801331637 Mercruiser BUSHING

TIGHTENING PROCEDURE FOR MAIN BEARINGS(1) Thickness of spacer plate ... 8.59 0.03 mm (.338 .001 in.) Thickness of gasket that is placed between spacer plate and cylinder block ... 0.20 0.03 mm (.008 .001 in.)Height of liner over spacer plate, under installation pressure ... 0.03 to 0.15 mm (.001 to .006 in.)(2) Height of four dowels above top surface of cylinder block: End dowels (Put 7M7456 Bearing Mount Compound on two end dowels at installation) ... 18.5 0.5 mm (.73 .02 in.)Middle dowels ... 16.0 0.5 mm (.63 .02 in.)(3) Dimension (new) from centerline of crankshaft bearing bore to top of block (top deck) ... 425.45 0.15 mm (16.750 .006 in.) Minimum dimension from centerline of crankshaft bearing bore to top of block (top deck) ... 425.02 mm (16.733 in.) The flatness across the whole contact surface of the block must be within 0.10 mm (.004 in.) and within 0.05 mm (.002 in.) for any 177 mm (7.0 in.) section of the surface. The surface finish specification is 3.2 micrometers (125 micro-inches) maximum.(4) Bore in block for camshaft bearings ... 76.835 0.018 mm (3.0250 .0007 in.) Install bearings with the oil holes in the bearings on the horizontal centerline. Make sure the bearing joint position is above the oil holes.(5) Bore in the block for the main bearings: Standard, original size (new) ... 129.891 0.013 mm (5.1138 .0005 in.)0.64 mm (.025 in.) larger than original size ... 130.526 0.013 mm (5.1388 .0005 in.)(6) Distance from front of rear face of cylinder block to end of dowels ... 19.1 .05 mm (.75 .02 in.)(7) Width of main bearing cap ... 215.900 0.013 mm (8.5000 .0005 in.) Width of block for main bearing cap ... 215.900 0.013 mm (8.5000 .0005 in.)Clearance between main bearing cap and cylinder block ... 0.03 mm (.001 in.) tight to ... 0.03 mm (.001 in.) loose(8) Torque for the bolts that hold the caps for the main bearings: Install the main bearing caps with the marks (arrow) toward the front of the engine. Install each cap in the correct position by putting the number stamped on the bottom of the cap toward the corresponding number cast on left side of the cylinder block at the pan rail.a. Put 2P2506 Thread Lubricant on the threads of the bolts.b. Tighten the bolts first on the bearing tab side of the cap to ... 260 14 N m (190 10 lb.ft.)c. Tighten the bolts on the opposite side to ... 260 14 N m (190 10 lb.ft.)d. Put a mark on each bolt and cap.e. Tighten the bolts on the opposite side, from the mark ... 120 5°f. Tighten the bolts on the bearing tab side of the cap, from the mark ... 120 5°(9) Dimension (new) from centerline of crankshaft bearing bore to bottom of block (pan rails) ... 165.10 0.10 mm (6.500 .004 in.)
VIEW FROM RIGHT SIDE OF CYLINDER BLOCK(10) Put 5P3413 Pipe Sealant on threads of plugs before installation in the cylinder block.(11) Torque for bolts holding oil jet cooling tubes ... 24 7 N m (18 5 lb.ft.) Minimum permissible clearance between piston and oil jet cooling tube ... 0.64 mm (.025 in.)