Product successfully added to your shopping cart
Quantity
Total
There are 0 items in your cart. There is 1 item in your cart.
Total products
Total shipping To be determined
Total
2.4L 16v - 4G64
Manufacturers
2.4L 16v - 4G64
Warning: Last items in stock!
New product
Set of 8 trimetal connecting rod half-bearings for Mitsubishi petrol four-cylinder engines.
The 4G30 to 4G37 (1.2 to 1.8 litre), 4G61 (1.6 litre, naturally aspirated or turbo), 4G62 (1.8 litre) and 4G64 (2.4 litre), as well as the G31B, G32B, G33B, G37B, G62B, G63B and G64B, are inline petrol four-cylinder engines of Mitsubishi, fitted notably to the Colt, Lancer, Mirage, Galant, Sapporo, Sigma, Cordia, Tredia, Space Wagon, Eclipse, Pajero, L200 and L300. 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.
In a trimetal bearing, a steel back carries a copper-lead intermediate layer with high load capacity, itself covered by an anti-friction running layer that spares the crankpin. The set is supplied complete: 8 half shells, i.e. 4 pairs.
Trimetal targets high, sustained loads, whereas aluminium bi-metal is limited to low to medium loads: about 8,000 psi for the latter, up to 12,000 psi for a performance trimetal, 50% more. The benefit shows in strength and durability on turbo, supercharged and high-revving engines.
| ACL bearings Crankpin Ø 44.991 / 45.000 mm Housing bore Ø 48.000 / 48.020 mm Width 23.5 mm |
| Reference | Brand and treatment | Size | Wall thickness (mm) |
|---|---|---|---|
| 4B1146H-STD | ACL Race - Untreated | Standard | 1.489 |
| 4B1146HX-STD | ACL Race - Untreated | Std, increased clearance (HX) | 1.476 |
| 4B1146H-.025 | ACL Race - Untreated | +0.025 | 1.5015 |
| 4B1146H-.25 | ACL Race - Untreated | +0.25 | 1.614 |
Running clearance is the gap between the bearing and the crankpin, filled by the oil film.
While the engine turns, the crankpin floats on this oil film, which carries the load without direct contact with the bearing. Film thickness depends on clearance: too tight, oil passes poorly, temperature rises and the risk of seizure grows; too wide, oil escapes, the film carries less and oil pressure decreases. A correct clearance ensures both sufficient lubrication and a well-maintained film.
| Size / grade | When to choose it | ACL Race Series |
|---|---|---|
| Standard (STD) | Standard journal, not reground | 0.049 to 0.058 mm |
| Increased clearance (HX) | Wider clearance: high oil flow, high rpm | 0.074 to 0.083 mm |
| +0.025 mm | Polished journal | 0.049 to 0.058 mm |
| +0.25 mm | Journal reground to 0.25 mm | 0.049 to 0.058 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.
These ACL trimetal connecting rod bearings are aimed at built engines and racing: where a standard bearing quickly reaches its limit, they accept more power, more rpm and more boost. The range includes the standard size, a +0.025 mm size for a crankpin that has only been polished, a +0.25 mm regrind size and the HX version with increased clearance for high-revving engines or engines needing a high oil flow. It allows the same part number to be kept after the crankshaft is reground and the clearance to be tailored to the oil used and the engine's duty.
