Well, just so everyone knows, I did use the search function...

Here goes,

I adjusted the valves on my 84 300SD on Saturday to eliminate the smoke and power loss issues. Success!!!

Problem... I still have a rough idle. Well, looking back, I think my inexperience on these engines might be showing itself. What remember seeing was that the timing chain seemed loose. I did not think much of it at the time, but I could move it about 1/2 an inch to either side. I think that this might explain some of the noise I am hearing from under the hood, and also that wierd "rough spot" while under mild deceleration.

What think ye? Timing chain replacement?

BTW, I am using the DIY procedures from this link. http://dieselgiant.com

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84 300SD

You might need a new chain, do you know how many miles are on the engine? But I would think the looseness on the chain that you see is caused more by a bad tensioner then a worn out chain. Better keep checking and I am sure you will get many good ideas from the people here.

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Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!

Check the cam timing using the 2mm lift method.
Check injection timing using the drip tube.
Pull you injectors have them poptested and inspect your prechambers.

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1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42