What are the ways to check the operation of the water pump while it is still installed on the engine on Toyota MR2?

A faulty water pump can cause engine overheating and damage due to poor coolant circulation. Two checks can determine if the pump is defective. The pump body has a "weep hole" underneath. If the pump seal fails, coolant drips from this hole, visible from under the engine. Raise the vehicle and use a flashlight to check for leakage. If the pump shaft bearing fails, it emits a squealing sound. Don't confuse this with drivebelt slippage. Check for shaft wear by moving the pulley up and down. If there's excessive side play, the shaft or bearing is worn and the pump needs replacing.

How do you replace a water pump in a Toyota MR2?

Drain coolant.Remove A/C compressor drivebelt if applicable.Loosen water pump pulley bolts.Loosen alternator bolt and nut, remove drivebelt.Remove water pump pulley.Detach water inlet pipe flange from water pump.Pull inlet pipe away from pump.Remove dipstick tube, plug hole.Remove timing belt covers.Remove water pump bolts and pump. 1Discard old O-ring.Install new O-ring on block.Reverse steps for installation.

Genuine Toyota MR2 Water Pump

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6 Water Pumps found

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Toyota MR2 Engine Water Pump Assembly
Part Number: 16100-19115
$85.15 MSRP: $120.26
You Save: $35.11 (30%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Pump Assy, Engine Water
- Replaced by: 16100-19115-83
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1985-1989 Toyota MR2 | GT, Super Charger | 4 Cyl 1.6L | 4AGELC, 4AGZE; 4AGELC, 4AGZE; AW11L-WCMQFA, AW11L-WCMQFK, AW11L-WCPQFA, AW11L-WCPQFK, AW11L-WJMQFA, AW11L-WJMQFK, AW11L-WJMQRA, AW11L-WJMQRK, AW11L-WJPQFA, AW11L-WJPQRA
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Toyota MR2 Water Pump Assembly W/O Cover
Part Number: 16110-79115
$100.88 MSRP: $142.85
You Save: $41.97 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump Assy, Water, W/O Cover
- Replaces: 16110-79055, 16110-79105
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1990-1995 Toyota MR2 | 4 Cyl 2.0L | 3SGTE; 3SGTE; SW20L-ACMZZA, SW20L-AJMZZA, SW20L-AJMZZK
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Toyota MR2 Engine Water Pump Assembly
Part Number: 16100-79126
$138.52 MSRP: $197.82
You Save: $59.30 (30%)
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Product Specifications
- Other Name: Pump Assy, Engine Water
- Replaced by: 16100-79127
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1990-1995 Toyota MR2 | 4 Cyl 2.0L | 3SGTE; 3SGTE; SW20L-ACMZZA, SW20L-AJMZZA, SW20L-AJMZZK
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Toyota MR2 Water Pump Assembly W/O Cover
Part Number: 16110-79025
$43.88 MSRP: $61.34
You Save: $17.46 (29%)
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Product Specifications
- Other Name: Pump Assy, Water, W/O Cover
- Manufacturer Note: (J)
- Replaces: 16110-79045
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1990-1995 Toyota MR2 | 4 Cyl 2.2L | 5SFE; 5SFE; SW21L-ACMZKA, SW21L-ACPZKA, SW21L-AJMZKA, SW21L-AJMZKK, SW21L-AJPZKA
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Toyota MR2 Engine Water Pump Assembly
Part Number: 16100-79135
$78.66 MSRP: $111.10
You Save: $32.44 (30%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Pump Assy, Engine Water
- Replaced by: 16100-79135-83
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1990-1995 Toyota MR2 | 4 Cyl 2.2L | 5SFE; 5SFE; SW21L-ACMZKA, SW21L-ACPZKA, SW21L-AJMZKA, SW21L-AJMZKK, SW21L-AJPZKA
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Toyota MR2 Water Pump Assembly, W/O Coupling
Part Number: 16110-16020
Product Specifications
- Other Name: Pump Assembly, Water, W/O Coupling
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1985-1989 Toyota MR2 | GT, Super Charger | 4 Cyl 1.6L | 4AGELC, 4AGZE; 4AGELC, 4AGZE; AW11L-WCMQFA, AW11L-WCMQFK, AW11L-WCPQFA, AW11L-WCPQFK, AW11L-WJMQFA, AW11L-WJMQFK, AW11L-WJMQRA, AW11L-WJMQRK, AW11L-WJPQFA, AW11L-WJPQRA

Toyota MR2 Water Pump

The Water Pump is one of the significant pieces of the mechanistic structure of Toyota MR2, and its work is connected with circulation of coolant from the radiator to the engine, and absorption of heat produced during the combustion procedure. In the majority of MR2 cars, the sleeve type water pump connected through a belt and an impeller helps to circulate water through the engine block then to the radiator. Although in older models of MR2 vehicles, one may even find water pump made of cast iron, today's MR2 vehicles come with aluminum casting. Signs of a faulty water pump include, coolant stains on the ground, loud screeching noise due to the worn out bearings or a hot engine. Some of these parts include high-performance water pumps, impellers and internal passages are used to increase the circulation of the coolant and thuse improving the cooling of the engine. Other alternatives to mechanically driven water pumps Found in improperly modified MR2, parasitic power loss, and inaccurate coolant circulation/pressure can be eliminated with manual electric water pumps and high-tuned/ modified MR2.

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Toyota MR2 Water Pump Parts Questions & Experts Answers

Water Pump Assembly, W/O Coupling
16110-16020
Q: What are the ways to check the operation of the water pump while it is still installed on the engine on Toyota MR2?
A: A faulty water pump can cause engine overheating and damage due to poor coolant circulation. Two checks can determine if the pump is defective. The pump body has a "weep hole" underneath. If the pump seal fails, coolant drips from this hole, visible from under the engine. Raise the vehicle and use a flashlight to check for leakage. If the pump shaft bearing fails, it emits a squealing sound. Don't confuse this with drivebelt slippage. Check for shaft wear by moving the pulley up and down. If there's excessive side play, the shaft or bearing is worn and the pump needs replacing.
Engine Water Pump Assembly
16100-19115
Q: How do you replace a water pump in a Toyota MR2?
A: Drain coolant.Remove A/C compressor drivebelt if applicable.Loosen water pump pulley bolts.Loosen alternator bolt and nut, remove drivebelt.Remove water pump pulley.Detach water inlet pipe flange from water pump.Pull inlet pipe away from pump.Remove dipstick tube, plug hole.Remove timing belt covers.Remove water pump bolts and pump. 1Discard old O-ring.Install new O-ring on block.Reverse steps for installation.