 | An Australian specialist in high-performance engine bearings since 1949, ACL Bearing Company produces the Race Series: precisely made trimetal bearings, available in numerous sizes and recognised on built engines across the world. |
This connecting rod bearing set fits the 4G30 to 4G37, 4G61, 4G62, 4G64 and G31B to G64B petrol four-cylinder engines of the following Mitsubishi models:
| Brand | Model (chassis) | Engine code | Power | Years |
|---|---|---|---|---|
| MITSUBISHI | COLT II (C1_A) 1.4 (C12A) / 1.6 (C13A) | 4G33, 4G32 (SOHC 8V) | 73–80 hp | 1982–1986 |
| MITSUBISHI | COLT III (C5_A) 1.6 GTi 16V (C53A) / 1.4 / 1.6 | 4G61 (DOHC 16V), 4G33, 4G32 (SOHC 8V) | 76–124 hp | 1986–1990 |
| MITSUBISHI | CORDIA (A21_A, AB, AC) 1.6 GSL (A212A) / 1.8 GSL (A215A) / 1.8 (A215A) / 1.8 (A213A) | 4G32 (SOHC 8V), 4G37, 4G62 (SOHC 8V) | 75–95 hp | 1982–1989 |
| MITSUBISHI | ECLIPSE Convertible 1.8 | 4G37 | 92 hp | 1989–1994 |
| MITSUBISHI | ECLIPSE I (D2_A) 1.8 (D21A) | 4G37 | 92 hp | 1989–1994 |
| MITSUBISHI | EXPO Station Wagon 2.4 | 4G64 (SOHC 8V) | 118 hp | 1991–1992 |
| MITSUBISHI | GALANT III (A12_) 1.6 (A121) | 4G32 (SOHC 8V) | 75 hp | 1977–1980 |
| MITSUBISHI | GALANT III Station Wagon (A12_V) 1.6 GL (A121V) | 4G32 (SOHC 8V) | 75 hp | 1979–1980 |
| MITSUBISHI | GALANT IV (A16_) 1.6 GLX (A161A) | 4G32 (SOHC 8V) | 75 hp | 1980–1984 |
| MITSUBISHI | GALANT IV Station Wagon (A16_V) 1.6 GLX (A161V) | 4G32 (SOHC 8V) | 75 hp | 1980–1984 |
| MITSUBISHI | GALANT V (E1_A) 1.6 GLX (E11A) / 2.0 GLS (E15A) / 2.4 GLS (E16A) / 2.4 / 1.8 (E12A) | 4G32 (SOHC 8V), G63B, G64B, 4G64 (SOHC 8V), 4G37 | 75–125 hp | 1984–1990 |
| MITSUBISHI | GALANT VI (E3_A) 1.8 (E32A) / 1.8 | 4G37 | 86–90 hp | 1988–1992 |
| MITSUBISHI | GALANT VI Saloon (E3_A) 1.8 (E32A) / 1.6 (E31A) / 1.8 (E37A) | 4G37, 4G32 (SOHC 8V) | 75–94 hp | 1987–1993 |
| MITSUBISHI | L 300 / DELICA II Bus (L03_P/G, L0_2P) 1.6 (L032P, L062P) / 1.8 4WD (L035G) / 2.0 DL / 1.8 (L035P) / 1.6 (L032P, L032W) | 4G32 (SOHC 8V), 4G62 (SOHC 8V), G63B | 65–90 hp | 1980–1987 |
| MITSUBISHI | L 300 / DELICA II Platform/Chassis (L03_P) 1.6 (L032P, L062P, L036P) / 2.0 / 1.8 | 4G32 (SOHC 8V), G63B, 4G62 (SOHC 8V) | 70–90 hp | 1982–1994 |
| MITSUBISHI | L 300 / DELICA II Van (L03_P) 1.6 (L032P, L062P) / 2.0 DL (L037P) / 1.6 (L062P, L032P) / 1.8 (L035P) / 1.8 4WD (L035P) | 4G32 (SOHC 8V), G63B, 4G62 (SOHC 8V) | 65–90 hp | 1980–1986 |
| MITSUBISHI | L 300 III Bus (P0_W, P1_W, P2_W, P3_W) 1.6 (P02W, P12W) / 2.0 (P03W, P13W) / 2.4 4WD (P24W) / 2.4 (P04W, P14W) | 4G32 (SOHC 8V), G63B, G64B, 4G64 (SOHC 8V) | 69–112 hp | 1986–2004 |
| MITSUBISHI | L 300 III Van (P0_V, P1_V, P2_V) 1.6 (P12V, P02V) / 2.0 (P03V, P13V) / 1.4 (P01V, P11V) / 2.0 (P23W, P23V) / 2.4 (P24V, P24W) / 2.4 4WD (P24V, P24W) / 2.4 (P04V, P14V) | 4G32 (SOHC 8V), G63B, 4G33, G64B, 4G64 (SOHC 8V) | 68–112 hp | 1986–1997 |
| MITSUBISHI | L200 1.6 | 4G32 (SOHC 8V) | 82 hp | 1980–1986 |
| MITSUBISHI | L200 (K3_T, K2_T, K1_T, K0_T) 1.6 (K11T) / 2.4 4WD / 2.4 | 4G32 (SOHC 8V), 4G64 (SOHC 8V) | 82–124 hp | 1986–1996 |
| MITSUBISHI | L400 Van (PD_W, PC_W, PB_V, PA_W, PA_V) 1.6 | 4G32 (SOHC 8V) | 69 hp | 1996–2002 |
| MITSUBISHI | LANCER CELESTE Coupe (A7_) 1.6 ST (A73A) | 4G32 (SOHC 8V) | 73 hp | 1977–1981 |
| MITSUBISHI | LANCER F (A15_) 1.4 (A156) / 1.6 (A157) | 4G33, 4G32 (SOHC 8V) | 73–80 hp | 1984–1986 |
