Hi!

I searched through the old posts regarding idle shake idle shaking dampener rack, etc.

The problem is that my car shakes side to side only once the engine is warm. It was really bad one day when it was hot. I thought it was the temperature. However after two bottles of the cheap STP Diesel 'stuff' it got better.

The thing that I still hope for is well "bad fuel quality" because it didn't do this before. Only after that full tank of 'new' diesel fuel.

I ran a full bottle of RedLine DFC through it and it isn't bad now however it's still there. Strange thing is that it does it only once in five or so occasions (at traffic lights, jams, etc.)
At other times it could be silky smooth.

I have come to these conclusions...

1. It could be caused by a low compression in one of the cylinders? I do not think it is because the engine is so strong (I think at least) and I did that "diesel test" by building up the pressure and letting the engine choke and die.. - my engine died in about 10/11 seconds.

2. most people think it's rack dampener bolt. I tried to look for it. I found something near the oil filter at the back of the injector. Does it look like the drawing i attached? I tried to move it but I couldn't move it either way so I left it alone. Is it the right part?

It looked screwed in and there is a small gap (about 1 to 1.5mm between the big nut and the small nut).I'll play around with it tomorrow, but I can't do anything today.

3. Engine mounts? I tend to believe that I need to replace 'em only when the engine shuts off hard and makes 'metal-metal' sound when it shuts off (It did with the W124)

4. Engine shocks? I never heard of 'em... I'll ask this guy at an MB shop on Monday about it. See what he thinks.

5. Valve adjustments? I'm going to get this done anyway.


Am I missing anything? I'm sorry to post this again. However i think it's not too bad since I think I've summed up what most people say about "rockin' 300ds"

The fuel return lines are also leaking (I'll replace 'em on Monday), could that be it?

I'll play around with the rack dampener tomorrow and I'll update it. I figured that I need to loosen the bigger nut before I can adjust the smaller nut.. but I could barely see now.

Cheers,

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2008 BMW 335i Coupe