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Crankshaft Volvo B4B

Low oil pressure, knocking main bearings or bluish-red exhaust smoke under acceleration are classic signs of a worn crank assembly in the small 1414 cc engine. When a B4B from the 444 years is being rebuilt, it is the rotating assembly itself – crankshaft, bearings, pistons and cam drive – that determines how long the motor lasts after reassembly.

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This category gathers the parts around the work of the crankshaft and pistons. The group includes rod bearings and main bearing sets in several undersizes for a ground shaft, piston sets and piston kits with matching piston ring sets, a cam gear set for the valve train, plus spring washers and a flywheel bearing.

A common checkpoint during a rebuild is bearing clearance: the crankshaft's bearings can differ between model years and versions, so main and rod bearings should be measured and matched to the shaft's undersize before new sets are fitted – check which version your car has. The piston ring end gaps and the flywheel bearing play are likewise worth checking while the motor is apart.

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