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ACL and King trimetal connecting rod bearings Honda D15 D16 ZC B20B

New product

Set of 8 trimetal connecting rod half-bearings for Honda D15, D16, ZC, B20B.

  • Brands and treatments: ACL Race, King XP, King XPC (pMaxKote)
  • Compatibility: Civic, CRX, Concerto, Accord, Integra, City, HR-V, CR-V
  • Engine codes: D15, D16, ZC, B20B
  • Available sizes: standard to +0.25 mm, increased-clearance version (HX / STDX)

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  • The Honda D15, D16, ZC and B20B four-cylinder engines

    The D15 (1.5 litre), D16 (1.6 litre), ZC and B20B (2.0 litre) are inline four-cylinder engines of Honda, fitted notably to the Civic, CRX, Concerto, Accord, City, HR-V, CR-V and Integra, including the Acura Integra and Acura EL. ACL and King list the same bearing set for these engines: 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 / King bearings
    Crankpin Ø 44.980 / 45.000 mm
    Housing bore Ø 48.000 / 48.020 mm
    Width 18.5 mm
    ReferenceBrand and treatmentSizeWall thickness (mm)
    4B1956H-STDACL Race - UntreatedStandard1.499
    4B1956HX-STDACL Race - UntreatedStd, increased clearance (HX)1.486
    4B1956H-.025ACL Race - Untreated+0.0251.512
    4B1956H-.25ACL Race - Untreated+0.251.624
    CR4046XP STDXKing Racing - UntreatedStd, increased clearance (STDX)1.486
    CR4046XP.026King Racing - Untreated+0.0261.512
    CR4046XP0.25King Racing - Untreated+0.251.626
    CR4046XPCKing Racing - pMaxKoteStandard1.499
    CR4046XPC STDXKing Racing - pMaxKoteStd, increased clearance (STDX)1.486
    CR4046XPC.026King Racing - pMaxKote+0.0261.512
    CR4046XPC0.25King Racing - pMaxKote+0.251.626

    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 SeriesKing XP / XPC
    Standard (STD)Standard journal, not reground0.049 to 0.058 mm0.048 mm - 0.057 mm
    Increased clearance (HX / STDX)Wider clearance: high oil flow, high rpm0.074 to 0.083 mm0.073 mm - 0.082 mm
    +0.025 / +0.026 mmPolished journal0.049 to 0.058 mm0.048 mm - 0.057 mm
    +0.25 mmJournal reground to 0.25 mm0.049 to 0.058 mm0.048 mm - 0.057 mm

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

    Plastigauge

    Order the Plastigauge →

    Technical guide

    The ACL and King 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 two brands

    ACLACL 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.
    King RacingKing Engine Bearings, an Israeli manufacturer of high-performance engine bearings since the 1960s, offers with its pMax Black trimetal alloy bearings designed for heavy loads, with a pMaxKote coating available as an option (XPC version).

    Construction and advantages

    CriterionACL Race SeriesKing Racing
    Cross-sectionCross-section of an ACL Race Series trimetal bearingCross-section of a King Racing trimetal bearing
    TypeHigh-performance trimetal bearingHigh-performance trimetal bearing
    Country of manufactureAustraliaIsrael
    ConstructionTrimetal: steel back, copper layer, soft surfaceTrimetal: steel back, copper layer, soft surface
    AlloyRace Series (copper-lead)pMax Black (hardened copper-lead)
    Protective coatingNopMaxKote (optional, XPC version): polymer coating on the surface that limits wear when lubrication drops (start-ups, thin oil film).
    Available sizesStandard to +0.25 mm (+ increased clearance HX)Standard to +0.25 mm (+ increased clearance STDX)

    Vehicle compatibility

    This connecting rod bearing set fits the D15, D16, ZC and B20B four-cylinder engines of the following Honda and Acura models:

