Chevrolet 89060486 Piston Asm,(W/ Pinion)

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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 the decomposition of the piston and connecting rod assemblies, the cylinder head and oil pan must be and removed. As for any ridges at the upper limit of ring travel they shall be removed with a ridge reamer presuming that failure to do so may lead to piston breakage, and you should attempt this with the flat part of your fingernail. Bolted some flanges Back, flipped the engine so that the crankshaft is upright again and then drilled off the remaining ridges. Measure the connecting rod endplay with feeler gauges before proceeding to remove the main bearing cap assembly and connecting rods and the same must meet factory standard endplay plus or minus a tolerable amount. Identify the connecting rods and their respective caps, then remove the connecting rod cap bolts and the first connecting rod cap together with the bearing insert - be careful not to let the bearing insert fall. Remove the connecting rod/piston assembly through the top of the engine, employing a wooden or plastic hammer handle, if you can. Do this for the rest of the cylinders, and put back the connecting rod caps and the bearing inserts in their prospective rods with the old inserts being left in place so as not to be damaged. The pistons and the connecting rods are now available for detailed assessment and for being serviced. Before fitting new piston rings also measure the ring end gaps and which piston rings should be fitted should be of the same brand as that of pistons. Piston /connecting rod assemblies and new ring sets need to be laid out in sets for easy installation. Place the top ring into the first cylinder and check its end gap using the feeler gauges because it should be as per prescribed standard. If the gap is too small, one should be very keen to start filing the ring ends to increase the size of the gap. Repeat the same to each ring and it is important that the rings, piston, and cylinders should be in set. Once the end gaps are right, then place the rings on the pistons starting with the oil control ring then the middle, and top rings in the right orientation. Don't install until the cylinder walls are clean, the edge has been chamfered and the crankshaft has been fitted. Remove old bearing inserts and thoroughly wash the connecting rod bearing cap surfaces and bearing bush surfaces and fit in the new bearings without applying any lubricant. Install the piston ring gaps facing in the appropriate directions, apply a suitable amount of piston/ring lubricant and make use of the piston ring compressor to safely place the piston into the cylinder. Verify the connecting rod bearing oil clearance with Plastigage, after the cleaning of the surfaces from the oil. In the case where the clearance is not as required, check on the bearing sizes and journal diameter. As in the previous step, it is checked, a layer of grease should be uniformly distributed on the bearing faces, the connecting rod and cap should be reinstalled with bolts tightened to the specified torque. Follow the same process to the other assemblies while maintaining high levels of cleanliness and proper orientation. Last, turn with the crankshaft to examine if there is binding, and see the bearing clearances of the con rod end, and adjust if the new components were fitted.

Before being able to take out the piston and connecting rod assemblies they need to be disassembled by having to take off the cylinder head and the oil pan. Place a fingernail, index finger, to look for any ridges at the maximum of the ring travel, which are stripped off with a proper tool so as not to cause the piston to break. Once again flipping the engine over turn it so the crankshaft is oriented up after the method of removing the ridges mentioned above. Inspection of the connecting rod end play with a feeler gauge, should be done to see if it is within the service limit, if it is beyond this limit, then it may be necessary to replace the connecting rods. Label each of the connecting rods and their respective caps to tell apart them while loosening the cap bolts to the required torque level at which the bolts can be removed easily. Twist off the first connecting rod cap and the bearing insert should stay in place without falling out, push out the connecting rod / piston combination through the top of the engine. Do the same for the rest of the cylinders and tighten the caps and inserts as not to cause any misalignments. The pistons and connecting rods of the engines are now prepared for checks and refurbishment if necessary. When replacing the piston rings make sure that the ring end gaps are correct, as well as the piston ring side clearance. Arrange the cylinder/piston and connecting rods along with new rings in a manner according to matching of the piston/connecting rod assemblies. Put the top ring into the first cylinder with the end of the ring flush with the cylinder walls and then feel for the end gap with feeler gauges. If the gap is not right, then, erase it gradually by grinding the ring ends. Do this for each ring, to make sure that each one is matched up correctly with the pistons and cylinders. After adjustments of the above gaps, the rings must be fitted on the pistons, in the sequence of the oil control ring, followed by the middle and the upper ring, with the Vs facing upwards. It is also important to note that prior to installation cylinder walls should be clean, edges of the cylinder should be chamfered and the crankshaft fitted. Remove and discard the old bearing inserts with a clean anc clean tool and a small tap install the new bearing inserts into the connecting rod and cap without using any lubrication to ensure that the inserts are fitted properly. Align the piston ring gaps at 90 degrees interval and apply oil to the piston as well as all piston rings, for putting of this ring, a piston ring compressor is most appropriate. Place the piston/connecting rod assembly direct into the cylinder bore in the right formation with out any forceful means. Following the installation, it is required to measure the oil clearance of the connecting rod bearing by using Plastigage and ascertain the size and the condition of the bearing inserts. If the clearance is other than as specified, cleanliness and journal diameter should be checked before contemplating a rebore. Clean off the Plastigage and coat the bearing surfaces with fresh grease and place the rod cap complete with new bolts and tighten to manufacturers recommendation. This is done for the remaining assemblies, making sure that each of them does not have dirt, and is well oriented. Last, turn the crankshaft to see if there is any bind, or interference, and to check the connecting rod end play once more, in relation to the standard an.keras of tolerance.

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.

The cylinder head and oil pan must be taken off.

Clean the bearing surfaces and then install the new upper bearing insert, ensuring proper fit without lubrication.

Use Plastigage to check the connecting rod bearing oil clearance, ensuring the surfaces are clean and free of oil.

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.

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.

Verify the bearing sizes and journal diameter.

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.