Lincoln 3R2Z-6108-A Piston And Pin Assembly

You can Select Your Vehicle to check if 3R2Z-6108-A fits your vehicle.

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, and in line with the piston pin. The clearance is obtained by subtracting the piston diameter from the bore diameter.

Compare the width of the crushed Plastigage to the scale printed on the Plastigage envelope to obtain the oil clearance and compare it to the specifications.

After removing the bearing insert, push the connecting rod/piston assembly out through the top of the engine using a wooden or plastic hammer handle. If resistance is felt, double-check to ensure that all of the ridge was removed from the cylinder.

Before removing the connecting rods, check the endplay with a dial indicator or feeler gauges. Slide the gauge 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 service limit, new connecting rods will be required. If new rods or a new crankshaft are installed, the endplay may fall under the specified minimum, and the rods will need to be machined to restore it.

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, and in line with the piston pin. The clearance is obtained by subtracting the piston diameter from the bore diameter.

Ensure no dirt or oil was between the bearing inserts and the connecting rod or cap when the clearance was measured, and recheck the journal diameter.

The pistons and connecting rods are now ready for inspection and overhaul at an automotive machine shop.