Ford 2U3Z-6108-AA Piston And Pin Assembly

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If carbon deposits or cylinder wear have produced ridges, they must be completely removed with a special tool called a ridge reamer. Follow the manufacturer's instructions provided with the tool. Failure to remove the ridges before attempting to remove the piston/connecting rod assemblies may result in piston breakage. Note: Do not let the tool cut into the ring travel area more than 1/32-inch.

If the engine is being rebuilt because of a connecting rod knock, new rods should be installed.

After removal, reassemble the connecting rod caps and bearing inserts in their respective connecting rods and install the cap nuts finger tight. Leaving the old bearing inserts in place until reassembly will help prevent the connecting rod bearing surfaces from being accidentally nicked or gouged.

Clean the connecting rod cap bearing face, remove the protective hoses from the connecting rod bolts, and install the rod cap. Make sure the mating mark on the cap is on the same side as the mark on the connecting rod. Install the nuts and tighten them to the torque, working up to it in three steps.

Use your fingernail to feel if a ridge has formed at the upper limit of ring travel (about 1/4-inch down from the top of each cylinder).

Tighten the nuts to the specified torque, working up to it in three steps, and repeat the entire procedure for the remaining pistons/connecting rods.

If the pistons and cylinder walls aren't damaged or worn excessively and if the engine block is not rebored, new pistons won't be necessary. Normal piston wear appears as even vertical wear on the piston thrust surfaces and slight looseness of the top ring in its groove. New piston rings, however, should always be used when an engine is rebuilt.

If the pistons and cylinder walls aren't damaged or worn excessively, and if the engine block is not rebored, new pistons won't be necessary. Normal piston wear appears as even vertical wear on the piston thrust surfaces and slight looseness of the top ring in its groove. New piston rings should always be used when an engine is rebuilt.

Check the connecting rod end-play and compare it to the specifications. If new rods or a new crankshaft were installed and the end play is inadequate, the rods will need to be resized at an automotive machine shop.

THIS IS ONLY A PISTON AND PIN