Engine Mechanical problem
1990 Toyota Pickup 4 cyl Four Wheel Drive Manual 178000 miles
My truck always made a slight knocking noise that got louder as I let off the accelerator. I always assumed it was a badly adjusted valve. Recently, while climbing it got a lot louder. I pulled the valve cover off expecting to find a loose valve stem nut. They were all still tight. I drove another 15 miles when I heard a huge bang and the wheels locked up for a second. The knocking noise was now gone. I started heading for home when the car did the same thing a few more times. I pulled over and called for a tow truck. I tore the engine apart and cannot find any damage. The top end seems find and the rods are not broken the bearings on the cam shaft also seem ok. When I crank the engine by hand the pistons move freely with no strange noises. Any ideas?
Monday, September 1st, 2008 AT 10:09 PM