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#1
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1986 300E driveline thrumming:resolution
Some time back I reported a steady, pulsing, thrumming which I felt in the steering wheel of my 86, 300E from about 45 to 55 MPH. The other day, after returning from the city, the red, oil warning light came on, I checked the oil level and it was down 1 1/2 litres(quarts to U.S. friends). Due to being busy I had not added any oil for 3,500 miles and it was down, alright. After adding the oil and driving back onto the highway, I noticed that the thrumming had disappeared and has not reappeared. Question: Could that have been due to the trochoid pump and that the engine oil level was a bit too low? If not, then I am baffled--still! All other checks came up ok!
Al Hardy on Vancouver Island |
#2
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a....don't know too much about 300e yet, but being 1 1/2 quarts low on oil will have a negative effect on any car over a period of time and may or may not cause any kind of noise to react to.
__________________
87 300e Got a great deal on this car I think? 5/5/03 Hit and run victim. Someone back into my car while I was in the back. Need a grill and grill trim. |
#3
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My guess would be that the oil level didn't have much to do with your vibration problem... It's a quart and a half (or so, maybe a quart) before the low oil light comes on, and two quarts between the min and max levels on the dipstick. It will run fine when it's down a quart or two. I've heard the engine will even be okay with less oil than that, but DON'T take my word for it...
Incidentally, your thrumming problem sounds like a wheel balance issue. I had some significant vibration through my steering wheel for awhile, and a tire rotate + 4 wheel balance made it seriously better (though not entirely smooth). Also, my low oil light is yellow. Are the Canada cars different? -anthony |
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