Hummer 89017850 Piston Asm,(W/ Pinion & Retainer) (0.5Mm Outside)

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When removing piston/connecting rod assemblies, start by checking for ridges at the upper limit of ring travel in each cylinder and remove them if present to avoid piston breakage. For verifying connecting rod endplay with feeler gauges, make sure that it does not exceed the service limit. The connecting rods and caps must be carefully labeled for proper reassembly. After removing the bearing insert, remove connecting rod cap fasteners and push the connecting rod/piston assembly out of the engine. To protect them, place the removed heads on blocks of wood. While installing piston rings, check and adjust ring end gaps so they are within specified limits and install rings correctly on each piston. Lubricate pistons, rings and cylinders with engine oil during installation and use a piston ring compressor. Make sure cylinder walls are clean when installing piston/connecting rod assemblies; apply engine oil to them; then guide each assembly into a cylinder being careful about its orientation. Verify connecting rod bearing oil clearance using Plastigage to ensure it meets specifications Apply grease or assembly lube to bearing faces before final installation of rod caps and bolts Repeat these steps for all piston/connecting rod assemblies; then rotate the crankshaft by hand checking for binding Finally, check correct connecting rod endplay, take rods for resizing if new components were installed.

Before removing piston/connecting rod assemblies, you should check for ridges at the upper limit of ring travel in each cylinder and remove them if present to avoid piston breakage. You should also verify connecting rod endplay with feeler gauges and address any deviations to ensure it falls within the service limit.

When installing piston/connecting rod assemblies, you should ensure that the cylinder walls are clean and apply engine oil. Carefully guide each assembly into the cylinder while paying attention to proper orientation. It is also important to verify the connecting rod bearing oil clearance using Plastigage and ensure it falls within specifications. Before the final installation of rod caps and bolts, grease or assembly lube should be applied to the bearing faces.

When installing piston/connecting rod assemblies, you should ensure that the cylinder walls are clean and apply engine oil. Carefully guide each assembly into the cylinder while paying attention to proper orientation. It is also important to verify the connecting rod bearing oil clearance using Plastigage and ensure it falls within specifications. Before the final installation of rod caps and bolts, grease or assembly lube should be applied to the bearing faces.

When installing piston/connecting rod assemblies, you should ensure that the cylinder walls are clean and apply engine oil. Carefully guide each assembly into the cylinder while paying attention to proper orientation. It is also important to verify the connecting rod bearing oil clearance using Plastigage and ensure it falls within specifications. Before the final installation of rod caps and bolts, grease or assembly lube should be applied to the bearing faces.

During piston ring installation, you should check and adjust the ring end gaps to ensure they are within specified limits. The rings should be installed correctly on each piston. It is important to lubricate the pistons, rings, and cylinders with engine oil during installation. Additionally, a piston ring compressor should be used.