8N3182 Piston with Pin for Caterpillar 3304 3306 Engine

8N3182 Piston with Pin for Caterpillar 3304 3306 Engine

The 8N3182 / 8N-3182 piston is used for Caterpillar 3304 and 3306 engine repair applications. Cat official parts information identifies 8N-3182 as an engine piston body, while public supplier references commonly list 8N3182 as a piston with pin and clips for Caterpillar 3304 / 3306 engines.

This piston should be selected by the original part number, engine model, piston size and physical configuration, not by engine model alone. Caterpillar 3304 and 3306 engines may vary by arrangement number, piston type, ring groove, combustion system and previous overhaul history. Final fitment should be verified before ordering.

Cross Reference Numbers

Common reference numbers may include 8N3182, 8N-3182 and 9S8913. Some public aftermarket references may also mention related piston family numbers such as 7N9183, 8N3181, 8N3183 or 9S4091, but these should be checked carefully against the original piston and engine arrangement before purchase.

These numbers should be treated as reference information only. Pistons with similar Caterpillar 3304 / 3306 references may still differ in piston crown, skirt profile, alfin insert, compression height, ring groove and pin size.

Application and Fitment Reference

This 8N3182 Caterpillar piston is commonly referenced for Caterpillar 3304 and Caterpillar 3306 engine applications. Public supplier references describe it as a piston with pin and clips for 3304 / 3306 pre-combustion chamber engine references.

Before purchase, compare the old piston number, bore diameter, piston crown shape, ring groove, compression height, pin diameter, pin length and engine arrangement number. If the engine has been rebuilt before, the existing piston and liner size should be checked before ordering standard size parts.

Technical Reference

Public product references commonly list this piston with a 120.65 mm / 4.750 in bore and a 38.13 mm / 1.500 in pin diameter. Some references also mention a late skirt profile, dual insert design and a separate ring set requirement. These values should be verified against the old piston and engine service requirements before purchase.

Common Failure Symptoms

• Low compression: worn piston, rings or cylinder liner may reduce compression and starting performance.

• Excessive blow-by: combustion gas leakage may indicate piston ring wear, liner wear or piston damage.

• High oil consumption: worn ring grooves, damaged rings or cylinder wear may allow oil to enter the combustion chamber.

• Knocking or abnormal engine noise: worn piston pin, pin bore, liner or connecting rod bushing should be checked.

• Scored piston skirt: overheating, poor lubrication, contamination or incorrect clearance may cause piston scuffing.

• Broken ring land: incorrect ring installation, detonation, overheating or excessive wear may damage the piston crown or ring groove.

Troubleshooting Before Replacement

• Check compression, blow-by and oil consumption before engine teardown.

• Inspect cylinder liner wear, liner protrusion and surface condition.

• Check piston crown, ring grooves, skirt condition and pin bore wear.

• Confirm whether the engine uses standard size or oversize repair components.

• Inspect connecting rod bushing, piston pin, rings and liner as a complete repair group.

• Verify the old piston part number and engine arrangement number before ordering replacement parts.

Installation and Maintenance Notes

• Clean the cylinder block, liner bore and piston parts before assembly.

• Check piston-to-liner clearance according to the engine service procedure.

• Use the correct piston ring set and confirm ring groove compatibility before installation.

• Lubricate the piston pin, rings and liner during assembly.

• Install piston rings in the correct direction and stagger ring gaps according to the service procedure.

• Check connecting rod orientation and torque fasteners to the specified procedure.

• After overhaul, run the engine under proper break-in conditions and monitor oil pressure, coolant temperature, smoke and blow-by.

Fitment Check Before Ordering

To reduce wrong orders, please send the engine model, engine arrangement number, old piston part number, piston crown photo, skirt photo, ring groove photo, pin photo and liner size information before quotation.

FAQ

Is 8N3182 used for Caterpillar 3304 and 3306 engines?

Yes. Public supplier references commonly list 8N3182 for Caterpillar 3304 and 3306 engine applications. Final fitment should be verified by the old piston number, piston size and engine arrangement number.

Is 8N3182 a piston body or a piston with pin?

Cat official parts information identifies 8N-3182 as an engine piston body. Some suppliers sell 8N3182 as a piston with pin and clips. Please confirm the actual supply configuration before ordering.

What are the common reference numbers for 8N3182?

Common reference numbers may include 8N3182, 8N-3182 and 9S8913. Some aftermarket references may also mention related piston family numbers, but they should be checked carefully before use.

What should be checked before ordering this piston?

Please check the old piston number, bore diameter, piston crown shape, ring groove, pin diameter, pin length, liner size and engine arrangement number.

Are piston rings included?

Ring inclusion depends on the supply configuration. Some references mention that the ring set is sold separately, so the required ring set should be confirmed before ordering.