Join Date: Mar 2004
Location: Paola, Kansas
Thanked 0 Times in 0 Posts
Help; Engine rumbles above 4K RPM; progressing
My daily driver Sammy ('87 stock 1.3) is developing a motor problem. I drive it around the 4000-4500 rpm range on the highway, because I have 29 tall tires and shifting back and forth to 5th gear doesn't work very well. The engine has started moaning/rumbling above 3900 rpm. The sound happens going uphill, when the motor is under load. It uses a quart of oil every 1500 miles, does not smoke, and it's not losing power. Oil pressure is normal. At idle, the engine does not knock, it makes a valve train clatter, like it always has (I've got the valve lash set at .006 or is .06?) At idle, I can hear a little exhaust leak around the bisket or manifold gasket. Any way, the problem seems to be getting worse, I can feel a roughness/vibration starting at 3500 rpm on up. I don't think the problem is in the bottom end, could it be a valve? Sorry for the information dump, but I depend on this vehicle to get to work, I don't want to end up walkin' down the highway again (the water pump shelled last week).