Before removing the connecting rods, look for scoring on the rod bearings and check for regular signs of wear and replace any bearing with unusual wear on it. Look for scoring, nicks and burrs on the connecting rod journals, because misaligned or bent connecting rods can result in abnormal damage to pistons, piston rings, cylinder walls, connecting rod bearings and crankshaft connecting rod journals. If wear or damages are caused by a misaligned connecting rod, check its alignment and replace any rods that are out of place, bent or twisted. Wipe the oil from the connecting rod journal, add a little lubricant to bearing insert (2) and center it in the connecting rod (1). Take the measurement at A and at B, so that the gap is no wider than 0.50mm (0.0196 inch). Use the piston ring compressor and Guide Pins Special Tool 8507 to fit the rod and piston assemblies so that the oil slinger in the rods points forward and the "F"'s in the pistons are also forward. In the bearing cap, install the lower bearing insert, make sure it is centralized and dry off the insert. Lay a Plastigage (1) band across the entire length of the lower insert at the middle of the bearing cap, making sure it's not crumbly; if it is, get a new piece. Put the bearing cap and connecting rod in place on the journal and tighten the connecting rod bolts to 27 Nm (20 ft. lbs.), plus 90 degrees twist, as spinning the crank later may cause the Plastigage to smear and give a wrong reading. After removing the bearing cap, measure the squeezed Plastigage (2) to discover the clearance between the bearing and the journal, always checking the Engine Specifications. The width of Plastigage along the insert should be the same everywhere; variations point to either a tapered journal or bent connecting rod or that foreign material is trapped between the insert and the cap or rod. If the clearance is correct, bore removal is not required; remove the Plastigage from the crankshaft journal and bearing insert and move on with installation. Should the bearing-to-journal clearance be greater than it should, choose the recommended bearing set, making sure to never reuse the connecting rod bolts (because they are Torque to Yield Bolts) so that they are always replaced whenever removed. Test the Plastigage measurement again just before you assemble your gears to confirm the correct choice of bearings. When the correct insert is picked, put everything in place and tighten the bolts connecting the connecting rod to 27 Nm (20 ft. lbs.) plus 90 degrees. Insert a gauge between the connecting rod and crankshaft journal flange, check the Engine Specifications for correct clearance and use a new connecting rod if the gap is not right.