CATEngine Parts

1b-7709 Cylinder Head Bolt — Cat 3306 3406

This is a cylinder head bolt, a high-strength fastener critical for securing the cylinder head to the engine block. It provides the necessary clamping force to maintain a seal between these two major engine components, preventing combustion gases and coolant from escaping. Operators might observe coolant leaks, white smoke from the exhaust, or a loss of engine power if these bolts fail or loosen.

Cylinder Head Bolt – Part No 1b-7709 – 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 Bolt
MaterialHigh-tensile forged steel
ApplicationEngine cylinder head to block seal
Service LifeReplace during cylinder head service
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A failing cylinder head bolt may initially present as minor coolant loss or slight exhaust discoloration. If the issue progresses, it can lead to noticeable coolant leaks onto the engine block or exhaust manifold, accompanied by white smoke from the exhaust. The worst consequence is a compromised head gasket seal, leading to severe internal engine damage and potential loss of compression.

Installation Tip

Always clean the bolt holes in the engine block thoroughly to remove any debris or old thread sealant before installing new bolts. Never reuse old cylinder head bolts, as they are designed for single use and can fail if stretched beyond their yield point.

Service Note

When replacing cylinder head bolts, it is essential to inspect the cylinder head and engine block mating surfaces for flatness and damage, and to replace the head gasket.