851083 Volvo.Penta Housing

1. Remove the carbon from the top inside surface of the cylinders with tool (A).2. Turn the crankshaft until two pistons are at bottom center. 3. Remove connecting rod caps (1) from the two connecting rods. Put pieces of rubber hose or tape on the threads of the connecting rod bolts as protection for the crankshaft.4. Push the pistons and connecting rods away from the crankshaft until the piston rings are above the cylinder block. 5. Remove the two pistons (2) and the connecting rods. Keep each connecting rod cap with its respective connecting rod and piston. Put identification on each connecting rod as to its location for use at installation.
Do not turn the crankshaft while any of the connecting rods are in the engine without the caps installed.
6. Do Steps 2 through 5 for the remainder of the pistons.Install Pistons
1. Put clean engine oil on the piston rings, connecting rod bearings, cylinder walls and crankshaft bearing journals.2. Turn the crankshaft until the bearing journal for the pistons to be installed is at bottom center.3. Make sure the piston ring gaps are at least 120° apart on the piston. 4. Use tool (A) and install the piston in position in the same cylinder bore from which it was removed. The hole (crater) in the top of the piston must be toward (nearest) the center of the engine. For more detail about the installation of connecting rod bearings see REMOVE AND INSTALL CONNECTING ROD BEARINGS.5. Check the bearing clearances with tool (B).6. Put clean engine oil on the threads of the bolts and contact surfaces of the nuts for the connecting rod caps.
When the connecting rod caps are installed, make sure that the number on the side of the cap is next to and respective with the number on the side of the connecting rod.
7. Put the cap (1) in position on the connecting rod and install the nuts. Tighten the nuts to a torque of 30 3 lb.ft. (40 4 N m). Put a mark on each nut and the end of each bolt. Tighten the nuts 60 5° more.8. Check the side clearance between two connecting rods on the same crankshaft journal. Clearance must be .003 to .033 in. (0.076 to 0.838 mm) for new rods.9. Do Steps 1 through 8 for the remainder of the pistons.end by:a) install cylinder headsb) install oil panDisassemble Pistons
start by:a) remove pistons 1. Remove the rings from the piston with tool (A). 2. Remove snap ring (2), pin (1) and connecting rod (3) from the piston.Assemble Pistons
1. Install connecting rod (1) in the piston with boss (2) on the same side as the hole (crater) in the top of the piston.2. Install piston pin (3) and snap ring (4). 3. When old pistons are to be used, clean the piston grooves with tool (A).4. Install the spring for the oil ring. Install the oil ring with tool (B). The gap in the ring must be approximately 180° from the oil ring spring connections.5. Install the compression ring with tool (B). The side of the ring that has the identification "TOP" must be toward the top of the piston. The gaps in the rings must be approximately 120° apart. Compression rings that do not have identification must be installed with the edge that has bevel toward the top of the piston.end by:a) install pistons