Standard Ignition SK4 Fuel Injector Seal Kit

Fuel Injector Seal Kit for Nissan and Isuzu

Standard Ignition SK4 is a fuel injector seal kit for multi-port fuel injection service on select Nissan and Isuzu applications. It is built with black plastic components and the seal dimensions needed for injector sealing service on supported vehicles, including Nissan 280ZX, 300ZX, Maxima, 200SX, Pulsar NX, 810, and Isuzu Impulse.

Key Features

• Fuel injector seal kit for MFI service
• Black plastic construction
• Includes one O-ring seal configuration
• Seal dimensions: 8.636 mm inside diameter and 13.97 in outside diameter for Seal 1; 20.32 mm inside diameter, 27.178 mm outside diameter, and 8.128 in thickness for Seal 2
• Compatible with select Nissan and Isuzu fuel injector rail pack applications
• Standard Ignition SK4 part number for direct reference

Detailed Description

Standard Ignition SK4 is a fuel injector seal kit used in multi-port fuel injection service where injector sealing integrity matters. This kit is listed for select Nissan and Isuzu vehicles, including 1977-1981 Nissan 810, 1979-1983 Nissan 280ZX, 1980-1988 Nissan 200SX, 1982-1986 Nissan Maxima, 1983-1984 Nissan Pulsar NX, 1984-1986 Nissan 300ZX, 1985-1987 Isuzu Impulse, 1987 Nissan Pulsar NX, 1987-1988 Nissan Maxima, 1987-1988 Nissan 200SX, and 1987-1989 Nissan 300ZX. The SK4 part number is also a useful reference when sourcing the correct injector seal kit for these applications.

This part cross-references 2-12307 and 800-9208 for the same application.

Common Service Issues Addressed

• Fuel seepage around injector seals
• Vacuum leaks at the injector rail interface
• Hard starting caused by poor injector sealing
• Rough idle related to intake air leakage
• Fuel odor from worn injector O-rings and seals

Installation Notes and Tips

• Verify injector and rail dimensions before installation, especially on Nissan 280ZX, 300ZX, and Maxima applications.
• Inspect the injector bore and rail surfaces for wear, corrosion, or debris before fitting new seals.
• Use clean engine oil or a suitable lubricant on the seals during assembly to reduce tearing.
• Confirm the injector seats fully after installation and check for leaks after startup.
• Follow the vehicle service procedure for rail removal and reinstallation on MFI systems.

Quality Assurance

Standard Ignition SK4 is cataloged to the listed fitments and seal dimensions for accurate service selection. Standard Ignition SK4 is a direct-reference part number for fuel injector seal service on supported Nissan and Isuzu applications.