2006 TOYOTA RAV4 2gr

ENGINE - 2GR-FE ENGINEEG-71
FEATURES OF 2GR-FE ENGINE
The 2GR-FE engine has achieved the following performance through the use of the items listed below.
(1) High performance and reliability
(2) Low noise and vibration
(3) Lightweight and compact design
(4) Good serviceability
(5) Clean emission and fuel economy
Item
(1)(2)(3)(4)(5)
A steel laminate type cylinder head gasket is used.
An upright intake port is used.
EngineA taper squish shape is used for combustion chamber.Engine
ProperA cylinder block made of aluminum alloy is used.Proper
The skirt portion of the piston is applied with resin to
reduce friction.
An oil pan No. 1 made of aluminum alloy is used.
The Dual VVT-i (Variable Valve Timing-intelligent)
system is used.
Va l v e
Mh i
Hydraulic lash adjusters are used.
MechanismTiming chains and chain tensioners are used.
Roller rocker arms are used.
Lubrication
SystemAn oil filter with a replaceable element is used.
Cooling SystemThe TOYOTA Genuine SLLC (Super Long Life Coolant)Cooling SystemThe TOYOTA Genuine SLLC (Super Long Life Coolant)
is used for the engine coolant.
The linkless-type throttle body is used.
Intake andThe intake air chamber made of plastic is used.Intake and
Exhaust
S
A stainless steel exhaust manifold is used.
SystemAn ultra thin-wall, high-cell density ceramic type TWC
(Three-Way Catalytic converter) is used.
The fuel delivery pipe made of plastic is used.
Fuel SystemA compact 12-hole type injector is used.Fuel SystemQuick connectors are used to connect the fuel hose with
the fuel pipe.
Ignition System
The DIS (Direct Ignition System) makes ignition timing
adjustment unnecessary.
Ignition System
The long-reach type spark plugs are used.
(Continued)

ENGINE - 2GR-FE ENGINE EG-72
Item
(1)(2)(3)(4)(5)
ChargingA segment conductor type generator is used.Charging
SystemA generator pulley with a clutch is used.
Starting
SystemThe PS (Planetary reduction-Segment conductor motor)
type starter is used.
Serpentine Belt
Drive SystemA serpentine belt drive system is used.
The MRE (Magnetic Resistance Element) type VVT sensorsThe MRE (Magnetic Resistance Element) type VVT sensors
are used.
The ETCS-i (Electronic Throttle Control System-intelligent)
Engine
The ETCS i (Electronic Throttle Control System intelligent)
is used.
Control
SystemThe ACIS (Acoustic Control Induction System) is used.SystemThe air intake control system is used.
The charging control is used.
Evaporative emission control system is used.

ENGINE - 2GR-FE ENGINE
285EG05
Oil Delivery PipeCylinder Head Covers
Cylinder Head
Cover Gaskets
Oil Delivery Pipe
285EG06
Engine
FrontShim A A
For Right Bank
For Left BankA - A Cross SectionEG-73
ENGINE PROPER
1. Cylinder Head Cover
Lightweight yet high-strength aluminum cylinder head covers are used.
An oil delivery pipe is installed inside the cylinder head cover. This ensures lubrication to the sliding parts
of the roller rocker arm, improving reliability.
2. Cylinder Head Gasket
A steel-laminate type cylinder head gasket is used. A shim is used around the cylinder bore of the gasket to
help enhance sealing performance and durability.

ENGINE - 2GR-FE ENGINE
285EG08 285EG07
Intake
Va l v e
Spark
Plug
Hole
Exhaust
Va l v eIntake Side
Exhaust SideCamshaft Housing
Exhaust
SideIntake
Side
Upright
Intake Port
Taper Squish A
A
View from Back Side A - A Cross Section
215EG19 215EG18
Siamese Type Independent Type EG-74
3. Cylinder Head
The cylinder head structure has been simplified by separating the cam journal portion (camshaft housing)
from the cylinder head.
The cylinder head, which is made of aluminum, contains a pentroof-type combustion chamber. The spark
plug is located in the center of the combustion chamber in order to improve the engine’s anti-knocking
performance.
The intake ports are on the inside and the exhaust ports are on the outside of the left and right banks
respectively.
Upright intake ports are used to improve the intake efficiency.
A taper squish combustion chamber is used to improve anti-knocking performance and intake efficiency.
In addition, engine performance and fuel economy have been improved.
The siamese type intake port is used to reduce the overall surface area of the intake port walls. This
prevents the fuel from adhering onto the intake port walls, thus reducing HC exhaust emissions.
— REFERENCE —

