounded. Good luck
Bill
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post #5 of 5 (permalink) Old 02-22-2010, 07:39 PM
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think of a teeter totter, position 1 is the valve, position 2 is the cam shaft but above and 3 is the adjuster. The cam travels above the other two items, the adjuster is 17 mm on later engines and 14 mm on earlier. You will find the tool is made of unobtanium so a 17 mm snap on crows foot will work in a pinch.
Good luck, Bill
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