CPC Auto Welch Plug 45mm
The CPC Auto 45mm welch plug is an essential engine component designed to seal holes left during the casting process in engine blocks and cylinder heads. This cupped metal disc provides a reliable seal for cooling system passages.
Key Features
- 45mm diameter - precisely sized for specific engine applications
- Cup design - provides secure press-fit installation
- Automotive grade construction - designed for engine block and cylinder head applications
- Corrosion resistant options - available in brass or stainless steel materials
Function & Purpose
Welch plugs are installed in holes that were necessary during the engine block casting process to allow molten metal flow and sand removal. These plugs seal the cooling passages once the engine is assembled. They are commonly called core plugs, frost plugs, or freeze plugs in different regions.
Installation
The plug requires press-fit installation into the engine block hole. Professional installation is recommended to ensure proper seating and sealing. The cupped design allows the plug to expand when properly installed, creating a secure seal against cooling system pressure.