5.1.13. Knock in the engine
The knock in the heated-up engine almost always indicates damage of bearings. Most often there are damages on conrod bearings, is more rare — on basic bearings of a bent shaft. Replacement of the damaged bearing demands the large volume of repair work.
Diagnostics of bearings
Add turns and then dump gas. If there is a knock which does not stop with reduction of speed, stop the movement and park the car.
The strong knock at big turns of the engine decreasing or vanishing when dumping gas indicates capital breakage of the bearing.