I don't know why they are being listed for the UniMog. The listing does go on to mention the 615 and 616 engine. Far as I can tell from the set I have they will work just fine on the 617 - my plans are to confirm that this evening. We're getting a break from the hot weather at last.

Valve cover is off. Wrenches and crankshaft socket ready to go to work.

Ken300D

Ken300D, I'm going to attempt adjusting my valve's as well. Let us know if the wrenches work.

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2012 550CLS
1982 380SL
1985 300D
1998 ML-320
1997 E-320
1984 380SE

Alright, I have now located the crankshaft pulley, but there's one problem... how can I get to it with the fan in the way? There's no way I can get a socket wrench down there. What do I do now?

I have turned the crank pulley with the fan/shroud in place on the 1983 240D but it is cumbersome. Another alternative is to take the fan off and then you have alot better access to the crank bolt.
I did get confirmation that the Unimog valve wrenches will be fine.

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Jim

Yes the wrenches fit the job very nicely. All of my valves were a little too tight except for an intake near the middle. I got as far as getting the valve cover back on with a new gasket and gave up for the day. Will be interesting to see if I can tell any change in engine noise with looser valves.

I had no problem using the deep 27mm socket Performance Products sells as an "injector socket" on the crankshaft bolt - but you need to access it from underneath. Don't have to lift the car or anything, but get underneath enough to put the socket on and then a wrench. The crank bolt is pretty far back in the pully, so the 1/2" socket wrench nicely clears all the obstructions. The pain is estimating how far to turn the crank before getting back up to see if a valve cam is in the proper position.

Also took the time to check timing chain stretch. It's a guess but it seems to be about 3 degrees. Wow, at 325K it must have been replaced already to be that tight.

I've bought a number of tools from Samstag on EBay and they are good sellers with timely shipment.

Ken300D

So I have to access the crankshaft bolt from underneath then jump up and check for the proper position of the camshaft... sounds like fun :p

After you do a few valves, if you do them in zundfolge ( firing order) you will get to know how many clicks on your ratchet it takes to position the camshaft for the next valve.

I think it was 4 clicks on my ratchet so you can see you don't have to turn the crankshaft very far each time.

P E H