Toyota Diesel 1KZTE OEM Injection Pump Drive Seal 90311-58006

Product Overview

Genuine OEM Toyota Injection Pump Drive Gear Seal 90311-58006, compatible with Toyota Land Cruiser, Land Cruiser Prado, Hilux, Hilux Surf, 4Runner, Hiace, Grand Hiace, Granvia, Coaster, Regius, and Regius Ace models equipped with 1KZ-TE, 1KZT, 1HZ, 1HZT, 1HDT, 1HD-FT, and 1PZ diesel engines. This Toyota Type T oil seal prevents fuel and oil contamination at the injection pump drive shaft and ensures a clean, leak-free sealing surface throughout the service life of your diesel engine. Replacing the 90311-58006 during every timing belt service is the single most cost-effective step you can take to protect your injection pump drive gear, timing cover, and timing belt from oil contamination damage on these legendary Toyota diesel platforms.

OEM Part Number(s):

• 90311-58006 (current Toyota OEM)
• 9031158006 (alternate format, same part)

 

Key Features & Benefits

• Stops Injection Pump Leaks at the Source: Seals the injection pump drive shaft at the timing cover, preventing oil from migrating into the timing belt bay and contaminating the belt
• Genuine Toyota Quality: Nitrile rubber lip seal with precision metal casing, manufactured to Toyota OEM specifications and validated for the elevated operating temperatures of turbo diesel applications
• Exact Dimensional Fit: 58 x 72 x 9 mm sealing geometry precisely matched to the Toyota injection pump drive gear housing bore on 1KZ-TE, 1HZ, 1HDT, 1HD-FT, and 1PZ engines
• Timing Service Efficiency: Replace as a matter of course during any timing belt service, since the drive shaft is already accessible, eliminating any need for a costly repeat teardown
• Value Insurance Against Repeat Labor: At a fraction of the cost of a timing belt job, replacing this seal eliminates the risk of paying 6 to 10 hours of labor a second time due to a failed seal between services

 

Technical Specifications

Part Type: Injection Pump Drive Gear Oil Seal (Type T Oil Seal)
Toyota Classification: SEAL, TYPE T OIL (FOR INJECTION PUMP)
Dimensions: 58 mm inner diameter x 72 mm outer diameter x 9 mm width
Weight: 0.03 kg (0.07 lbs)
Material: Nitrile rubber lip seal with precision metal casing
Position: Injection pump drive gear shaft, front timing cover
Engine Compatibility: 1KZ-TE, 1KZT, 1HZ, 1HZT, 1HDT, 1HD-FT, 1PZ

Fitment

Year	Model	Engine
1993-2002	Land Cruiser 90 Series	1KZ-TE 3.0L turbo diesel
1993-2002	Land Cruiser Prado 90 Series	1KZ-TE 3.0L turbo diesel
1996-2009	Land Cruiser Prado 120 Series	1KZ-TE 3.0L turbo diesel
1990-2007	Land Cruiser 70 Series	1HZ 4.2L diesel
1990-2007	Land Cruiser 70 Series	1PZ 3.5L diesel
1990-2007	Land Cruiser 80 Series	1HZ 4.2L diesel
1990-2007	Land Cruiser 80 Series	1HDT 4.2L turbo diesel
1993-2002	4Runner / Hilux Surf	1KZ-TE 3.0L turbo diesel
1989-2005	Hilux	1KZ-TE 3.0L turbo diesel
1989-2005	Hilux	1HZ 4.2L diesel
1993-2004	Hiace	1KZ-TE 3.0L turbo diesel
1993-2004	Hiace	1HZ 4.2L diesel
1995-2002	Grand Hiace / Granvia	1KZ-TE 3.0L turbo diesel
1993-2002	Coaster	1HZ 4.2L diesel
1993-2002	Coaster	1HDT 4.2L turbo diesel
1993-2002	Regius / Regius Ace	1KZ-TE 3.0L turbo diesel
1993-2002	Touring Hiace	1KZ-TE 3.0L turbo diesel

Important: Verify your engine code before ordering. The 1KZ-TE and 1KZT use this same seal. The 1HZ, 1HDT, and 1HD-FT also share this part number. The 1PZ engine is confirmed compatible. Fitment years are provided as a general guide and may vary by chassis and market. Always confirm using your vehicle's VIN or engine stamping.

Installation & Maintenance

Installation Difficulty: Intermediate to Advanced (requires timing cover removal)
Tools Required: Socket set, seal driver or appropriate socket for pressing, clean cloths, light engine oil for seal lip lubrication prior to installation
Professional Installation: Recommended. This seal is accessed only with the timing cover removed. If you are already performing a timing belt service, adding this seal takes only a few minutes of additional work. If this is a standalone repair, professional assistance will save significant time.

Maintenance Tips:

• Replace the 90311-58006 at every timing belt service interval, regardless of whether it is visibly leaking. The cost of the seal is negligible compared to the labor required to access it a second time.
• Lightly lubricate the seal lip with clean engine oil immediately before installation to prevent tearing the rubber on initial startup.
• Inspect the injection pump drive gear shaft surface for scoring or grooves before installing the new seal. A scored shaft will cause a new seal to leak, regardless of the seal's quality.
• After installation, run the engine to full operating temperature and inspect the timing cover area for seepage before closing up the engine bay.

