CATEngine Parts

294-1747 Connecting Rod — Cat 311D 312D

This connecting rod is a critical engine component that transmits the force from the piston to the crankshaft, converting linear motion into rotational motion. Manufactured to precise OEM specifications, it ensures proper engine timing and power transfer, unlike a worn rod which can lead to excessive play and noise. Symptoms of a failing connecting rod include a distinct knocking sound from the engine, loss of oil pressure, and potential engine seizure.

Connecting Rod – Part No 294-1747 – 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 TypeConnecting Rod
MaterialForged steel
ApplicationEngine crankshaft and piston assembly
Service LifeReplace as part of engine overhaul or if damaged
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A worn connecting rod often begins with an audible knocking or rattling sound from the engine, particularly under load. If left unaddressed, this noise will intensify, and the rod may develop excessive play, leading to oil pressure loss and potential damage to the crankshaft and cylinder walls. Continued operation risks severe internal engine damage and potential seizure.

Installation Tip

Ensure connecting rod bolts and nuts are torqued to the manufacturer's specifications using a calibrated torque wrench. Always use new rod bolts and nuts as they are often single-use items.

Service Note

Inspect crankshaft journals for scoring or out-of-roundness, and replace main and rod bearings as a set.