Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT FOR COOLANT LEAK

HINT:

  • The sliding surface inside the engine water pump assembly is lubricated by engine coolant. As some engine coolant is discharged during normal operation, engine coolant residue (solids) may be found on the drain plug or the bottom of the engine water pump assembly. Also, engine coolant may leak if foreign matter enters the engine water pump assembly, however the sealing performance will recover when the foreign matter is pushed out or breaks into fine pieces. In this case, check the area around the engine water pump assembly.
  • Before performing this inspection, check that there are no engine coolant leaks from any parts other than the engine water pump assembly. If there are leaks, inspect those areas first.
  • Perform this inspection when the engine is cold.

(a) Visually check the engine water pump assembly.

(1) Check that engine coolant is not dripping from the engine water pump assembly.

HINT:

  • If engine coolant is dripping, replace the engine water pump assembly.
  • If engine coolant is not dripping, perform the following check.

(b) Inspect the area around the engine water pump assembly.

HINT:

Check for deposits around the drain plug of the engine water pump assembly.

(1) Remove the fan pulley (See page ).

(2) Press a piece of thin paper towel against the drain plug or deposits on the lip of the drain plug and check that the paper towel is not wet.

Text in Illustration

*a

Water Hole

*b

Air Hole

HINT:

  • If the thin paper towel is wet, replace the engine water pump assembly.
  • If the thin paper towel is dry, clean the area around the engine water pump assembly.

2. INSPECT ENGINE WATER PUMP ASSEMBLY

(a) Turn the pulley and check that the water pump bearing moves smoothly and quietly.

If necessary, replace the engine water pump assembly.

(b) Install the fan pulley (See page 3. INSPECT FLUID COUPLING ASSEMBLY ).

3. INSPECT FLUID COUPLING ASSEMBLY

(a) Remove the fan with fluid coupling assembly (See page ).

(b) Remove the 4 nuts and fan from the fluid coupling assembly.

(c) Check that the fluid coupling assembly is not damaged and that no silicon oil leaks.

If necessary, replace the fluid coupling assembly.

(d) Install the fan to the fluid coupling assembly with the 4 nuts.

Torque:

10 N·m {102 kgf·cm, 7 ft·lbf}

(e) Install the fan with fluid coupling assembly (See page Removal ).

Components
COMPONENTS ILLUSTRATION ILLUSTRATION ...

Removal
REMOVAL PROCEDURE 1. REMOVE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY (See page ) 2. REMOVE NO. 1 RADIATOR HOSE 3. REMOVE NO. 2 RADIATOR HOSE 4. DISCONNECT RADIATOR RESERVE TANK HOSE 5 ...

Other materials:

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each sy ...

System Description
SYSTEM DESCRIPTION 1. GENERAL (a) This system uses ultrasonic sensors to detect any obstacles at the corners and the rear of the vehicle. The system then informs the driver of the distance between the sensors and an obstacle as well as their positions by indicating them on the multi-informat ...

Installation
INSTALLATION PROCEDURE 1. INSTALL HAZARD WARNING SIGNAL SWITCH ASSEMBLY (AIR CONDITIONING CONTROL ASSEMBLY) (for Automatic Air Conditioning System) (a) Connect the connectors. (b) Engage the 8 clips to hazard warning signal switch assembly (air conditioning control assembly). 2. INSTALL HAZ ...

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