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617 turbo valve adjustment lobe position
I adjusted the valves last night on my 83 300D. I reviewed old ShopForum threads as well as threads all over the web.
I have two questions: 1.When I position the lobe at "1 o'clock" does the tip of the lobe point to the driver's side or passenger side of the car? My MB service manual says: "positioning the camshaft so that the tip of the cam is vertical relative to the rocker arm." but the picture in the manual does not show the tip or lobe on on the camshaft in the diagram. Diesel Giant says: "To your eye this will look like the lobe is in about the 1 o'clock position" but the tip of the camshaft lobe in his picture looks to me like it is pointing toward the passenger side of the vehicle, (the engine he is working on is a 617 non-turbo). 2.Can I lube the linkage with regular wheel bearing grease after I clean them? Thanks for the help. I have two more valve adjustments to go. Bob |
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I stood on the drivers side using a bump starter and positioned the lobe as pictured here, which would be also pointing to the drivers side
I used trans fluid to lube the linkage |
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Bob |
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However, there were a couple of members who noted a difference in readings when the cam was moved from 12:00 to 1:00...........so, YMMV. As Gauge mentioned, if you use the 1:00 position, it's toward the driver's side. |
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Thanks for the feedback Guage, I interpreted things just as you.
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I think I have read every thread on ShopForum and the rest of the net and understood there was some varied opinions. I intentionally did this on my junker 300D before working on two cars with good engines. I was a little disappointed after I finished the job because the car still has really poor compression and wanted to make sure I did the procedure correctly. The valves on the car had no clearance prior to adjustment so I was hoping for the best. Bob |
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..........there goes the compression......... |
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Just to muddy the waters a little, this is the conversation I had on another fourm.
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............mechanics.......... |
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Had I known... while mine was apart.....I would have used a dial indicator to read the base of the lobe to see if there is a difference and if so...where the "sweet spot" is.
__________________
1980 300TD-T (82 Turbo and Trans) 159,000 Miles "Jackie-O" 1983 300SD 272,000 Miles "Aristotle" 1987 Jeep Wagoneer Limited - keeps the MB's off the ice and out of the snow 1994 BMW 530it |
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Wouldn't all of the cam lobe have to be equal except for the point with the lobe? If it was not all equal it would slightly open the valve during its travel, which would not be good. So I bet having it at 12 o'clock or 1 o'clock etc....doesn't matter. I usually do it with it at 180 degrees all the same though, its easiest.
__________________
-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
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__________________
1989 300E 144K |
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You better hope it's not .002". That's 1/2 the clearance of the intake valve.
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