Reassembly Position of Critical Parts: Care should be taken to note the position of the unidirectional parts while dismantling the engine. This will ensure dimensions (depth, distance or position) to be correctly fitted while reassembling.
Non-reusable Parts: Always replace gaskets, O-rings, oil seals, metal sealing washers, cir-clip and cotter pins while reassembling the engine.
Greasing or Oiling of Parts before Assembly: It is important to apply recommended lubricant while assembling the engine parts to ensure better bedding in and preventing rapid wear out.