Product Overview
IVOK solid brass cup type engine freeze plugs (expansion/core plugs) are designed for automotive engine cylinder blocks and cylinder heads. Their primary function is to securely seal the core casting holes of the engine coolant passages, preventing coolant and antifreeze leakage while maintaining proper cooling system pressure.
Manufactured from high-grade solid brass, these freeze plugs offer exceptional resistance to rust, electrolytic corrosion, and engine coolant additives compared to standard mild steel plugs. Built with precise outer diameter tapers and uniform wall thickness, IVOK core plugs provide a tight, dependable interference press-fit during engine assembly, rebuilding, and maintenance.
Key Features
- Solid Brass Construction: Delivers superior corrosion and rust resistance against engine coolant, water, and antifreeze mixtures.
- Secure Press-Fit Retention: Precision outer diameter taper ensures tight, leak-proof interference seating in cylinder block casting holes.
- Complete Size Coverage: Available in standard metric (6mm–72mm) and imperial dimensions to fit diverse passenger and commercial engines.
- Direct Engine Overhaul Fit: Manufactured to strict dimensional standards for straightforward installation during engine rebuilds and repairs.
OEM/ODM Customization Process
IVOK offers different material and customization options to meet specific automotive sealing requirements.
Requirement & Specification Confirmation
Receive OE numbers, technical drawings, samples or product specifications. Confirm dimensions, structure and application requirements.
Material & Compound Selection
Select suitable materials such as NBR, FKM and ACM according to operating conditions. Confirm hardness, color and other specifications.
Tooling & Sample Approval
Develop or adjust tooling when required. Produce samples for dimensional checks and customer approval before mass production.
Mass Production & Quality Inspection
Manufacture products according to confirmed specifications, with quality checks throughout the production process.
Private Label & Custom Packaging
Arrange customized logos, labels and packaging according to your requirements, followed by order packing and shipment.
Production Process
From material preparation to final inspection, each step follows established production procedures.
Looking for the Right Freeze Plug?
Send us your OE number, drawing or sample. Our team will help confirm the product specifications.