Mercedes-Benz Forum banner

1 - 3 of 3 Posts

·
Registered
'97 E300
Joined
·
127 Posts
Discussion Starter #1
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
 

·
Registered
90 300 SE ,85 300 GD
Joined
·
1,574 Posts
Tink Noise in Engine

Do you have any idea what kind of oil is in the engine? There has been some major discussion about synthetic oil versus petroleum distillate oil in this engine. If the engine was broken in with the old oil and then changed to Mobil 1, you may have a serious problem. Check your service book for oil service records. You know diesels so you know what a valve sticking sounds like. What about the timing? If you lost power at higher RPM's the timing may be off too.
 

·
Registered
'97 E300
Joined
·
127 Posts
Discussion Starter #3
Tink Noise in Engine

Based on the maintainence records it's been dino oil all the way... Not even Rotella from what I see...Sad... IT pulls nicely up to 3000 rpm... I should be gettin' it registered soon so I'll take it to my mechanic. Hopefully it's just some bad injectors. The rusted fuel cap tells me this. As a matter of oils, I'm gonna try running the Rotella 15w-40 for 3000 miles then switch to the Delvac, or I might do it sooner... What you guys think?
 
1 - 3 of 3 Posts
Top