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1.6L 16v - M16A
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1.6L 16v - M16A
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Set of 10 tri-metal crankshaft main bearing half shells for Suzuki M15A, M16A and M18A engines (Ø 52 mm).
The M15A, M16A and M18A are Suzuki four-cylinder 16-valve petrol engines, fitted notably to the Swift, Liana, Grand Vitara, SX4 and Jimny. 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 and KING RACING tri-metal sets shown here replace 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 contains 10 half shells, five pairs for five main bearings.
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 51.982 / 52.000 mm Housing bore Ø 56.000 / 56.018 mm Width 18.1 mm | King bearings Crankshaft journal Ø 51.981 / 51.999 mm Housing bore Ø 55.999 / 56.017 mm Width 18.2 mm |
| Reference | Brand and treatment | Size | Wall thickness (mm) |
|---|---|---|---|
| 5M8443H-STD | ACL Race - Untreated | Standard | 2.000 |
| 5M8443HX-STD | ACL Race - Untreated | Std, increased clearance (HX) | 1.987 |
| 5M8443H-.025 | ACL Race - Untreated | +0.025 | 2.013 |
| 5M8443H-.25 | ACL Race - Untreated | +0.25 | 2.125 |
| MB5727XP | King Racing - Untreated | Standard | 1.998 |
| MB5727XP.026 | King Racing - Untreated | +0.026 | 2.011 |
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 | King XP |
|---|---|---|---|
| Standard (STD) | Standard journal, not reground | 0.055 to 0.065 mm | 0.052 mm - 0.065 mm |
| Increased clearance (HX / STDX) | Wider clearance: high oil flow, high rpm | 0.080 to 0.090 mm | |
| +0.025 / +0.026 mm | Polished journal | 0.055 to 0.065 mm | 0.052 mm - 0.065 mm |
| +0.25 mm | Journal reground to 0.25 mm | 0.055 to 0.065 mm |
Check at assembly: lay a calibrated strip (Plastigauge) on the journal, tighten the main cap following the manufacturer's procedure, then compare the width of the crushed strip with the gauge to read the clearance.
The ACL and King 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 tri-metal bearings, available in many sizes and proven on built engines worldwide. |
 | King Engine Bearings, an Israeli manufacturer of high-performance engine bearings since the 1960s, offers with its pMax Black tri-metal alloy bearings designed for heavy loads. |
| Criterion | ACL Race Series | King Racing |
| Cross-section |  |  |
| Type | High-performance trimetal bearing | High-performance trimetal bearing |
| Country of manufacture | Australia | Israel |
| Construction | Trimetal: steel back, copper layer, soft surface | Trimetal: steel back, copper layer, soft surface |
| Alloy | Race Series (copper-lead) | pMax Black (hardened copper-lead) |
| Protective coating | No | No |
| Available sizes | Standard, +0.025 and +0.25 mm (+ increased clearance HX) | Standard and +0.026 mm |
This main bearing set fits the following vehicles fitted with the M15A, M16A and M18A engines:
| Brand | Model (chassis) | Engine code | Power | Years |
|---|---|---|---|---|
| Baic Huansu | H6 | M18A | 140 hp | 2016– |
| Fiat | Sedici (189_) | M16A | 107–120 hp | 2006–2014 |
| Maruti Suzuki | SX 4 | M16A | 87–106 hp | 2007–2014 |
| Suzuki | Grand Vitara II (JT, TE, TD) | M16A | 99–106 hp | 2005– |
| Suzuki | Jimny Véhicule tout terrain fermé (SN, JB_) | M16A | 103 hp | 2004– |
| Suzuki | Liana (ER, RH_) | M16A, M18A | 103–125 hp | 2001– |
| Suzuki | Liana Hatchback | M16A, M18A | 103–125 hp | 2001–2007 |
| Suzuki | SX4 (EY, GY) | M16A | 101–120 hp | 2006– |
| Suzuki | SX4 Saloon (GY, RW) | M16A | 101–120 hp | 2007– |
| Suzuki | SX4 S-cross (JY) | M16A | 116–126 hp | 2013–2022 |
| Suzuki | Swift III (MZ, EZ) | M16A | 125 hp | 2006–2015 |
| Suzuki | Swift IV (FZ, NZ) | M16A | 136–142 hp | 2012–2017 |
| Suzuki | Vitara (ET, TA, TD) | M16A | 106 hp | 2005–2007 |
| Suzuki | Vitara (LY) | M16A | 116–126 hp | 2015– |
| Suzuki (Changan) | SX4 Saloon | M16A, M18A | 109–131 hp | 2006–2017 |
| Suzuki (Changan) | SX4 Hatchback | M16A, M18A | 109–131 hp | 2007–2020 |
| Suzuki (Changhe) | Liana Saloon | M16A | 95–109 hp | 2005–2014 |
| Suzuki (Changhe) | Liana Hatchback | M16A | 95–109 hp | 2006–2014 |
