VolvoEngine Parts

3847482 — Idler Pulley 3847482 For Volvo Penta Marine Engine D4 D6

This is an idler pulley, a non-driven pulley that maintains tension on a belt within the engine's accessory drive system. Manufactured to meet stringent OEM quality standards, it ensures proper belt tension and smooth operation, unlike a worn pulley with a damaged bearing or worn groove. Operators may experience increased belt noise, premature belt wear, or a loss of accessory function if this idler pulley fails.

Idler Pulley 3847482 For Volvo Penta Marine Engine D4 D6 – Part No 3847482 – Volvo Spare Part
Part Specifications
BrandVolvo
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 TypeIdler Pulley
MaterialSteel, Rubber
ApplicationEngine accessory drive system
Service LifeReplace as needed based on inspection
Compatibility3847482
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing idler pulley is often a persistent squealing or grinding noise from the engine bay. If left unaddressed, the pulley bearing can seize, causing the belt to slip or break, leading to a loss of function for driven accessories. This can result in overheating, loss of battery charging, or power steering failure.

Installation Tip

Ensure the mounting bolt and bracket are clean and free of corrosion before installing the new pulley. Do not overtighten the mounting bolt, as this can damage the pulley bearing or bracket.

Service Note

When replacing an idler pulley, always inspect the condition of the drive belt and other pulleys in the accessory system.