Crankshaft Main Bearing Set Fit 89-08 Mercury Cougar 3.8 4.2 OHV 12V Size:Undersize 1.00mm / 0.040in you need to purchase a

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Crankshaft Main Bearing Set Fit 89-08 Mercury Cougar 3.8 4.2 OHV 12V Size:Undersize 1.00mm / 0.040in you need to purchase aCrankshaft Main Bearing Set Fit 89 08 Mercury Cougar 3. 8 4. 2 OHV 12V. The crankshaft, connecting rods and bearings are extremely important in every engine build, because they convert the reciprocating motion of the pistons into rotational torque. The longer the stroke, the greater the leverage effect and the greater the torque output of the engine. Time will come that your engine bearings will wear out. Always remember, when your engine bearings