Genuine Volvo V70 Rod Bearing

Volvo V70 Rod Bearing Parts and Q&A

• Bearing Set
  30731538
  Q: What should you know about Rod Bearing renewal and inspection during engine overhaul on Volvo V70?

  A:

  During engine overhaul, it is necessary to renew the main and big-end bearing shells while keeping the old ones to close examination, as they can tell much of the condition of the engine. Bearing failures can occur for a number of reasons, such as the lack of lubrication, dirt or foreign particles, engine overloading and corrosion, so these problems must be rectified before reassembling the bearing to avoid a repeat occurrence. When inspecting the bearing shells, they should be removed from their respective locations and lay them out on a clean surface in order to match any problems with respective crankshaft journals, making sure to not scratch their bearing surfaces. Foreign matter can enter the engine either during the assembly of the engine, passing through filters or from machining operations and can become imbedded in the soft bearing material, and larger particles may score or gouge the shell and journal. To avoid these failures, all parts must be thoroughly cleaned and kept clean during assembly, as well as changing the oil and filters on a regular basis. Lack of lubrication can be caused by excessive heat, overloading, oil leakage, blocked oil passages, etc., causing severe damage, such as the wiping or extrusion of bearing material from the shell's backing position. Driving habits also affect the life of the bearing, full-throttle and low-speed full-power operation will cause the bearing to work under high load, which will cause fatigue failure of the bearing, and short-distance driving is conducive to corrosion caused by insufficient heat. Incorrect fitting of shells can cause oil starvation and shell failure due to trapped dirt or lack of clearance. Care should be taken in reassembly to avoid contact with the bearing surfaces as this causes scratches and contamination. For the correct bearing selection it is recommended that the crankshaft be measured and read by a specialist who can give appropriate bearing shells.