Detroit Diesel Series 60 12.7L Cylinder Head Parts Catalog

The Detroit Diesel Series 60 12.7L engine is one of the most trusted heavy-duty diesel engines ever built. Known for its efficiency, durability, and long service life, the 12.7L version became the backbone of many industrial, marine, and on-highway applications throughout the 1990s and early 2000s. The engine’s cylinder head plays a vital role in maintaining compression, airflow, and overall performance, making it one of the most critical areas for maintenance and rebuild work.

At Diesel Pro Power, we provide a complete catalog of Detroit Diesel 60 Series 12.7L cylinder head parts—from full replacement heads to gaskets, valves, guides, and adjustment hardware. With global shipping to more than 180 countries and the trust of 40,000+ satisfied customers, we make sourcing these critical parts fast, reliable, and simple.

The Importance of the Cylinder Head in the Detroit Diesel 60 Series 12.7L

The cylinder head in the Detroit Diesel 60 Series 12.7L engine is not just a simple housing. It:

• Seals the combustion chamber with the head gasket to maintain compression.

• Provides a structure for intake and exhaust valves, injectors, and rocker assemblies.

• Ensures proper cooling and oil circulation across high-stress combustion zones.

• Influences efficiency, emissions, and durability.

A properly functioning cylinder head ensures stable performance and prevents costly failures like head warping, gasket leaks, or valve damage. That’s why replacement and service parts for this component remain in high demand worldwide.

Complete Cylinder Head Assemblies for Detroit Diesel 60 Series 12.7L

• Detroit Diesel Cylinder Head – Rebuilt with Valves & Springs (Non-EGR)
  A rebuilt cylinder head option offers exceptional value while meeting OEM-level specifications. These units are rebuilt with all-new valves and springs, pressure tested, and prepared for immediate installation.

• Ideal for non-EGR engines prior to emissions requirements.

• Includes a refundable core deposit to encourage sustainability.

• Detroit Diesel Cylinder Head – New with Valves Installed
  For those who prefer brand-new equipment, Diesel Pro Power offers a new Detroit Diesel Series 60 cylinder head with valves pre-installed. This option saves time during installation and guarantees long-term performance.

• Perfect for a full top-end rebuild or when existing heads show signs of cracks, excessive wear, or overheating.

Head Gaskets and Gasket Sets for the Series 60 12.7L

No cylinder head rebuild is complete without fresh sealing components. We offer:

• Head Gaskets – Designed to provide a perfect seal between the cylinder block and head. Prevents coolant, oil, and compression leaks.

• Head Gasket Sets – Bundled kits that include multiple seals needed for head reinstallation.

• Overhaul Gasket Kits – Complete top-to-bottom sealing packages for comprehensive rebuilds.

Choosing the right gasket is critical because the 12.7L operates under high compression ratios, and any sealing failure can lead to overheating, power loss, or catastrophic failure.

Rocker Arm and Injector Adjusting Hardware

Fine adjustment of valve timing and injector operation is essential in the Detroit Diesel 60 Series. Diesel Pro Power supplies:

• Exhaust Rocker Arm Adjusting Screws – Built to OEM specifications for precise exhaust valve adjustment.

• Intake Rocker Arm Adjusting Screws – Designed to ensure accurate intake valve operation.

• Injector Adjusting Screws – Key for fine-tuning fuel injection and maximizing combustion efficiency.

Correct valve lash adjustment, made possible with these components, prolongs engine life and ensures smooth operation.

Rocker Cover Gaskets and Sealing Solutions

Rocker cover gaskets keep oil contained in the top end of the engine. Options vary by bolt pattern:

• 4-Bolt Rocker Cover Gaskets – Common on earlier models.

• 10-Bolt Rocker Cover Gaskets – Found on later variations.

Using the correct gasket type prevents oil leaks, maintains cleanliness, and helps with proper crankcase ventilation.

Cylinder Head Fastening: Head Bolts and Isolators

Cylinder head bolts must withstand extreme clamping loads. Our catalog includes:

• Head Bolts – 38 per engine, precision-engineered for the 12.7L.

• Isolators and Washers – Available for early (pre-1996) and mid-production (1996–1999) engines to control vibration and protect mounting points.

Replacing head bolts during rebuild is always recommended because used bolts can stretch and compromise sealing pressure.

Valves and Valve Kits for the 12.7L

Valves are critical for airflow and combustion control. Diesel Pro Power offers:

• Intake Valves – For fresh air entry into the cylinder.

• Exhaust Valves – For removing combustion gases.

• Valve Kits (Intake & Exhaust) – Pre-assembled packages that include valves and related hardware, ensuring simplified rebuilds.

We also carry EGR-specific exhaust valve kits, reflecting changes in later emission-compliant models.

Valve Seats, Guides, and Stem Seals

Supporting components are just as important as the valves themselves.

• Valve Seats (Intake & Exhaust) – Hardened inserts that provide long wear life and heat resistance.

• Valve Guides – Precision-machined inserts that ensure smooth valve movement. Available in multiple diameter options to match production tolerances.

• Valve Stem Seals – Prevent oil from entering the combustion chamber, reducing emissions and oil consumption.

When rebuilding a head, replacing these small but crucial components guarantees reliable operation.

Valve Springs, Spring Seats, and Rotocoils

Each valve requires a properly tensioned spring to close effectively. Our catalog includes:

• Valve Springs – Built for Series 60 load requirements.

• Spring Seats – Secure placement and protect the cylinder head casting.

• Rotocoils (Valve Rotators) – Rotate valves slightly with each cycle, promoting even wear and extending valve life.

Injector Tubes for Series 60 12.7L

Injector tubes ensure a sealed fuel delivery path from injectors to the combustion chamber. Diesel Pro Power offers OEM-grade replacements that maintain fuel system integrity and efficiency.

Manifold Gaskets and Fasteners

Airflow management is vital in turbocharged diesel engines. We stock:

• Head-to-Manifold Gaskets – Secure exhaust flow from the cylinder head to the exhaust manifold.

• Exhaust Manifold Mounting Gaskets – High-heat sealing solutions.

• Exhaust Manifold Screws – Heavy-duty fasteners engineered to withstand extreme heat cycles.

Specialized Tools: Feeler Gauges

Every valve adjustment requires precision. We supply:

• Feeler Gauges (.002"–.025") – Essential for calibrating valve lash and injector settings.

This tool ensures accuracy in top-end maintenance, protecting the engine from misfires, premature wear, and efficiency losses.

Why Choose Diesel Pro Power for Detroit Diesel 60 Series 12.7L Parts

When it comes to sourcing Detroit Diesel Series 60 parts, Diesel Pro Power stands apart:

• Global Shipping – Fast delivery to more than 180 countries.

• Trusted by 40,000+ Customers – A proven track record of reliability.

• Complete Catalog – From full cylinder heads to the smallest valve locks, everything is available in one place.

• Marine & Industrial Focus – Unlike general suppliers, we specialize in continuous-duty diesel applications.

• Expert Support – Our team can help identify the right head, gasket set, or valve for your specific engine configuration.