3 Cylinder Injector Seal Kit with Heat Shield for Carrier Engine CT2.29 CT3.44 CT2-29-TV CT3-44-TV Transicold Refrigeration Unit Supra 422 444 450 522 544 550 722 744 750 822 844 850

3 Cylinder Injector Seal Kit with Heat Shield for Carrier Engine CT2.29 CT3.44 CT2-29-TV CT3-44-TV Transicold Refrigeration Unit Supra 422 444 450 522 544 550 722 744 750 822 844 850

This injector seal kit is engineered as a direct replacement for the Carrier Engine CT2.29 CT3.44 CT2-29-TV CT3-44-TV Transicold Refrigeration Unit Supra 422 444 450 522 544 550 722 744 750 822 844 850. Manufactured to meet or exceed OEM specifications, it delivers reliable performance in demanding conditions. Each unit is tested for fuel flow, pressure rating, and durability before leaving the factory to ensure consistent quality across every order.

Vehicle Compatibility

Replaces OEM Part Numbers

94-4201 • 944201 • 944-201 • 25-39309-00 • 253930900 • 25-3930900 • 25-34216-00 • 253421600 • 25-3421600 • 25-39147-00 • 253914700 • 25-3914700

Signs You Need a Replacement

If your equipment is showing any of these symptoms, the injector seal kit may be the cause:

• Fuel leak at injector base — Copper washers lose their crush seal over time. If you see dampness around the injector, the seals need replacement.
• Fuel in coolant or oil — A failed combustion seal allows fuel pressure to escape into adjacent passages. This is a serious issue that requires immediate attention.
• Loss of compression on one cylinder — When the copper sealing washer fails, combustion gases blow past the injector body instead of pushing the piston.

Installation Notes

Clean the injector bore thoroughly before installing new seals. Any carbon or debris left in the bore prevents the copper washer from seating properly, causing a compression leak. Use a wire brush or bore cleaning tool, then wipe with a lint-free cloth. Install the seals in the order specified in the kit — the heat shield goes on first, then the copper washer, then the O-rings. Torque the injector to the specified value and recheck after running the engine under load.

Frequently Asked Questions

Will this fit my Carrier 422?
Yes. This part is designed to fit the Carrier 422, 444, 450, 522 among other models listed in the compatibility table above. Verify your specific model and engine code before ordering to ensure the correct fit.

Can I cross-reference 94-4201 with 944201?
Yes. Both 94-4201 and 944201 are interchangeable OEM numbers for this part. They refer to the same component with the same specifications, just different part number revisions.

Do I need to replace the seals when removing injectors?
Yes. The copper sealing washers are single-use – they crush to form the seal and cannot be reused. Rubber O-rings harden over time from heat and fuel exposure. Even if the old seals look fine, they won’t seal properly on reassembly.

What tools do I need to install this on a Carrier?
Standard metric hand tools will handle most of the job – sockets, wrenches, and a torque wrench. For Carrier equipment, check the specific service manual for any special tools or torque values.

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