NGK 6244 Diesel Glow Plug

NGK Diesel Glow Plug 6244 Overview

NGK Glow Plug 6244 is a diesel glow plug built for 12-volt systems and OE-style service on select Isuzu applications. It uses a threaded terminal, tapered seat, and metal-type construction to support reliable cold-start performance in diesel engines.

Compatible with 1981-1987 Isuzu Pickup and 1984, 1986-1987 Isuzu Trooper applications, this NGK glow plug is a direct-fit option for owners searching for an Isuzu Pickup glow plug or Isuzu Trooper diesel glow plug replacement. Part number 6244 is also identified as Y-306R.

Key Features

• NGK Glow Plug line for diesel engine ignition service
• 12-volt system voltage with 5.00 voltage specification
• Metal-type construction for diesel glow plug applications
• Threaded terminal type with M4 terminal thread size
• Tapered seat design for OE-style fitment
• Hex size: 12 mm; thread diameter: 0.391 in; length: 3.52 in
• Part number 6244 / Y-306R

Detailed Description

NGK 6244 is engineered as a diesel glow plug for select Isuzu Pickup and Isuzu Trooper models. NGK has long supplied original equipment ignition components and applies that manufacturing experience to diesel glow plug service parts built to OE standards for durability and consistent operation. For buyers comparing Isuzu Pickup glow plug replacement options or searching by NGK 6244, this part provides the correct tapered-seat, threaded-terminal configuration for the listed vehicles.

This part cross-references AMS Automotive 6244 and interchange number 250202008 for the same application.

What It Helps Address

• Hard starting in cold diesel conditions
• Extended cranking before engine fire-up
• Rough initial idle after startup
• Glow plug warning or preheat system concerns tied to a worn plug
• Loss of consistent combustion heat during startup

Installation Notes and Tips

Verify the vehicle’s glow plug specification, terminal style, seat type, and thread dimensions before installation. Confirm the engine is a listed 12-volt diesel application and inspect the glow plug harness, connectors, and cylinder head threads for wear or contamination before fitting NGK 6244. Use proper torque procedures for tapered-seat glow plugs to avoid damage.

Quality Assurance

NGK is a long-established OE supplier with broad North American manufacturing and distribution support, and this glow plug is produced to maintain original-equipment standards for durability and operational performance.