NGK 1250 Diesel Glow Plug

NGK Diesel Glow Plug 1250 Overview

NGK Glow Plug 1250 is a 12-volt diesel glow plug built with a metal-type construction, threaded terminal, and flat seat design. It is engineered for reliable cold-start performance in diesel ignition systems and is identified by part number 1250 and OE-style reference Y-208T.

NGK’s glow plug line reflects the company’s long history as an OE supplier for North American and import vehicles, with manufacturing standards focused on durability and consistent electrical performance. This makes the NGK 1250 a practical choice for diesel service work where correct voltage, thread size, and seat style matter.

Key Features

• Diesel glow plug for 12V systems
• Metal-type construction for dependable heat cycling
• Threaded terminal type with M5 terminal thread size
• Flat seat design for proper cylinder head sealing
• 12 mm hex size for service access
• Thread diameter: 0.469 in.
• Length: 2.95 in.
• Part number 1250 / OE reference Y-208T

Detailed Description

The NGK 1250 diesel glow plug is specified for diesel engines that require a 12-volt glow plug with a flat seat and threaded terminal connection. Its dimensions, including the 0.469-inch thread diameter, 12 mm hex size, and 2.95-inch length, help support correct fitment in applications that call for this configuration. For buyers searching for NGK glow plug 1250, Y-208T glow plug, or a 12V diesel glow plug for diesel engine starting, this part provides a direct replacement option when the original specification matches.

This part cross-references FEL-PRO 1250 for the same application.

What It Helps Address

• Hard starting in cold diesel conditions
• Extended cranking before engine fires
• Glow plug circuit faults caused by worn heating elements
• Uneven cold-start performance across cylinders
• Replacement needs for diesel ignition service on vehicles such as Ford F-250 and Ford F-350 diesel applications when the OE specification matches

Installation Notes and Tips

Verify system voltage, thread diameter, seat type, terminal style, and overall length before installation. Clean the cylinder head threads and inspect the glow plug bore for carbon buildup or damage before fitting the new plug. Use the correct torque procedure for the engine application and confirm electrical connection integrity after installation. For vehicle-specific searches, confirm the NGK 1250 matches the diesel engine specification for Ford F-250 or Ford F-350 before ordering.

Quality Assurance

NGK is a long-established OE supplier and manufacturer with broad coverage across automotive applications. The brand’s glow plug products are built to original equipment standards for durability and consistent operation in diesel ignition systems.