I need some help diagnosis the knocking sound from my engine.
It is 1.4 tdi, BMS, 59 kW. 14 months ago faulty injector caused piston to brake in half, damagind cylinder wall. Engine was rebulit, new piston, new rings,crankshaft was overhauled, neg big end bearing, new ca,shaft bearing and new crank bearings. One month after the overhaul, I started to notice knockig sound, fade at first only after changing gears when revs were droping and clutch was engaged. It lasted until last month, same sound, 4 mechanichs said it is normal, but the sound was not there before the injector catastrophy.
Since that, turbo was changed, and clutch last month. Since last week, noise got worse, now have metal knockin, deep, like subtle explosions around 2000 rpm whed accelerating. When clutch is engaged it is louder. Vibrations can be felt on the pedal (clutch), and are corespodenting with the sound. If airfilter removed it sound like backfire (like worn camshaft). But, mpg is great, no loss of power, nothing!
Yesterday, 120 km/h, motorway, 4,4 l / 100 km.
I am puzzled.
What are my options? Camshaft and lifters? Oil pumo (chain)? Rod knock?
It is 1.4 tdi, BMS, 59 kW. 14 months ago faulty injector caused piston to brake in half, damagind cylinder wall. Engine was rebulit, new piston, new rings,crankshaft was overhauled, neg big end bearing, new ca,shaft bearing and new crank bearings. One month after the overhaul, I started to notice knockig sound, fade at first only after changing gears when revs were droping and clutch was engaged. It lasted until last month, same sound, 4 mechanichs said it is normal, but the sound was not there before the injector catastrophy.
Since that, turbo was changed, and clutch last month. Since last week, noise got worse, now have metal knockin, deep, like subtle explosions around 2000 rpm whed accelerating. When clutch is engaged it is louder. Vibrations can be felt on the pedal (clutch), and are corespodenting with the sound. If airfilter removed it sound like backfire (like worn camshaft). But, mpg is great, no loss of power, nothing!
Yesterday, 120 km/h, motorway, 4,4 l / 100 km.
I am puzzled.
What are my options? Camshaft and lifters? Oil pumo (chain)? Rod knock?
