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1.8L 16v - 4G93
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1.8L 16v - 4G93
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Set of 10 tri-metal crankshaft main bearing half shells for Mitsubishi 4G91, 4G92, 4G93 and 4G94 engines (Ø 50 mm).
This main bearing set fits the Mitsubishi family of four-cylinder 16-valve petrol engines: the 4G91 (1.5 L), 4G92 (1.6 L), 4G93 (1.8 L, naturally aspirated, GDI and turbo) and 4G94 (2.0 L), fitted notably to the Mitsubishi Lancer, Colt, Galant, Carisma, Space Star, Space Wagon, Space Runner and Pajero Pinin, and to the Proton Wira, Satria and Persona. All the applications listed below share the same crankshaft journal and housing dimensions: a single bearing set covers these engines.
The crankshaft of these engines runs on five main bearings. Each journal turns between two half shells, one seated in the block and the other in the main bearing cap: they carry the crankshaft. The ACL Race Series tri-metal set shown here replaces them on built engines.
A tri-metal 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 covers the five main bearings of the crankshaft. The upper and lower half shells are different: each goes in its own position.
An aluminium bi-metal takes around 8,000 psi, a performance tri-metal up to 12,000 psi, 50% more. Hence better resistance and better durability on turbocharged, supercharged and high-revving engines.
| ACL bearings Crankshaft journal Ø 49.982 / 50.000 mm Housing bore Ø 54.000 / 54.018 mm Width 19.13 mm |
| Reference | Brand and treatment | Size | Wall thickness (mm) |
|---|---|---|---|
| 5M8037H-STD | ACL Race - Untreated | Standard | 1.991 |
| 5M8037H-.25 | ACL Race - Untreated | +0.25 |
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 / grade | When to choose it | ACL Race Series |
|---|---|---|
| Standard (STD) | Standard journal, not reground | 0.053 to 0.063 mm |
| +0.25 mm | Journal reground to 0.25 mm | 0.053 to 0.063 mm |
Checking on assembly: lay a calibrated strip (Plastigauge) on the journal, torque the main cap to spec, then compare the crushed strip against the gauge to read the clearance.
The ACL main 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.
 | ACL 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. |
This main bearing set fits the following vehicles, by engine code:
| Brand | Model (chassis) | Engine code | Power | Years |
|---|---|---|---|---|
| Changfeng | Feiteng | 4G94 | 121 hp | 2004–2017 |
| Changfeng | Leopaard CS7 | 4G94 | 121 hp | 2009–2012 |
| Dodge | Colt Hatchback | 4G91 | 137 hp | 1989 |
| Eagle | Summit Saloon | 4G91 | 114 hp | 1988–1990 |
| Fengxing | Lingzhi | 4G94 | 121 hp | 2007–2018 |
| Fengxing | Lingzhi | 4G94 | 121 hp | 2017– |
| Gonow (Gac) | Kairui | 4G94 | 121 hp | 2006–2010 |
| Mitsubishi | Carisma (DA_) | 4G92, 4G93 | 90–140 hp | 1995–2006 |
| Mitsubishi | Carisma Saloon (DA_) | 4G92, 4G93 | 90–115 hp | 1996–2006 |
