Valve mechanism Volvo B20A/B/D

The group includes camshaft kits, inlet valves and exhaust valves, valve guides, washers, push rods, camshaft gear sets and thrust flanges. During a top overhaul it is typical to measure valve clearance against the guide, check seat surfaces and replace push rods that have become bent. A worn camshaft and a tired timing gear give an uneven idle and weak pulling power, so they are often checked at the same time. Note that the B20B is the sharper variant with higher output – check the version against your engine before ordering parts.