CAT C7.1 Cylinder Head Assembly 425-3316 For CAT 323D2 / 320D2 / Excavators

When a CAT excavator powered by the C7.1 diesel engine starts showing problems such as coolant loss, white exhaust smoke, overheating, or loss of compression, the issue is often related to a damaged or cracked cylinder head.
In many cases, replacing the cylinder head assembly becomes a necessary step during engine overhaul or major repair.
The CAT C7.1 Cylinder Head Assembly (Part Number 425-3316) is designed for D2 series excavators and built to handle heavy-duty construction and mining operations. With precision machining and reinforced structure, it helps restore engine performance and reliability in demanding working environments.

Product Overview

CAT C7.1 Cylinder Head 425-3316

The 425-3316 cylinder head assembly is used on the Caterpillar C7.1 inline 6-cylinder diesel engine commonly installed in CAT D2 series excavators.
This cylinder head is engineered with precise control of:

• Cylinder bore spacing
• Valve seat angles
• Combustion chamber geometry

These design features help ensure:

• Proper combustion sealing
• Improved air intake efficiency
• Stable engine power output
• Reduced compression leakage

For machines undergoing engine overhaul or breakdown repair, the 425-3316 cylinder head is one of the most critical replacement components.

Compatible Engines and Machines

Engine Model

Caterpillar C7.1 Diesel Engine

Compatible Excavator Models

• CAT 323D2 Excavator
• CAT 320D2 Excavator
• CAT 326D2 Excavator
• CAT 329D2 Excavator

These machines are widely used in:

• Earthmoving operations
• Mining sites
• Road construction projects
• Infrastructure development

The cylinder head is designed to maintain stable performance even under long working hours, strong vibration, and heavy engine loads.

Quality Assurance & Order Verification

We supply genuine CAT engine parts manufactured according to Caterpillar’s original production standards and quality control processes.
To ensure the correct part is supplied, we confirm key information with customers before shipment, including the part number, engine model, and engine nameplate details.

Before delivery, we provide actual product photos for customer confirmation to avoid ordering mistakes.
For customers who require additional assurance, third-party inspection services are also supported to verify part number markings and product condition.

Our goal is to ensure every part supplied matches the customer’s equipment and helps reduce equipment downtime.

Why Choose Our CAT C7.1 Cylinder Head

For fleet operators, maintenance contractors, and equipment service companies, choosing a reliable parts supplier is critical to reducing equipment downtime.
We support customers with genuine CAT engine parts and a clear verification process to ensure correct supply.

Key advantages of working with us:

✔ Genuine CAT Parts Supply

We provide original CAT engine components manufactured under Caterpillar’s production standards.

✔ Part Number & Engine Verification

Before quotation, we confirm the part number and engine nameplate details to ensure compatibility.

✔ Pre-Shipment Photo Confirmation

Actual product photos are sent before shipping so customers can verify the part before delivery.

✔ Third-Party Inspection Supported

Independent inspection companies can verify part numbers, packaging, and product condition.

✔ Stable Pricing & Reliable Delivery

Thanks to our long-term cooperation with CAT supply channels in China, we are able to offer stable pricing and delivery timelines.

✔ Support for Long-Term Mining Projects

We support equipment maintenance companies and mining operations with stable parts supply and technical support.

FAQ

Q1. What engine uses the 425-3316 cylinder head?

The 425-3316 cylinder head assembly is designed for the Caterpillar C7.1 diesel engine used in several CAT D2 series excavators.

Q2. What machines use the CAT C7.1 engine?

The C7.1 engine is commonly installed in machines such as:

CAT 320D2 Excavator

CAT 323D2 Excavator

CAT 326D2 Excavator

CAT 329D2 Excavator

Q3. When should a cylinder head be replaced?

A cylinder head should be inspected or replaced if the engine shows signs of:

Coolant loss
White exhaust smoke
Overheating
Low compression
Cylinder head cracking

Packaging & Shipping

Each engine undergoes strict appearance and serial number inspection before shipment and is packaged in reinforced steel-framed wooden boxes with moisture-proof and orientation labels. Key components such as ECM,pistons, turbocharger and fuel injectors etc, are packaged in independent shock-proof containers and are accompanied by export certificates.
We maintain long-term cooperation with international freight forwarders and offer trade terms such as CIF, FOB, and DDP according to customer requirements. Customers in Africa,latin america and Southeast Asia usually choose LCL or FCL shipping by sea, with an average delivery cycle of 18–25 days.

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