Pioneer Automotive PE158R Engine Expansion Plug Kit

The Pioneer Automotive PE158R is a complete engine expansion plug kit engineered to seal core holes in the cylinder block and prevent coolant and oil leaks. Also commonly referred to as freeze plugs or core plugs, expansion plugs are critical sealing components installed during engine assembly, rebuilds, and block repairs.

Manufactured by Pioneer Automotive Industries, a trusted name in powertrain components since 1946, the PE158R delivers OEM-quality fit and function. The steel construction provides durable, long-lasting performance under normal engine operating conditions and temperatures.

Key Features:

• Complete expansion plug kit with all plugs needed for a full engine block installation
• Steel construction for dependable durability in engine operating environments
• Seals cylinder block core holes created during the casting process
• Prevents coolant leaks that can lead to engine overheating and internal damage
• OEM-style design ensures correct fit and proper sealing
• Manufactured by Pioneer Automotive Industries, a trusted supplier since 1946

Proper installation is essential for effective sealing. The cylinder block bore surface must be clean and free of rust, scale, or debris before installation. Use the appropriate driver tool to press each plug evenly and squarely into its bore. Verify that each plug is seated flush with or slightly below the block surface. Refer to the engine-specific service manual for installation depth and sealant recommendations.