The CMT-EZ2 is a zinc pencil engine anode (E-2 type) with 7/16″-14 UNC thread, designed to protect internal engine cooling passages from galvanic corrosion. Installed in heat exchangers, engine blocks, or cooling jackets, it sacrifices itself to prevent corrosion damage to critical components.

This version is the anode rod only (no brass plug) and is commonly used as a direct replacement inside existing plug housings.

Key Features

E-2 pencil anode (7/16″-14 UNC thread)
Marine-grade zinc (saltwater optimized)
Designed for internal engine cooling systems
Helps prevent corrosion inside heat exchangers and water jackets
Direct replacement for common E-2 style anodes

Engine Compatibility

Designed for:

Inboard marine engines
Heat exchangercooled systems

Common on:

MerCruiser
Volvo Penta
Yanmar
Crusader
Westerbeke / Universal

Installed in:

Heat exchangers
Engine blocks
Cooling system ports

Protects:

Internal cooling passages
Heat exchanger tubes
Water jackets

Serial Number Fitment Notice

Always confirm:

Thread size (7/16″-14 UNC)
Length (~2″)
Diameter (~5/8″)
Whether your application requires anode only or complete plug assembly

Typical E-2 dimensions:

Length: ~2″
Diameter: ~5/8″

When This Part Needs Replacement

Anode is 50% or more consumed
Excessive scaling or buildup
Reduced cooling efficiency
Routine maintenance interval

Installation Notes

Remove plug and inspect regularly
Ensure clean threads and proper sealing
Do not over-tighten
Replace before full depletion to avoid debris in cooling system

Alternate / Superseded Part Numbers

Camp Company: CMT-EZ2
Martyr: CMEZ2
Tecnoseal: TEC-E2-Z
Common reference: E-2 / E2Z / 2055
Complete assembly (with plug) versions available

Parts Desk Insight

E-2 anodes are one of the most common internal engine zincs. Customers often forget them because theyre hiddenby the time overheating starts, the anode is usually already gone.