ENGINE - 2GR-FE ENGINE
285EG10 285EG09
60
Knock Sensor Bosses
36.6 mm
(1.441 in.)
105.5 mm
(4.15 in.)
View from Top Side
285EG11
Wa t e r P a s s a g eEG-75
4. Cylinder Block
The cylinder block is made of aluminum alloy, so it is lightweight.
The cylinder block has a bank angle of 60, a bank offset of 36.6 mm (1.441 in.) and a bore pitch of 105.5
mm (4.15 in.), resulting in a compact block in its length and width even for its displacement.
Installation bosses of the two knock sensors are located on the inside of left and right banks.
A water passage has been provided between the cylinder bores. By allowing the engine coolant to flow
between the cylinder bores, this construction enables the temperature of the cylinder walls to be kept
uniform.

ENGINE - 2GR-FE ENGINE
285EG12
Liner
Cylinder
Block
Irregularly shaped
outer casting
surface of liner A
A
A - A Cross Section
285EG13
Front MarkResin CoatingTaper Squish Shape
Alumite
Coating EG-76
A compact block has been achieved by producing the thin cast-iron liners and cylinder block as a unit. It
is not possible to bore the block with this liner.
The liners are the spiny-type, which have been manufactured so that their casting exteriors form large
irregular surfaces in order to enhance the adhesion between the liners and the aluminum cylinder block.
The enhanced adhesion helps improve heat dissipation, resulting in a lower overall temperature and heat
deformation of the cylinder bores.
5. Piston
The piston is made of aluminum alloy.
The piston head portion uses a taper squish shape to accomplish fuel combustion efficiency.
The piston skirt is coated with resin to reduce the friction loss.
The groove of the top ring is coated with alumite to ensure wear resistance.
By increasing the machining precision of the cylinder bore diameter, the outer diameter of the piston is
made into one size.

ENGINE - 2GR-FE ENGINE
285EG14
Knock Pin
Plastic Region
Tightening Bolts
285EG15
Balance Weight
Engine
Front
No. 1 Journal
No. 2 Journal
No. 3 JournalNo. 4 JournalEG-77
6. Connecting Rod and Connecting Rod Bearing
Connecting rods that have been forged for high strength are used for weight reduction.
Knock pins are used at the mating surfaces of the bearing caps of the connecting rod to minimize the
shifting of the bearing caps during assembly.
The connecting rods and caps are made of high-strength steel for weight reduction.
Nutless-type plastic region tightening bolts are used on the connecting rods for a lighter design.
An aluminum bearing is used for the connecting rod bearings.
The connecting rod bearings are reduced in width to reduce friction.
7. Crankshaft
A crankshaft made of forged steel, which excels in rigidity and wear resistance, is used.
The crankshaft has 4 journals and 5 balance weights.
All pin and journal fillets are IH-finished to maintain adequate strength.

ENGINE - 2GR-FE ENGINE
285EG81
Plastic Region
Tightening Bolts
Crankshaft
Bearing CapSeal WasherUpper Main Bearing
Oil Grooved
Micro-grooved
Lower Main Bearing
285EG80
Torsional Damper
Rubber EG-78
8. Crankshaft Bearing and Crankshaft Bearing Cap
The crankshaft bearing is made of aluminum alloy.
As the connecting rod bearings, the lining surface of the crankshaft bearings is micro-grooved to realize
an optimal amount of oil clearance. As a result, cold-engine cranking performance is improved and engine
vibration is reduced.
The upper main bearing has an oil groove around its inside circumference.
The crankshaft bearing caps are tightened using 4 plastic region tightening bolts for each journal. In
addition, each cap is tightened laterally to improve its reliability.
9. Crankshaft Pulley
The rigidity of the crankshaft pulley with its
built-in torsional damper rubber reduces noise.