CATEngine Parts

335-6220 Cylinder Head Group — Cat 777 785

This cylinder head group is a critical component of the engine's combustion system, responsible for housing the valves and providing a seal for the combustion chamber. It is manufactured to meet stringent OEM quality standards, ensuring superior durability and performance compared to worn or damaged heads that may exhibit cracks or warping. Operators may notice a significant loss of power, rough idling, or visible exhaust smoke if the cylinder head is failing.

Cylinder Head Group – Part No 335-6220 – 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 TypeCylinder Head Group
MaterialCast iron
ApplicationEngine combustion system
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A failing cylinder head may first present as persistent engine misfires or a noticeable decrease in engine power. If left unaddressed, coolant may begin to leak into the combustion chamber or oil passages, leading to overheating and internal lubrication issues. Continued operation risks severe internal engine damage due to compromised sealing and lubrication.

Installation Tip

Ensure the engine block deck is perfectly clean and free of any debris or old gasket material before installing the new cylinder head. Avoid overtightening the head bolts in a random pattern, as this can lead to uneven clamping force and head distortion.

Service Note

Always inspect and replace the head gasket, and check the condition of the cylinder head bolts and engine block deck.