Man Tgx euro 4 - Blowing engine problem

mutevesa 63 0
  • #1
    Level 1  
    The truck blow off the oil trough the turbo compressor and there were a high pressure trough the oil cap ,after we open the engine , we found a broken segment , the piston looked normal so we change all the segments , piston liner and the biel bearings, we tested the head but the hidro test was good , so we change only the valves . After we finish the engine repair the truck starts good but in few minutes working it started to blow oil again trough the turbocompressor and making pressure in the oil cap. Any idea what could be the problem ? We think to open the air compressor now and look for damages inside. The head is good , the segments are alright , is it possible a hidden small hole in some piston to make so big pressure ? Any ideas ? Thanks