    BrandModel (chassis)Engine codePowerYears
    HONDACIVIC IV Saloon (ED, EF) 1.6 i 16V (ED4) / 1.5 i 16V (ED3, SH4) / 1.6 i 16V 4x4 (EE5) / 1.5 / 1.6 16V 4x4 / 160i SOHC (SH4)D15B1, D15B2, D16A1, D16A6, D16A7, D16Z282–130 hp1987–1992
    HONDACIVIC IV Hatchback (EC, ED, EE, EF) 1.6 i 16V (ED7) / 1.5 i 16V (ED6) / 1.5 / 1.6 i 16VD15B1, D15B2, D16A6, D16A7, D16A9, D16Z271–130 hp1987–1993
    HONDACRX I (AF, AS) 1.6 i 16V (AS)ZC1125 hp1986–1987
    HONDACRX II (ED, EE) 1.6 i 16V (ED9) / 1.6 i 16V / 1.5 / 1.6 SiD15B2, D15B6, D16A6, D16A8, D16A9, D16Z563–131 hp1987–1992
    HONDACRX III (EH, EG) 1.6 ESi (EH6) / 1.6 Si (EH6) / 1.6 i (EG1)D16Y7, D16Y8, D16Z6107–129 hp1992–1998
    HONDACIVIC IV Shuttle (EE, EF) 1.6 i 16V 4WD (EE4) / 1.5 i 16V (EE2) / 1.6 4x4 (EE4)D15B2, D16A6, D16A7, D16Z294–116 hp1988–1995
    HONDACIVIC V Hatchback (EG, EH) 1.5 i 16V (EG4) / 1.6 16V Vtec (EG5, EH3) / 1.6 (EG2) / 1.5 (EG4, EH2)D15B2, D15B4, D15B7, D15Z1, D16A9, D16Y1, D16Z690–131 hp1991–1995
    HONDACIVIC V Saloon (EG, EH) 1.5 i 16V (EG8) / 1.6 16V Vtec (EH9, EH5) / 1.6 EX (EH9) / 1.6 (EH9) / 1.5 / 160i SOHC (SR4)D15B2, D15B7, D15Z1, D16A7, D16Y1, D16Z683–131 hp1991–1996
    HONDACONCERTO (HW, MA) 1.5 i 16V (MA1) / 1.6 i 16V / 1.6 i 16V (HW) / 1.6 16VD15B2, D16A8, D16Z290–122 hp1989–1995
    HONDACIVIC VI Fastback (MA, MB) 1.5 i Vtec-E (MA9) / 1.5 16V (MB3) / 1.6 16V (MB4)D15Z3, D15Z8, D16B290–116 hp1994–2001
    HONDACIVIC V Coupe (EJ) 1.5 i LSi (EJ2) / 1.5D15B794–101 hp1993–1995
    HONDACIVIC VI Hatchback (EJ, EK) 1.6 i (EK1) / 1.5 i (EK3) / 1.5 / 1.6 (EK1) / 1.6D15Z3, D15Z6, D16Y4, D16Y5, D16Y790–120 hp1995–2001
    HONDACIVIC VI Saloon (EJ, EK, SO) 1.5 i (EK3) / 1.6 i Vtec (EK1, SO4) / 1.6 (EK1) / 1.6 / 1.6 (EK1, EJ6)D15Z6, D16Y4, D16Y5, D16Y7, D16Y8106–129 hp1995–2001
    HONDACIVIC VI Aerodeck (MB, MC) 1.5 16V (MB9) / 1.6 16V (MC1)D15Z8, D16B2114–116 hp1998–2001
    HONDAHR-V (GH_) 1.6 16V 4WD (GH2, GH4) / 1.6 16V (GH1, GH3)D16W1105 hp1999–
    HONDACONCERTO Saloon (HWW) 1.5 i 16V / 1.6 i 16V / 1.6 16VD15B2, D16A8, D16Z290–122 hp1989–1995
    HONDAACCORD VI (CK, CG, CH, CF, CL) 1.6 i (CG7)D16B6116 hp1998–2002
    HONDACIVIC VI Coupe (EJ, EM1) 1.6 i Vtec (EM1) / 1.6 i (EJ6) / 1.6 (EJ6) / 1.6 / 1.6 (EJ8)D16Y5, D16Y7, D16Y8105–129 hp1996–2000
    HONDAINTEGRA Hatchback (DA) 1.6 (DA1, DA3) / 1.6D16A3120–125 hp1986–1989
    HONDACITY III Saloon (3A_, SX8) 1.5 (CG3)D15B7105 hp1997–1999
    HONDACITY Saloon 1.5 (3A3)D15B7105 hp1999–2003
    HONDAACCORD VI Hatchback (CH, CL) 1.6 (CH5)D16B6116 hp1999–2002
    HONDACR-V I (RD) 2.0 4WD (RD1) / 2.0 (RD2) / 2.0B20B4, B20Z2128–148 hp1996–2001
    HONDAINTEGRA Coupe (DC) 1.6 i (DC1)ZC1120 hp1993–2001
    HONDAINTEGRA Saloon (DB6, DB7, DB8, DB9) 1.6 (DB6) / 1.6 4WD (DB9)ZC1120 hp1993–2001
    HONDACITY IV Saloon (GE4) 1.5D15B7105 hp2002–2008
    HONDACIVIC III Saloon (AM, AK, AU) 1.6 (SC9)ZC1124 hp1987–1988
    ACURAINTEGRA Saloon 1.6 / 1.6 iD16A3, D16A8100–120 hp1985–1990
    ACURAINTEGRA Hatchback 1.6 / 1.6 iD16A1, D16A8100–120 hp1985–1990
    ACURAINTEGRA Coupe 1.6 / 1.6 iD16A3, D16A8100–120 hp1985–1990
    ACURAEL Saloon 1.6D16Y8129 hp1996–2000

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