ENGINE UNIT GENERAL


  1. OUTLINE


    1. The 1AZ-FE engine is an in-line 4-cylinder, 2.0 liter, 16 valve DOHC engine. This engine uses the Variable Valve Timing-intelligent (VVT-i) system, Direct Ignition System (DIS) and Electronic Throttle Control System-intelligent (ETCS-i). These control functions achieve improved engine performance, fuel economy, and clean emissions.

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  2. SPECIFICATION

    Engine Type 1AZ-FE
    No. of Cyls. & Arrangement 4-cylinder, In-line
    Valve Mechanism

    16-valve DOHC, Chain Drive

    (With VVT-i)
    Combustion Chamber Pentroof Type
    Flow of Intake and Exhaust Gasses Cross-flow
    Fuel System SFI
    Ignition System DIS
    Displacement

    cm3(cu. in.)

    		 1998 (121.9)
    Bore X Stroke mm (in.) 86.0 X 86.0 (3.39 X 3.39)
    Compression Ratio 9.8 : 1
    Max. Output (EEC) kW@rpm 109@6000
    Max. Torque (EEC) N*m@rpm 190@4000
    Oil Capacity Dry liters (US qts, Imp. qts) 5.0 (5.3, 4.4)
    With Oil Filter liters (US qts, Imp. qts) 4.3 (4.5, 3.8)
    Without Oil Filter liters (US qts, Imp. qts) 4.1 (4.3, 3.6)
    Oil Grade API grade SL "Energy-Conserving", SM "Energy-Conserving", SN "Resource-Conserving" or ILSAC multigrade engine oil
    Engine Coolant Type

    TOYOTA Genuine Super Long Life

    Coolant or the following*1
    Capacity liters (US qts, Imp. qts) 6.6 (7.0, 5.8)
    Spark Plug Type DENSO Made SK16R11 (Iridium)
    NGK Made IFR5A11 (Iridium)
    Plug Gap mm (in.) 1.0 to 1.1 (0.0394 to 0.0433)
    Firing Order 1 - 3 - 4 - 2
    Fuel Octane Number 91 or higher
    Emission Regulation EURO IV
    Engine Service Mass*2 (Reference) kg (lb) 130 (287)

    • *1: Similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, and non-borate coolant with long-life hybrid organic acid technology. (Coolant with long-life hybrid organic acid technology consists of a combination of low phosphates and organic acids.)

    • *2: The figure shown is the weight of the part without coolant and oil.

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  3. MAIN FEATURES


    1. The 1AZ-FE engine has achieved the following performance through the use of the items listed in the table below.


      1. High performance and reliability

      2. Low noise and vibration

      3. Lightweight and compact design

      4. Good serviceability

      5. Clean emissions and fuel economy

        Item (1) (2) (3) (4) (5)
        Engine Proper A cylinder head cover sub-assembly made of aluminum alloy is used. ○
        A taper squish shape is used for combustion chambers. ○ ○
        Spiny-type liners are used in the cylinder bores. ○
        A water jacket spacer is used. ○ ○
        The piston skirt is coated with resin. ○ ○ ○
        A resin gear balance shaft is used. ○ ○
        Valve Mechanism The Variable Valve Timing-intelligent (VVT-i) system is used. ○ ○
        A chain sub-assembly and No. 1 chain tensioner assembly are used. ○ ○
        Cooling System TOYOTA Genuine Super Long Life Coolant (SLLC) is used. ○
        Intake and Exhaust System An intake manifold made of plastic is used. ○
        A linkless type throttle body with motor assembly is used. ○ ○
        A stainless steel exhaust manifold sub-assembly is used. ○ ○
        An ultra thin-wall, high-cell density ceramic type Three-Way Catalytic converter (TWC) is used. ○
        Fuel System A fuel returnless system is used. ○ ○ ○
        Quick connectors are used to connect the fuel hoses with the fuel pipes. ○
        Compact 12-hole type fuel injector assemblies are used. ○ ○
        Ignition System The Direct Ignition System (DIS) is used. ○ ○ ○ ○
        Iridium-tipped spark plugs are used. ○ ○ ○
        Charging System A segment conductor type generator assembly is used. ○ ○
        Starting System A planetary reduction type starter assembly is used. ○
        Serpentine Belt Drive System A serpentine belt drive system is used. ○ ○
        Engine Control System A Magnet Pick Up (MPU) type camshaft position sensor is used. ○ ○
        The Electronic Throttle Control System-intelligent (ETCS-i) is used. ○ ○
        An evaporative emission control system is used. ○