STLDAVE
Member
I work during the day so I had my father take my 14 runner in for the 20k service. When he brought it back to me I immediately noticed a significant vibration while idling, accelerating and decelerating. I called the service dept and of course they're gone for the day. I checked the dipstick and the oil level appears to be several inches above the normal range. Would too much oil cause this?
Those are exactly the symptoms of overfilling. Be glad you decided to drain it. Had you let it set overnight the oil could have seeped past the rings to fill the cylinders. Then, when you tried to start it the piston gets part way up the cylinder and the oil hits the head. Since the oil isn't compressible, BANG! A sudden stop and a bent rod.
Saw the symptoms on my girl friends car once. The next morning I drained the oil (8 qts. in a 4qt engine). I then pulled the spark plugs, followed by hitting the starter. Oil shot out two of the spark plug holes like a fountain. If I hadn't done that she would have had one dead Mini.