CATEngine Parts

124-1855 Cylinder Head Bolt — Cat 3408 3412

This is a high-strength steel bolt designed to secure the cylinder head to the engine block, ensuring a proper seal for combustion and coolant passages. It is manufactured to meet stringent Caterpillar specifications, offering superior tensile strength and fatigue resistance compared to worn or damaged fasteners. Failure can manifest as coolant leaks into the combustion chamber or oil passages, rough engine running, or a loss of compression.

Cylinder Head Bolt – Part No 124-1855 – 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-strength forged steel
ApplicationEngine cylinder head mounting
Service LifeReplace as needed during engine overhaul
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing cylinder head bolt might be subtle coolant loss or a slight rough idle. If ignored, the seal can degrade further, leading to more significant coolant leaks, oil contamination, or a noticeable loss of engine power. Continued operation risks internal engine damage from uncontrolled fluid mixing or combustion blow-by.

Installation Tip

Always clean the bolt threads and the threaded holes in the engine block thoroughly before installation to ensure accurate torque readings. Overtightening can stretch or break the bolt, while undertightening will result in a poor seal.

Service Note

Inspect the cylinder head gasket for signs of damage or blow-by, and check the flatness of the cylinder head and engine block mating surfaces.