4.0L 24v - 1GR-FE

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4.0L 24v - 1GR-FE

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ACL trimetal connecting rod bearings Toyota 1GR-FE 4.0 V6

New product

Set of 12 trimetal connecting rod half-bearings for Toyota 1GR-FE.

  • Brand and treatment: ACL Race
  • Compatibility: Hilux, Land Cruiser Prado, 4Runner, Tundra
  • Engine codes: 1GR-FE
  • Available sizes: standard to +0.25 mm, increased-clearance version (HX)

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  • The Toyota 1GR-FE V6

    The 1GR-FE is Toyota's 4.0 litre 24-valve V6, fitted to the 4Runner, FJ Cruiser, Fortuner, Hilux, Land Cruiser, Land Cruiser Prado, Tacoma and Tundra. ACL lists a single bearing set for this engine: 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 12 half shells, six pairs for a six-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 55.992 / 56.000 mm
    Housing bore Ø 59.000 / 59.024 mm
    Width 16 mm
    ReferenceBrand and treatmentSizeWall thickness (mm)
    6B8262H-STDACL Race - UntreatedStandard1.492
    6B8262HX-STDACL Race - UntreatedStd, increased clearance (HX)1.479
    6B8262H-.025ACL Race - Untreated+0.0251.505
    6B8262H-.25ACL Race - Untreated+0.251.617

    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 reground0.058 to 0.069 mm
    Increased clearance (HX)Wider clearance: high oil flow, high rpm0.083 to 0.094 mm
    +0.025 mmPolished journal0.058 to 0.069 mm
    +0.25 mmJournal reground to 0.25 mm0.058 to 0.069 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 1GR-FE V6 of the following Toyota models:

    BrandModel (chassis)Engine codePowerYears
    TOYOTA4 RUNNER IV (_N21_) 4.0 / 4.0 EFI 4WD1GR-FE237–249 hp2002–2009
    TOYOTA4 RUNNER V (_N28_) 4.0 / 4.0 4WD1GR-FE249–275 hp2009–
    TOYOTAFJ CRUISER (GSJ1_) 4.0 / 4.0 4WD1GR-FE239–276 hp2005–
    TOYOTAFORTUNER (_N15_, _N16_) 4.0 / 4.0 4x41GR-FE235–238 hp2015–
    TOYOTAFORTUNER (_N5_, _N6_) 4.0 / 4.0 4WD1GR-FE238 hp2005–2015
    TOYOTAHILUX VII Platform/Chassis (_N1_, _N2_) 4.0 V6 VVTi / 4.0 V6 VVTi 4WD1GR-FE238 hp2005–
    TOYOTAHILUX VII Pick-up (_N1_, _N2_, _N3_) 4.0 V6 VVTi / 4.0 V6 VVTi 4WD1GR-FE238 hp2005–2016
    TOYOTAHILUX VIII Pick-up (_N1_) 4.0 V6 VVTi / 4.0 V6 VVTi 4WD1GR-FE238 hp2015–
    TOYOTALAND CRUISER (_J7_, _JL7_) 4.0 4x41GR-FE231 hp2007–
    TOYOTALAND CRUISER 200 (_J2_) 4.01GR-FE239–271 hp2010–
    TOYOTALAND CRUISER PRADO (_J12_) 4.0 / 4.0 V6 VVT-i1GR-FE235–282 hp2002–2010
    TOYOTALAND CRUISER PRADO (_J15_) 4.0 V6 VVT / 4.0 V6 VVTi / 4.0 V6 VVT-i / 4.0 V6 Dual VVTi1GR-FE249–282 hp2009–
    TOYOTALAND CRUISER Pick-up (_J7_, _JL7_) 4.0 4x41GR-FE231 hp2007–
    TOYOTATACOMA Pick-up (_N2_) 4.0 / 4.0 4WD1GR-FE237–238 hp2004–2015
    TOYOTATUNDRA Pick-up (_K3_, _K4_) 4.0 / 4.0 4WD1GR-FE239–245 hp2003–2006
    TOYOTATUNDRA Pick-up (_K5_, _K6_) 4.01GR-FE239–273 hp2006–