2.0L 8v - 1RZ

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2.0L 8v - 1RZ

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ACL trimetal connecting rod bearings Toyota 1RZ 2RZ 3RZ-FE 2TZ-FE

New product

Set of 8 trimetal connecting rod half-bearings for Toyota 1RZ, 2RZ, 3RZ-FE, 2TZ-FE.

  • Brand and treatment: ACL Race
  • Compatibility: Hiace, Hilux, Previa, Land Cruiser 90, Prado, 4Runner, Tacoma
  • Engine codes: 1RZ, 1RZ-E, 2RZ, 3RZ-FE, 2TZ-FE, 2TZ-FZE
  • Available sizes: standard to +0.25 mm, increased-clearance version (HX)

More details

67,42 € tax incl.

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70,97 € tax incl.

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  • The Toyota RZ and 2TZ four-cylinder engines

    The 1RZ and 1RZ-E (2.0 litre, 8 valves), 2RZ (2.4 litre, 8 valves), 3RZ-FE (2.7 litre, 16 valves), 2TZ-FE and 2TZ-FZE (2.4 litre, 16 valves) are Toyota four-cylinder engines, fitted to the Hiace, Hilux, Previa, Land Cruiser 90 and Prado, 4Runner, Tacoma and T100. ACL lists a single bearing set for these engines: same crankpin diameter, a single set covers the family.

    From the factory, this engine is fitted with standard production connecting rod bearings, sized for the loads of the original engine: as soon as power, engine speed or boost pressure increase, they reach their limits.

    Trimetal connecting rod bearings

    A trimetal bearing stacks three layers: a steel back, a copper-lead intermediate layer with high load capacity and an anti-friction running surface that protects the journal. The complete set contains 8 half shells, four pairs for a four-cylinder engine.

    The original bearing relies on an aluminium alloy over a steel back, intended for low to medium loads, whereas trimetal is designed for high, sustained loads: an aluminium bi-metal takes around 8,000 psi, a performance trimetal up to 12,000 psi, 50% more. Hence better resistance and better durability on turbocharged, supercharged and high-revving engines.

    Technical specifications

    Fitment dimensions common to all references
    ACL bearings
    Crankpin Ø 52.987 / 53.000 mm
    Housing bore Ø 56.000 / 56.024 mm
    Width 19.83 mm
    ReferenceBrand and treatmentSizeWall thickness (mm)
    4B8376H-STDACL Race - UntreatedStandard1.485
    4B8376HX-STDACL Race - UntreatedStd, increased clearance (HX)1.472
    4B8376H-.025ACL Race - Untreated+0.0251.498
    4B8376H-.25ACL Race - Untreated+0.251.610

    Running clearance

    The running clearance is the gap between the bearing and the journal where the oil film flows.

    In operation, the crankshaft journal does not rub against the bearing: it rides on this oil film, which carries the load. Clearance sets the thickness of this film: too tight, oil flows poorly, temperature rises and the risk of seizure increases; too loose, oil escapes, the film loses load-carrying capacity and oil pressure drops. The right clearance is the balance between adequate lubrication and a well-maintained oil film.

    Size / gradeWhen to choose itACL Race Series
    Standard (STD)Standard journal, not reground0.055 to 0.066 mm
    Increased clearance (HX)Wider clearance: high oil flow, high rpm0.081 to 0.092 mm
    +0.025 mmPolished journal0.055 to 0.066 mm
    +0.25 mmJournal reground to 0.25 mm0.055 to 0.066 mm

    Checking on assembly: lay a calibrated strip (Plastigauge) on the journal, torque the rod cap to spec, then compare the crushed strip against the gauge to read the clearance.

    Plastigauge

    Order the Plastigauge →

    Technical guide

    The ACL rod bearings shown here are trimetal bearings, designed for engine building and racing. Compared with an original bearing, they handle far higher loads: they cope with increased power, high rpm or the addition of a turbo or supercharger, where a standard bearing quickly reaches its limit.

    The brand

    ACL Bearing CompanyACL Bearing Company, an Australian manufacturer of high-performance engine bearings since 1949, offers with its Race Series precise trimetal bearings, available in many sizes and proven on built engines worldwide.

    Vehicle compatibility

    This connecting rod bearing set fits the 1RZ, 1RZ-E, 2RZ, 3RZ-FE, 2TZ-FE and 2TZ-FZE four-cylinder engines of the following Toyota models:

    BrandModel (chassis)Engine codePowerYears
    TOYOTA4 RUNNER III (_N18_) 2.7 / 2.7 EFI 4WD3RZ-FE152 hp1995–2002
    TOYOTACOASTER Bus (_B4_, _B5_) 2.73RZ-FE133–152 hp1993–2003
    TOYOTADYNA 200 Platform/Chassis 2.73RZ-FE125 hp1995–2001
    TOYOTAESTIMA EMINA / LUCIDA (_R1_, _R2_) 2.4 / 2.4 4x42TZ-FE, 2TZ-FZE135–160 hp1990–1999
    TOYOTAGRANVIA (_H2_, _H1_) 2.73RZ-FE145 hp1995–1998
    TOYOTAHIACE IV Bus (_H1_) 2.0 / 2.41RZ, 1RZ-E, 2RZ98–110 hp1989–2000
    TOYOTAHIACE IV Bus (__H1_, __H2_) 2.7 / 2.7 4WD3RZ-FE143–144 hp1998–2006
    TOYOTAHIACE IV Van (_H1_) 2.0 / 2.41RZ, 1RZ-E, 2RZ98–110 hp1989–2004
    TOYOTAHIACE IV Van (__H1_, __H2_) 2.7 / 2.7 4WD3RZ-FE143–144 hp1998–2005
    TOYOTAHILUX III SUV (_N1_, _N2_) 2.7 EFI3RZ-FE145 hp2001–2004
    TOYOTAHILUX VI Platform/Chassis (_N1_) 2.0 EFI / 2.7 EFI1RZ-E, 3RZ-FE110–145 hp1997–2005
    TOYOTAHILUX VI Pickup (_N1_) 2.0 EFI / 2.7 EFI / 2.7 EFI 4WD / 2.7 / 2.01RZ-E, 3RZ-FE, 1RZ92–150 hp1997–2005
    TOYOTALAND CRUISER 90 (_J9_) 2.73RZ-FE150 hp1995–2002
    TOYOTALAND CRUISER PRADO (_J12_) 2.73RZ-FE152 hp2002–2004
    TOYOTAPREVIA I (_R1_, _R2_) 2.4 / 2.4 4WD2TZ-FE, 2TZ-FZE132–160 hp1990–2000
    TOYOTAQUALIS (_F5_) 2.01RZ-E94 hp1999–2004
    TOYOTAT100 Pickup (_CK_) 2.7 4WD / 2.73RZ-FE152 hp1993–1998
    TOYOTATACOMA Pickup (_N1_) 2.7 / 2.7 4WD3RZ-FE152 hp1995–2004
    TOYOTATARAGO Bus 2.73RZ-FE144 hp1998–2004
    TOYOTATARAGO Van 2.73RZ-FE144 hp1998–2004
    TOYOTATUV MPV (_F7_, _F8_) 2000 i1RZ-E97 hp2003–2005