6-cylinder petrol engine Toyota Highlander 1 (XU20)

V6 Engine Specifications
General information Engine designation - 1MZ FE and 3MZ FE Engine capacity 1MZ-FE — 3.0 l 3MZ-FE — 3.3 l Cylinder numbering (in the direction from the timing belt to the gearbox) Right (closer to the partition) side -...

General information about the V6 engine
The models described in this Manual are equipped with a V-shaped 6-cylinder (V6) 1MZ-FE engine with a working volume of 3.0 liters or a 3MZ-FE engine, which is essentially similar to the 1MZ-FE engine, but has a larger...

Repair operations performed without removing the engine from the vehicle
Many major repairs can be performed without removing the engine from the vehicle. Before starting work, clean the engine compartment and the outside of the engine with a suitable degreaser. This will make the job easier...

Top Dead Center (TDC) for Piston #1 — Definition
1. Top dead center (TDC) is the highest point in the cylinder that each piston reaches as it reciprocates in the cylinder when the crankshaft is spliced. Each piston reaches TDC twice per cycle: once on the compression...

Cylinder Head Covers — Removal and Installation
Removal 1. Disconnect the ground cable from the battery ( see paragraph 1 of chapter 5 ). 2. Remove the engine cover (fig. 4.2, a, b). Row 4.2, a. To remove the engine cover, remove the oil filler cap, then unscrew the...

Intake manifold — removal and installation
Caution: Wait until the engine has cooled down completely before starting this procedure. Removal 1. Relieve the pressure in the fuel system ( see chapter 4 ), then disconnect the ground cable from the battery ( see...

Exhaust manifolds with catalytic converters — removal and installation
Caution: Wait until the engine has cooled down completely before starting this procedure. Note: 2004 and later vehicles are equipped with exhaust manifold assemblies with catalytic converters, while 2003 and earlier...

Timing Belt and Pulleys — Removal
1. Disconnect the ground cable from the battery ( see paragraph 1 of chapter 5 ). 2. On 2004 and later Highlander and all Lexus models, remove the upper hood panel/air intake box deflector ( see chapter 11 ). 3. On 2004...

Timing Belt and Pulleys — Inspection
27. Check the timing belt for oil or dirt on its surface and inspect for visible defects such as cracks or missing teeth. If the belt is cracked or worn, also check the pulleys for nicks and other irregularities....

Timing Belt and Pulleys — Installation
32. Thoroughly remove dirt, oil and grease from the timing belt area on the front of the engine. 33. Install the timing pulley on the camshaft (if it was removed), with the flange side facing out. Align the pin hole in...

Variable Valve Timing (VVT) — Description
Application: The following procedures apply to the oil control valve, oil filter, or intake camshaft timing pulley/actuator on any of the cylinder heads. 1. The WT system changes the angular position of the intake...

Variable Valve Timing (VVT) System — Replacement of Elements
Note. Problems in the electrical circuit of the VVT control oil valve cause a diagnostic fault code to be generated and a warning lamp to be switched on on the instrument panel "Check engine" (check the engine). For...

Cuffs — replacement
Crankshaft seal 1. Remove the timing belt and crankshaft toothed pulley ( see paragraph 7 ). 2. Mark how deep the cuff is inserted into the mounting hole, and then cut off the edge of the cuff with a sharp knife. 3....

Camshafts and tappets — removal and inspection
Application: Before starting this procedure, prepare two M6 x 1.0 mm bolts of 16 to 20 mm length. They are referred to in the text as process bolts. Removal 1. Set the engine to TDC position (see paragraph 3), then...

Camshafts and tappets — installation
16. Assemble the exhaust camshaft gear by installing the camshaft gear spring, auxiliary gear, warp washer and snap ring. 17. Clamp the camshaft in a vice with soft jaws. 18. Insert the service bolt into the unthreaded...

Cylinder heads — removal and installation
Caution: Wait until the engine has cooled down completely before starting this procedure. Removal 1. Disconnect the ground cable from the battery ( see paragraph 1 of chapter 5 ). 2. Drain the coolant from the cooling...

Oil pan — removal and installation
Removal 1. Remove the hood ( see chapter 11 ). 2. Disconnect the ground cable from the battery ( see paragraph 1 of chapter 5 ). 3. Raise the vehicle and place secure supports underneath it. Caution: If the vehicle is...

Oil pump — removal, inspection and installation
Removal 1. Remove the oil pan ( see paragraph 12 ). 2. Remove the timing belt ( see paragraph 7 ). 3. Remove the crankshaft toothed pulley ( see paragraph 7 ) and the crankshaft position sensor (see chapter). Place a...

Faceplate — removal and installation
For a description of this procedure, please refer to chapter 2A , but use the tightening torque values specified in Specifications at the beginning of this chapter. On V6 engines, two spacers are used to secure the...

Rear Main Seal — Replacement
For a description of this procedure, please refer to chapter 2A , but keep in mind that the V6 engine does not have a gasket between the oil seal housing and the cylinder block. Instead, apply a 2-3 mm wide bead of...

Powertrain Mounts — Checking and Replacing
Contact chapter 2A , but keep in mind that the V6 engine mounts are slightly different in design. But this does not significantly affect the inspection and replacement procedures (fig. 16.1, c-e). Fig. 16.1, a. First...

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