Cylinder Head Machining Services

CYLINDER HEAD MACHINING SERVICES

High-Performance Diesel Solutions for Powerstroke, Cummins, and Duramax

At Choate Engineering Performance, we don’t just repair engines; we re-engineer them for maximum durability and output. Our cylinder head machining process is designed to withstand the extreme pressures of modern diesel performance. From daily-driven reliability to competition-grade power, we correct factory warping, ensure optimal valve-to-seat sealing, and reinforce structural integrity. Utilizing advanced CNC technology and specialized pressure testing, we ensure every head that leaves our shop is a masterwork of efficiency and durability.

Why Choose Choate Engineering Performance?

SPECIALIZED VALVE SEATING

We perform multi-angle valve jobs using CNC equipment to ensure a perfect concentric seal, maximizing airflow and heat transfer—critical for high-EGT diesel applications.

STRICT RA FINISH CONTROL

Modern MLS gaskets require an incredibly smooth surface. We measure the Ra (Roughness Average) to ensure it meets the exact specifications required for high-performance diesel gaskets.

HIGH-PRESSURE TESTING

Every head undergoes rigorous thermal and pressure testing to identify internal cracks or porosity that standard inspections miss.

PRECISION O-RINGING

For extreme boost levels, we offer O-ringing services, machining the head to accept specialized wire reinforcements for an unbreakable combustion seal.

TOTAL IN-HOUSE QUALITY CONTROL

Every stage of our machining process is performed in-house at our facility, ensuring every measurement meets our rigorous "Choate-Certified" standards.

DIESEL-SPECIFIC EXPERTISE

We understand the specific metallurgical requirements of cast iron and aluminum diesel heads, accounting for thermal expansion and high cylinder loads.

OUR SPECIALIZED MACHINE SERVICES

RESURFACING

We correct warped or heat-distorted heads by surfacing the deck to a mirror-like Ra finish. This provides the ultimate foundation for MLS gaskets, ensuring a leak-proof seal under high cylinder pressures.

Price: $375.00

O-RINGING

The gold standard for high-boost diesel builds. We machine a high-precision circular groove into the deck of the head. A stainless steel wire is seated into this groove, creating a localized high-pressure "crush point" against the head gasket to prevent blowouts.

Starting at $500

PORTING

Maximize your engine's volumetric efficiency. Our porting services improve airflow and reduce turbulence in the intake and exhaust runners, allowing for lower EGTs and significantly higher horsepower potential.

Price $1,000.00

CLEANING & INSPECTION

Before any machining begins, we perform a deep decontamination and a rigorous diagnostic phase. This includes a multi-stage cleaning to remove carbon and scale, followed by a thorough inspection for cracks, warping, or casting flaws.

Price: $300.00

Shipping & Logistics

We serve diesel enthusiasts nationwide. Getting your cylinder heads to our Tennessee facility is simple and secure.

  • Secure Packaging: We recommend heavy-duty, double-walled boxes or custom wooden crates to prevent damage during transit.
  • Preparation: Heads should be stripped of rockers and external hardware. We can handle valve spring removal in-house.
  • Residential Pickup: We offer convenient UPS and Freight pickup options directly from your home or shop.
  • Nationwide Rates: We leverage high-volume shipping discounts to provide competitive freight rates for your heads.

Frequently Asked Questions

How long does the process typically take?

Turnaround times vary based on shop volume, but most cylinder head services are completed within 2–4 weeks.

Should I surface my heads every time I replace the gasket?

Absolutely. Even minor warping can cause an MLS gasket to fail prematurely. Surfacing ensures the best possible seal.

What information do I need to provide?

Having your engine series (e.g., 6.7L Cummins) and year model is helpful, but our specialists can help you identify your heads if you aren't sure.

Service Request Checklist

To ensure your consultation is as efficient as possible, we recommend having the following information ready. However, it is perfectly fine if you don’t have all of this information available. Our diesel specialists are experts at identifying engine platforms and requirements. We are here to help you through every step of the process.

Engine Identification

  • Platform (6.0L, 5.9L, etc.)
  • Year Model

Head Condition

  • Blown Head Gasket?
  • Overheated?

Performance Goals

  • Target Boost Levels
  • Intended Use (Tow vs. Competition)

Warranty Information

Choate Engineering Performance stands behind every cut we make. Our cylinder head services are backed by a comprehensive workmanship guarantee.

  • Workmanship Guarantee: We warrant that all machining meets the specific tolerances required for your diesel platform.
  • Seal Guarantee: All heads are vacuum-tested before shipping to ensure 100% valve seat integrity.
  • Limitations: Warranty does not cover failures due to improper installation, lean tuning, or excessive overheating.
  • Inspection Window: Please inspect heads within 15 days of arrival to verify all specifications meet your build requirements.

Build Your Foundation Today

Give us a call today for a professional consultation.

Call 901-553-9847 Request a Quote