| MITSUBISHI | LANCER I (A7_) 1.2 (A75A) / 1.4 (A72A) / 1.6 (A73A) | 4G36, 4G33, 4G32 (SOHC 8V) | 55–82 hp | 1975–1979 |
| MITSUBISHI | LANCER I Station Wagon (A7_V) 1.4 (A72V) | 4G33 | 68 hp | 1978–1979 |
| MITSUBISHI | LANCER II (A17_) 1.6 (A174) | 4G32 (SOHC 8V) | 82–84 hp | 1979–1983 |
| MITSUBISHI | LANCER III (C1_A, C6_A) 1.4 / 1.6 | 4G33, 4G32 (SOHC 8V) | 76–80 hp | 1986–1990 |
| MITSUBISHI | LANCER III Station Wagon (C1_V, C3_V) 1.8 4WD (C37V) | G37B, 4G37 | 83–94 hp | 1987–1992 |
| MITSUBISHI | LANCER IV (C6_A, C7_A) 1.6 GTi (C63A) / 1.6 GLX (C63A) / 1.6 GSR Turbo (C63A) / 1.6 GSR Turbo 4WD (C73A) | 4G61 (DOHC 16V), 4G61-T (DOHC 16V) | 124–146 hp | 1988–1992 |
| MITSUBISHI | LANCER IV Hatchback (C6_A, C7_A) 1.8 4WD (C77A) / 1.6 GTi (C63A) / 1.8 GTi (C77A) / 1.6 i (C63A) | 4G37, 4G61 (DOHC 16V) | 95–124 hp | 1988–1993 |
| MITSUBISHI | LANCER V (CB_A, CD_A, CE_A) 1.8 GTi | 4G37 | 95 hp | 1992–1993 |
| MITSUBISHI | MIRAGE I Saloon (A15_) 1.6 (A157) | G32B, 4G32 (SOHC 8V) | 88 hp | 1979–1983 |
| MITSUBISHI | MIRAGE II Saloon (C10) 1.5 (C18A) | G31B | 71 hp | 1986–1988 |
| MITSUBISHI | MIRAGE II Hatchback (C10) 1.5 (C18V) | G31B | 71 hp | 1986–1988 |
| MITSUBISHI | MIRAGE III Hatchback (C5_ - C8_) 1.6 Gti (C53A) / 1.6 Turbo (C53A) / 1.6 Turbo / 1.6 Turbo (C83A) | 4G61 (DOHC 16V), 4G61-T (DOHC 16V) | 125–145 hp | 1988–1991 |
| MITSUBISHI | MIRAGE III Station Wagon 1.8 GS 4WD (C37W) / 1.5 (C18W) | G37B, G31B | 71–90 hp | 1986–1988 |
| MITSUBISHI | PAJERO I (L04_G, L14_G) 2.0 4WD (L041G, L046G, L146G) | G63B | 110 hp | 1983–1991 |
| MITSUBISHI | PAJERO II (V3_W, V2_W, V4_W, V5_W) 2.4 (V21W) | 4G64 (SOHC 8V) | 112 hp | 1991–1999 |
| MITSUBISHI | PAJERO II Canvas Top (V2_C, V4_C) 2.4 (V21C) | 4G64 (SOHC 8V) | 112 hp | 1991–2000 |
| MITSUBISHI | SAPPORO I (A12_) 1.6 SL, GL (A121) | 4G32 (SOHC 8V) | 75 hp | 1978–1980 |
| MITSUBISHI | SAPPORO II (A16_A) 1.6 GLX (A161A) | 4G32 (SOHC 8V) | 75 hp | 1980–1984 |
| MITSUBISHI | SAPPORO III (E16A) 2.4 (E16A) | 4G64 (SOHC 8V) | 124 hp | 1987–1990 |
| MITSUBISHI | SIGMA (GE) 1.6 | 4G32 (SOHC 8V) | 76 hp | 1977–1980 |
| MITSUBISHI | SIGMA (GJ, GK, GN) 1.6 | 4G32 (SOHC 8V) | 82 hp | 1982–1985 |
| MITSUBISHI | SIGMA Estate (GJ, GK, GN) 1.6 | 4G32 (SOHC 8V) | 82 hp | 1982–1985 |
| MITSUBISHI | SPACE WAGON (D0_V/W) 1.8 GLX (D05V, D05W) / 2.0 GLX (D04W) / 2.0 GLX 4WD (D08W) / 1.8 4WD (D05V, D05W) / 1.8 GLX (D05W) / 1.8 (D05W, D05V) | 4G37, G63B, G37B | 84–95 hp | 1984–1991 |
| MITSUBISHI | SPACE WAGON (N3_W, N4_W) 2.4 | 4G64 (SOHC 8V) | 117 hp | 1991–1992 |
| MITSUBISHI | SPACE WAGON VAN (D0_V/W) 1.8 (D05V) | 4G37 | 86–90 hp | 1983–1988 |
| MITSUBISHI | TREDIA (A21_) 1.6 GLS (A212) / 1.8 GLS (A215) / 1.8 Turbo (A215A) / 1.8 Turbo / 2.0 / 1.8 GLS 4WD (A215G) / 1.8 | 4G32 (SOHC 8V), 4G37, G62B, G63B, 4G62 (SOHC 8V) | 75–136 hp | 1982–1988 |
Replacing the bearings during a build or rebuild guards against the most expensive failure: a worn-out connecting rod bearing scores the crankpin, contaminates the oil circuit with debris and forces at least a crankshaft regrind, or even a new rod and block. Against such costs a new set weighs little: it is the cheapest part of the rotating assembly, but the one whose failure costs the most.
