1.   A car converted to unleaded petrol can also run on leaded with no risk of damaging the engine.

2.   A loose valve seat usually falls out totally and damages the engine very quickly.

3.   We felt sure that sooner or later a stone would rip a hole in our petrol tank or damage the engine.

4.   THE Government could face repair bills from thousands of motorists whose car engines have been damaged in tests on toxic emissions from diesel exhausts.

5.   Another possibility was hitting a flock of birds, which could damage the engines.

6.   A contaminant being found in jet fuel has forced one airport to shut down temporarily and may damage aircraft engines, some experts fear.

7.   According to some reports, at least one engine was damaged in the collision.

8.   He had refused to accept responsibility for damaging an engine.

9.   Initial reports indicated that the pilot aborted takeoff after the plane collided with two geese, damaging an engine.

10.   Some engines can be damaged by tipping.