 

Frequently Asked Questions

Q: What exactly does the Toyota injection pump drive seal 90311-58006 do?
A: The 90311-58006 is a Type T oil seal that sits at the injection pump drive gear shaft, where it passes through the front timing cover. It creates a pressure-tight barrier that prevents engine oil from escaping along the shaft and migrating into the timing belt bay. In 1KZ-TE, 1HZ, 1HDT, 1HD-FT, and 1PZ Toyota diesel engines, oil contamination of the timing belt is a serious failure mode, as these are interference engines where a belt failure results in catastrophic valve and piston damage.

Q: Is this the same seal as the injection pump shaft seal that seals the pump body itself?
A: No. The 90311-58006 seals the injection pump drive gear shaft at the engine timing cover, not the pump shaft inside the pump body. The internal injection pump seals are a separate repair, typically addressed using a pump rebuild or seal kit. The 90311-58006 is the external drive gear seal and is a standard replacement item during any timing belt service.

Q: Does the 90311-58006 fit both the 1KZ-TE turbo diesel and the naturally aspirated 1HZ diesel?
A: Yes. Toyota uses the same 90311-58006 seal across multiple diesel engine families, including the 1KZ-TE, 1KZT, 1HZ, 1HZT, 1HDT, 1HD-FT, and 1PZ. All of these engines share the same injection pump drive gear shaft diameter and timing cover bore dimensions of 58 x 72 x 9 mm, making 90311-58006 the correct replacement across this entire Toyota diesel family.

Q: Should I replace this seal if I am not seeing any oil leak?
A: Yes. Toyota diesel technicians and experienced Toyota communities consistently recommend replacing the 90311-58006 during every timing belt service, regardless of visible leakage. The timing cover must be removed to access the timing belt, meaning the injection pump drive seal is already exposed at zero additional labor cost. A seal that looks fine today can begin seeping within 50,000 to 80,000 km under the heat cycling and pressure of diesel operation. Replacing it proactively eliminates the risk of an oil-contaminated timing belt between services.

Q: What is the difference between the injection pump drive seal and the camshaft seal on the 1KZ-TE?
A: These are two separate seals. The injection pump drive seal (90311-58006) seals the injection pump drive shaft as it exits through the timing cover. The camshaft seal (90311-32020) seals the camshaft nose at the front of the cylinder head. Both seals are accessible during a timing belt service on the 1KZ-TE, and both should be inspected and replaced during the same job to avoid a repeat teardown.

Related Toyota Parts You May Need

• Timing Belt (13568-69085 for 1KZ-TE) - Primary reason for accessing this seal; replace simultaneously at the recommended service interval
• Camshaft Oil Seal (90311-32020) - Seals the camshaft nose at the timing cover; always replace alongside the injection pump drive seal during the same service
• Crankshaft Front Oil Seal (90311-50051) - Third sealing point accessible with the timing cover off; replace as a set for complete front seal renewal
• Hydraulic Tensioner (13540-67020 for 1KZ-TE) - Tension device for the timing belt; recommended replacement during major timing service to prevent premature belt failure
• Timing Belt Idler Pulley - Inspect bearing condition at timing service; replace if any roughness is detected to prevent bearing failure between service intervals
• Water Pump - Driven by the timing belt on 1KZ-TE engines; catastrophic failure between service intervals is eliminated by replacing the water pump during the timing service

 

Common Symptoms of a Failed or Leaking Injection Pump Drive Seal

• Oil is seeping from the front of the engine near the timing cover on the injection pump drive side
• Oil contamination found on the timing belt or inside the timing cover during a belt inspection or replacement
• Slow, unexplained oil loss with no visible external leak at the valve cover, oil pan, or rear main seal
• Oily residue or dark streaking on the timing cover face or engine block below the injection pump drive area
• Timing belt showing oil saturation or glazing during routine inspection, indicating oil migration from one or more front seals

 

Why Replace Your Toyota Injection Pump Drive Seal with OEM Part 90311-58006

On Toyota's 1KZ-TE, 1HZ, 1HDT, 1HD-FT, and 1PZ diesel engines, the injection pump drive gear seal is a small component that protects a very expensive system. These engines are interference designs, meaning a timing belt failure caused by oil contamination does not simply leave you stranded. It bends valves, damages pistons, and can require a complete engine rebuild at a cost that dwarfs any maintenance investment many times over.

The 90311-58006 measures 58 x 72 x 9 mm and weighs just 0.03 kg. Its nitrile rubber lip is engineered to maintain precise sealing contact with the injection pump drive shaft under thermal cycling, vibration, and diesel fuel exposure conditions that are routine for these platforms. Aftermarket seals in this size class are available, with NOK being a well-regarded Japanese seal supplier, but the Toyota OEM seal is manufactured to the exact lip hardness, spring tension, and dimensional tolerances validated for these specific engines. For a component that sits between your timing belt and oil contamination, using the genuine OEM seal eliminates one more variable from a critical sealing system.

The 6 to 10 hours of labor required to access the timing cover on a 1KZ-TE or 1HZ diesel is the same whether you replace one seal or three. Do not leave the injection pump drive seal in place during a timing belt service. Given the cost of this single OEM seal, the only logical choice is to replace the front seal every time the timing cover comes off. Order genuine Toyota 90311-58006 today and give your diesel the protection it deserves.