michakaveli

Howdy all... Recently picked up a 97 E300 non-turbo diesel and now has 123k. At idle approx. 600rpm there is an occasional "tink" noise from the engine. When you bring up the rpm's to 1000 it becomes constant and a lot louder. After about 1500 rpm the noise dicipates off and by 2000 rpm and higher the engine sounds nice and smooth. When I was testing it out it had this noise (I am assuming that it is an injector(s) that need some TLC). I drove it back home, about 650 mile trip and in the middle of the trip at a rest stop I noticed that the noise was gone (mind you the car had been running on cruise at 70mph for quite a while). Is my assumption applicable? The gas car is rusted on the inside, showing neglect from that aspect. We have an '82 300D that had a similar "nailing" sound when it was cold, that's why I'm assuming an injector. What you guys think? BTW, on the drive home I was getting just under 34mpg, if that helps any.
Thanx in Advance, Chris

chupper

hmm...

I've noticed this on my 89 300E, and this just recently started on my 96 G320...

Lightman

I'd have the diagnostics machine hooked up and check the injectors and glowplugs. Also try to find a source for premium diesel fuel, or b20 biodiesel mixes. Run additives in every tank, such as powerservice diesel fuel supplement(winter) and Diesel kleen(summer), or stanadyne performance formula year round.

DMOODY

I ALSO HAVE A 97 E300D! THIS PROBLEM IS ADDRESSED IN SEVERAL MB TSB'S!!! I JOINED ALLDATA.COM WHICH GIVES ME ACCESS TO ALL TSB FOR MY CAR, IT'S CHEAP YOU SHOULD DO THE SAME. LOTS OF GOOD INFO!!!

TSB DDAF27_00-U-119 NOV 96: KNOCKING NOISE THAT CHANGES WITH ENGINE LOAD

CAUSE: NOISE IS GENERATED BY THE OUTPUTSHAFT FLANGE AND OUTPUTSHAFT FLANGE NUT (NEW NUT IS GOLD COLORED FOR IDENTIFICATION)

REMEDY: REPLACE OUTPUTSHAFT NUT AND TORQUE OUTPUTSHAFT NUT TO 200 Nm

PER MB TSB
I HOPE THIS HELPS, CHECK OUT ALLDATA.COM!! IT'S BEEN THE BEST $24.95 I'VE SPENT YET!!!