CATEngine Parts

324-3218 Belt Tensioner — Cat

This belt tensioner is a critical component of the engine's accessory drive system, maintaining optimal tension on the serpentine belt. It ensures proper operation of components like the alternator, water pump, and air conditioning compressor by preventing belt slippage and wear. A failing tensioner may cause a noticeable squealing noise from the belt, reduced performance of accessories, and eventually belt breakage.

Belt Tensioner – Part No 324-3218 – 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 TypeBelt Tensioner Assembly
MaterialSteel and rubber composite
ApplicationEngine accessory drive system
Service LifeReplace every 4,000 hrs or as needed
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A worn belt tensioner often begins with a high-pitched squealing noise from the engine compartment, particularly noticeable during cold starts or when accessories are engaged. If left unaddressed, the tensioner can fail completely, leading to the serpentine belt becoming loose, slipping, or detaching, which will cause critical engine accessories to cease functioning.

Installation Tip

Before installing the new tensioner, ensure the mounting surfaces on the engine block are clean and free of debris. Avoid over-tightening the mounting bolts, as this can strip the threads or damage the tensioner housing.

Service Note

Always inspect the serpentine belt for wear and the condition of all accessory pulleys when replacing the belt tensioner.