1983-1989 NAVISTAR & FORD DIESEL 6.9L & 7.3L IDI INJECTOR RETURN LINE KIT
Restore proper fuel recirculation and stop pesky leaks with this high-quality Injector Return Line Kit for 1983–1989 Ford 6.9L & 7.3L IDI diesel engines. Designed as a complete solution, this kit ensures your diesel injectors remain sealed, leak-free, and properly bled — improving fuel efficiency and engine longevity.
Compatible with both Ford and Navistar IDI diesel platforms, this kit includes premium-grade return hoses, injector caps, and high-temp O-rings to maintain fuel system integrity under high pressure and heat. Whether you're maintaining an old workhorse or performing a fresh injector install, this kit is a must-have.
Each component is designed to OEM specs for a direct fit and easy installation. Eliminate hard starts caused by air in the fuel system and restore proper operation with a reliable return line solution from a trusted brand.
Kit Includes:
- 7 ft. Injector return hose
- 16 - Injector return clams
- 8 - Return hose adapter
- 16 - Return line O-ring
- 8 - Injector washer
Key Benefits:
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Prevents fuel leaks and air intrusion
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Helps eliminate hard starts
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Improves cold starts and fuel system priming
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Resistant to high temperatures and diesel degradation
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Includes all necessary hardware for install
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OEM fitment for ease and peace of mind
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Supports long-term fuel system health
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Designed for Ford IDI & Navistar engines
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Cost-effective vs. piecing together parts
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Backed by a trusted diesel parts manufacturer
Truck Compatibility:
This injector return line kit fits the following applications:
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1983–1987 Ford F-250 / F-350 — 6.9L IDI V8 Diesel
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1988–1989 Ford F-250 / F-350 — 7.3L IDI V8 Diesel
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1983–1989 Ford E-Series Vans (E-250, E-350) — 6.9L & 7.3L IDI
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Navistar IDI engines (used in industrial/agriculture platforms; verify injector layout)
Does not fit 7.3L Power Stroke or Turbo IDI variants. For non-turbo IDI use only.
The Ford IDI Injector Return Line Kit is a direct-fit solution for sealing and maintaining the injector fuel return system in classic Ford 6.9L and 7.3L IDI engines. It prevents leaks, promotes consistent fuel return, and eliminates air intrusion — common culprits behind hard starts and poor performance. Ideal for restoration or preventive maintenance.
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California Proposition 65 Warning:
This product may expose you to chemicals including carbon black, silica, and/or other petroleum-based compounds, which are known to the State of California to cause cancer or birth defects or other reproductive harm.
For more information, visit: www.P65Warnings.ca.gov
