Mercury E9TZ-6108-DB Piston

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Clean piston/rod assemblies, replace piston rings. Use ring installation tool to extract rings without damaging pistons. Remove carbon deposits from piston tops with wire brush or emery cloth. Clean ring grooves with groove cleaning tool. Inspect pistons for cracks, scoring, scuffing, overheating, or abnormal combustion. Check for piston corrosion indicating coolant leakage. Measure ring side clearance and piston-to-bore clearance. Resize pistons if needed. Inspect connecting rods for cracks or damage, replace if necessary.

Clean piston/rod assemblies, replace piston rings. Use ring installation tool to extract rings without damaging pistons. Remove carbon deposits from piston tops with wire brush or emery cloth. Clean ring grooves with groove cleaning tool. Inspect pistons for cracks, scoring, scuffing, overheating, or abnormal combustion. Check for piston corrosion indicating coolant leakage. Measure ring side clearance and piston-to-bore clearance. Resize pistons if needed. Inspect connecting rods for cracks or damage, replace if necessary.

Before installing piston/connecting rod assemblies, ensure clean cylinder walls, chamfered top edge of each cylinder, and crankshaft in place. Remove cap from end of number one connecting rod, wipe original bearing inserts' surfaces. Place upper and lower bearing inserts in connecting rod and cap, align tabs. Position piston ring gaps, lubricate piston and rings with oil. Use ring compressor to insert assembly into number one cylinder bore, tap piston into place, guide connecting rod onto crankshaft journal. Check connecting rod bearing oil clearance with Plastigage before bolting rod cap. Tighten nuts to specified torque, check Plastigage for oil clearance, scrape off traces if correct. Apply moly-base grease or assembly lube to bearing faces, slide connecting rod back into place. Repeat procedure for remaining pistons/connecting rods. Rotate crankshaft to check for binding, verify connecting rod endplay, resize rods if necessary at machine shop.

The tool should not cut into the ring travel area more than 1/32-inch.

You should push the connecting rod/piston assembly out through the top of the engine using a wooden or plastic hammer handle.

Scrape off any traces of Plastigage if the oil clearance is correct - Apply a layer of clean moly-base grease or engine assembly lube to the bearing faces - Slide the connecting rod back into place on the journal.

Rotate the crankshaft to check for binding - Compare the measurement of the connecting rod endplay to specifications - If necessary, resize the rods at an automotive machine shop.

The tool should not cut into the ring travel area more than 1/32-inch.

Check for piston corrosion indicating coolant leakage and correct the causes.