| Mitsubishi | Colt IV (CA_A) | 4G92, 4G93 | 90–140 hp | 1992–1996 |
| Mitsubishi | Colt V (CJ_, CP_) | 4G92, 4G93 | 90–148 hp | 1996–2003 |
| Mitsubishi | Dion MPV (CR_W) | 4G93-T, 4G94 | 135–165 hp | 1999–2005 |
| Mitsubishi | Eclipse Convertible | 4G93 | 139 hp | 1994–1999 |
| Mitsubishi | Eclipse Convertible (D5_A) | 4G93 | 141 hp | 1999–2005 |
| Mitsubishi | Expo LRV Station Wagon | 4G93 | 114 hp | 1991–1994 |
| Mitsubishi | FTO Coupe (DE_A) | 4G93 | 125 hp | 1994–2001 |
| Mitsubishi | Galant IX Saloon (DJ_, ED_, EF_) | 4G94 | 145 hp | 2003– |
| Mitsubishi | Galant VII (E5_A, E7_A, E8_A) | 4G93 | 116–126 hp | 1992–1996 |
| Mitsubishi | Galant VII Saloon (E5_A, E7_A, E8_A) | 4G93 | 116–126 hp | 1992–1996 |
| Mitsubishi | Galant VIII (EA_) | 4G94 | 146 hp | 1997–2004 |
| Mitsubishi | Galant VIII Estate (EA_, EC_) | 4G94 | 145 hp | 1996–2002 |
| Mitsubishi | Lancer IV Hatchback (C6_A, C7_A) | 4G92, 4G93 | 113–140 hp | 1992–1994 |
| Mitsubishi | Lancer V (CB_A, CD_A, CE_A) | 4G92, 4G93, 4G93-T | 90–257 hp | 1991–1996 |
| Mitsubishi | Lancer V Hatchback (CA_A, CC_A) | 4G92 | 97 hp | 1992–1996 |
| Mitsubishi | Lancer V Coupe (CC) | 4G93 | 117–156 hp | 1992–1996 |
| Mitsubishi | Lancer V Station Wagon (CB_W, CD_W) | 4G92, 4G93, 4G93-T | 113–215 hp | 1992–2003 |
| Mitsubishi | Lancer VI (CJ_, CP_, CK_) | 4G92, 4G93, 4G93-T, 4G94 | 90–205 hp | 1995–2003 |
| Mitsubishi | Lancer VI Coupe (CJ_A, CE) | 4G93 | 117 hp | 1996–2004 |
| Mitsubishi | Lancer VI Convertible (CJ_A) | 4G93 | 117 hp | 2001–2003 |
| Mitsubishi | Lancer VII (CS_A, CT_A) | 4G93, 4G94 | 115–140 hp | 2000–2013 |
| Mitsubishi | Lancer VII Estate (CS_W, CT_W) | 4G93-T, 4G94 | 125–165 hp | 2003–2008 |
| Mitsubishi | Mirage IV Saloon | 4G92, 4G93 | 114–140 hp | 1991–1995 |
| Mitsubishi | Mirage IV Hatchback (CJ_A, CL_A, CA_A, CC_A) | 4G91, 4G92 | 105–119 hp | 1991–1996 |
| Mitsubishi | Mirage IV Coupe | 4G93 | 114 hp | 1992–1996 |
| Mitsubishi | Mirage IV Station Wagon | 4G93 | 140 hp | 2001–2003 |
| Mitsubishi | Mirage V Saloon (CK_A) | 4G93, 4G93-T | 114–207 hp | 1995–2001 |
| Mitsubishi | Mirage V Hatchback (CJ_A) | 4G92 | 114 hp | 1999–2003 |
| Mitsubishi | Mirage V Coupe (CJ - CM) | 4G93 | 113 hp | 1996–2002 |
| Mitsubishi | Pajero Pinin I (H6_W, H7_W) | 4G93, 4G93-T, 4G94 | 114–136 hp | 1999–2007 |
| Mitsubishi | Pajero Sport I (K7_, K9_) | 4G93, 4G94 | 114–129 hp | 2001–2005 |
| Mitsubishi | Pajero TR4 (H7_W, H6_W) | 4G94 | 133–140 hp | 2007–2015 |
| Mitsubishi | Space Runner MPV (N1_W, N2_W) | 4G93 | 116–122 hp | 1991–1999 |
| Mitsubishi | Space Star MPV (DG_A) | 4G92, 4G93 | 98–112 hp | 2001–2004 |
| Mitsubishi | Space Wagon (N3_W, N4_W) | 4G93 | 122 hp | 1991–1998 |
| Mitsubishi | Space Wagon (N9_W, N8_W) | 4G93 | 126 hp | 2002–2004 |
| Proton | Satria (C9_M) | 4G92 | 120 hp | 1995–2002 |
| Proton | Wira | 4G92 | 111 hp | 1997–2005 |
| Proton | Wira Hatchback (C9_L) | 4G92 | 111 hp | 1995–2002 |
| Soueast | Freeca Landio | 4G94 | 121 hp | 2006–2010 |
