CATEngine Parts

4w-0452 Crankshaft Oil Seal — Cat 3306

This crankshaft oil seal is essential for preventing oil from leaking out of the engine at the crankshaft's rear main bearing. Manufactured to meet strict OEM sealing standards, it provides a durable barrier against oil loss, unlike a brittle or worn seal. Operators may notice oil drips or puddles under the rear of the engine, or a persistent burning oil smell if this seal fails.

Crankshaft Oil Seal – Part No 4w-0452 – CAT Spare Part
Part Specifications
BrandCAT
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeCrankshaft Rear Main Oil Seal
MaterialNBR Rubber, Steel Reinforcement
ApplicationEngine Crankshaft Rear Main Bearing
Service LifeReplace as needed during engine overhaul
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first indication of a failing crankshaft oil seal is typically visible oil leakage from the rear of the engine. If left unaddressed, the oil loss can become significant, leading to low oil levels and potential lubrication starvation. This poses a risk of severe internal engine damage due to insufficient oil.

Installation Tip

Carefully inspect the crankshaft surface where the seal rides for any nicks or scoring that could cause immediate leakage. Use a proper seal driver to install the seal evenly and avoid damaging the lip.

Service Note

Inspect the crankshaft for any damage or wear on the sealing surface, and check the condition of the rear main bearing.