Toyota Diesel 2L 2L-T 2L-TE 3L 5L 5LE Water Pump 16100-59155

Product Overview

Genuine OEM Toyota Water Pump Assembly compatible with 1983-2006 Toyota Hilux, Hiace, Land Cruiser, 4Runner, and commercial vehicles equipped with 2L, 2LT, 2L-TE, 3L, and 5L diesel engines. This essential cooling system component ensures reliable coolant circulation and optimal engine operating temperatures for Toyota's legendary diesel platforms. This complete assembly includes the gasket and mounting hardware for comprehensive replacement during timing belt service intervals.

OEM Part Number(s):

• 16100-59155 (primary)
• 16100-59257 (current supersession)
• 16100-59255 (superseded)
• 16100-59256 (superseded)
• 16100-59066 (early application)

 

Key Features & Benefits

• Perfect Fit: Engineered specifically for late-model Toyota 2L-II, 2LT-E, 3L, and 5L diesel engines with bucket and shim valve train design
• Quality Assurance: Cast aluminum construction with precision-machined impeller for superior coolant flow and heat dissipation
• Performance: Maintains optimal engine temperatures between 180-200°F under all operating conditions, including heavy-duty commercial use
• Complete Assembly: Includes water pump, gasket, and mounting studs for comprehensive installation

 

Technical Specifications

Part Type: Engine Water Pump Assembly
Material: Cast aluminum body with precision-machined impeller
Engine Compatibility: 2L (2.4L), 2LT (2.4L turbo), 2L-II, 2LT-E, 3L (2.8L), 5L (3.0L), 5L-E diesel engines
Operating Temperature: 180-220°F (82-104°C)
Service Interval: Replace every 100,000 km (62,000 miles) or with timing belt service

Fitment

Year	Model	Engine
1988-2005	Toyota Hilux (N80, N140, N165, N170)	2L-II, 2LT-E, 3L, 5L diesel
1989-2006	Toyota Hiace (H100, H200 series)	2L, 2LT, 3L, 5L, 5L-E diesel
1988-2002	Toyota 4Runner / Hilux Surf (N120)	2LT-E turbo diesel
1990-2002	Toyota Land Cruiser Prado (J70, J90)	2LT-E, 3L, 5L diesel
1988-2001	Toyota Dyna / ToyoAce (100, 150 series)	2L, 3L, 5L diesel
1988-1999	Toyota Crown / Cresta / Mark II (X70, X80, X90)	2LT, 2LT-E, 2L-THE turbo diesel
1995-2004	Toyota Granvia / Grand Hiace	3L diesel
1997-2004	Toyota Fortuner / Kijang (select markets)	5L, 5L-E diesel

Important: This water pump is designed for late-model 2L-II, 2LT-E, 3L, and 5L engines featuring bucket and shim valve train (stamped steel valve cover). Earlier 2L/2LT engines with rocker arm design (cast aluminum valve cover) may require different part numbers. Verify the engine code and valve cover type before purchase. Compatible with both 2WD and 4WD configurations.

Installation & Maintenance

Installation Difficulty: Intermediate to Advanced
Tools Required: Socket set, timing belt tools, torque wrench, coolant drain pan, pulley holder tool
Professional Installation: Recommended - requires timing belt removal and proper coolant system bleeding

Maintenance Tips:

• Replace the water pump every 100,000 km (62,000 miles) or with each timing belt replacement interval
• Always replace the timing belt, tensioner, and idler pulleys when servicing the water pump
• Use genuine Toyota Long Life Coolant (red) or equivalent silicate-free coolant for optimal corrosion protection
• Properly bleed the cooling system after installation to prevent air pockets and overheating
• Inspect coolant hoses, radiator cap, and thermostat during water pump service for comprehensive maintenance

Frequently Asked Questions

Q: What's included in the package?
A: This assembly includes the complete water pump unit, gasket, and four mounting studs. Timing belt components and coolant are sold separately.

Q: How difficult is installation?
A: Installation requires intermediate to advanced mechanical skills and typically takes 3-5 hours. The timing belt must be removed to access the water pump, which requires precise alignment of the timing marks during reassembly. Professional installation is recommended unless you have experience with timing belt service.

Q: Will this water pump fit my early 2L engine?
A: This pump is designed for late-model 2L-II engines (1988+) with bucket and shim valve train, identifiable by the stamped steel valve cover. Early 2L engines (1982-1987) with rocker arm design and cast aluminum valve cover may require different part numbers.

Q: When should I replace my water pump?
A: Toyota recommends water pump replacement every 100,000 km or 5 years, whichever comes first. Many technicians recommend replacement with every timing belt service to prevent unexpected failure. Water pump reliability typically decreases after 140,000 km in these engines.

Related Toyota Parts You May Need

• Timing Belt Kit - Essential replacement during water pump service for complete cooling system maintenance
• Timing Belt Tensioner and Idler Pulleys - Prevent premature belt failure and ensure proper tension
• Radiator Upper and Lower Hoses - Inspect for cracks and replace if showing age during pump service
• Thermostat Assembly (180°F or 190°F) - Critical for proper temperature regulation in diesel engines
• Toyota Long Life Coolant (Red) - Genuine coolant provides superior corrosion protection for aluminum components
• Radiator Cap (0.9 or 1.1 bar) - Maintains proper system pressure for optimal cooling performance

 

Common Symptoms of Water Pump Failure

• Coolant leaking from weep hole at bottom of water pump housing
• Engine overheating during normal operation or under load
• Grinding or squealing noise from front of engine indicating bearing failure
• Visible coolant residue around water pump area or timing belt cover
• Steam or coolant smell from engine bay during or after operation
• Rough bearing rotation when manually checking pump pulley for play

 

Why Replace Your Toyota Diesel Water Pump

Critical Cooling System Component: The water pump is the heart of your diesel engine's cooling system, responsible for circulating coolant through the engine block, cylinder head, and radiator. Toyota's 2L, 3L, and 5L diesel engines are renowned for exceptional reliability and longevity, but water pump failure can lead to catastrophic engine damage through overheating.

These legendary diesel engines powered countless Toyota Hilux trucks, Hiace vans, and Land Cruisers through demanding commercial use and harsh conditions worldwide. However, water pump reliability typically begins to decline around 140,000 km due to bearing wear and seal degradation. Preventive replacement during timing belt service intervals is the most cost-effective maintenance strategy.

The integrated timing belt design of these engines means water pump replacement requires timing belt removal, making it economically sensible to replace both components simultaneously. This genuine OEM water pump maintains the precise tolerances and quality standards that made Toyota diesel engines legendary for million-kilometer service life.

Don't risk catastrophic engine damage from water pump failure. This genuine Toyota OEM component ensures reliable cooling system performance and protects your valuable diesel engine investment. Professional installation with proper timing belt service provides peace of mind for another 100,000 km of dependable operation.

Invest in genuine Toyota OEM quality for your cooling system - the same components trusted by commercial operators and professional mechanics worldwide for Toyota diesel engine reliability.