CATEngine Parts

329-8797-3298797 Belt Tensioner 329 8797 — Cat C18

This belt tensioner is a vital engine component that automatically maintains the correct tension on the serpentine or V-belt, ensuring optimal power transfer to accessories like the alternator and water pump. Manufactured to meet OEM quality standards, it provides consistent belt tension, unlike a worn tensioner that may allow the belt to slip or break. Operators may notice a squealing noise from the belt area, premature belt wear, or a loss of accessory function if this tensioner fails.

Belt Tensioner 329 8797 – Part No 329-8797-3298797 – 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 durable polymer
ApplicationEngine accessory drive belt system
Service LifeReplace as needed based on diagnostic testing or audible symptoms
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A failing belt tensioner often begins with an audible squealing or chirping noise from the engine's front end, especially on startup or under load. If left unaddressed, the tensioner can seize or lose its ability to maintain tension, leading to rapid belt wear, slippage, or the belt coming off entirely, disabling critical engine accessories.

Installation Tip

Before installing, ensure the mounting surface on the engine block is clean and free of corrosion to guarantee a proper seal. Do not use the new tensioner to pry or align other components during installation.

Service Note

Always inspect the condition of the accessory drive belt and replace it if it shows signs of cracking, fraying, or excessive wear when installing a new belt tensioner.