Toyota 13101-75041 Piston Sub-Assy, W/Pin

You can Select Your Vehicle to check if 13101-75041 fits your vehicle.

Prior to removing the piston and connecting rod assemblies, the cylinder head(s), oil pan, and oil pump pick-up at the upper limit of ring travel (approximately 1/4-inch down from the top of each cylinder) must be removed. If carbon deposits or cylinder wear have created ridges, these must be completely eliminated using a special tool, specifically a ridge reamer, before the pistons are removed to avoid piston damage. After the ridges are removed, turn the engine upside-down with the crankshaft facing up. Before disconnecting the connecting rods, check the endplay with feeler gauges by sliding them between the first connecting rod and the crankshaft throw until the play is eliminated; the endplay corresponds to the thickness of the feeler gauge(s). If the endplay exceeds the specified service limit, new connecting rods will be necessary. If new rods or a new crankshaft are installed, the endplay may fall below the service limit, requiring machining of the rods to restore it. Check the connecting rods and caps for identification marks; if they are not clearly marked, use a small center punch to create indentations on each rod and cap to indicate their associated cylinder. Loosen each connecting rod cap nut by 1/2-turn until they can be removed by hand, then take off the number one connecting rod cap and bearing insert without dropping the bearing insert. To protect the crankshaft journal and cylinder wall during piston removal, slip a short length of plastic or rubber hose over each connecting rod cap bolt. Remove the bearing insert and push the connecting rod/piston assembly out through the top of the engine using a wooden hammer handle on the upper bearing surface in the connecting rod; if resistance is encountered, ensure all ridge material has been removed from the cylinder. Repeat this process for the remaining cylinders, turning the crankshaft as needed to align the rod with the cylinder bore. After removal, reassemble the connecting rod caps and bearing inserts in their respective rods and install the cap nuts finger tight to prevent accidental damage to the bearing surfaces. Avoid separating the pistons from the connecting rods.

Tap the top edge of the ring compressor to ensure it contacts the block around its entire circumference.

Piston-to-bore clearance is checked by measuring the bore and the piston diameter. The piston should be measured across the skirt at a 90-degree angle to the piston pin. The clearance is obtained by subtracting the piston diameter from the bore diameter. If the clearance is greater than specified, the block will need to be rebored, and new pistons and rings installed.

If new rods or a new crankshaft are installed, the endplay may fall under the service limit. If this occurs, the rods will have to be machined to restore it. Consult an automotive machine shop for advice if necessary. Repeat the procedure for the remaining connecting rods.

If the pistons and cylinder walls are not damaged or excessively worn, and if the engine block is not rebored, new pistons are not necessary. However, new piston rings should always be used when an engine is rebuilt.

The connecting rod endplay must be checked and compared to ensure it is correct. If new rods or a new crankshaft were installed, the endplay may need adjustment.

All traces of carbon should be scraped from the top of the piston. A hand-held wire brush or fine emery cloth can be used after the majority of the deposits have been scraped away. It is crucial not to use a wire brush mounted in a drill motor, as the piston material is soft and may be eroded.

Before removing the connecting rods, check the endplay with feeler gauges. Slide them between the first connecting rod and the crankshaft throw until the play is removed. The endplay is equal to the thickness of the feeler gauge(s). If the endplay exceeds the specified service limit, new connecting rods will be required.

Gently tap on the top of the piston with the end of a wooden hammer handle while guiding the connecting rod into place on the crankshaft journal. Maintain downward pressure on the ring compressor to prevent the rings from popping out.