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
2.0 16v - F20C
Manufacturers
2.0 16v - F20C
View larger Warning: Last items in stock!
New product
Set of 10 tri-metal crankshaft main bearing half shells for Honda S2000 F20C and F22C engines (Ø 54.98 mm).
The F20C (2.0 litre) and F22C (2.2 litre) are the four-cylinder 16-valve VTEC engines of the Honda S2000. All the engines listed below share the same crankshaft journal and housing dimensions: a single bearing set covers the whole family.
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 54.976 / 55.000 mm Housing bore Ø 60.000 / 60.020 mm Width 20 mm | King bearings Crankshaft journal Ø 54.98 / 55.00 mm Housing bore Ø 60.00 / 60.02 mm Width 20 mm |
| Reference | Brand and treatment | Size | Wall thickness (mm) |
|---|---|---|---|
| 5M1913H-STD | ACL Race - Untreated | Standard | 2.504 |
| 5M1913HX-STD | ACL Race - Untreated | Std, increased clearance (HX) | 2.491 |
| 5M1913H-.025 | ACL Race - Untreated | +0.025 | 2.5165 |
| 5M1913H-.25 | ACL Race - Untreated | +0.25 | 2.629 |
| MB5673XP | King Racing - Untreated | Standard | 2.504 |
| MB5673XP STDX | King Racing - Untreated | Std, increased clearance (STDX) | 2.491 |
| MB5673XP.026 | King Racing - Untreated | +0.026 | 2.517 |
| MB5673XP0.25 | King Racing - Untreated | +0.25 | 2.631 |
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 | 0.057 to 0.068 mm | 0.055 mm - 0.068 mm |
| Increased clearance (HX / STDX) | Wider clearance: high oil flow, high rpm | 0.082 to 0.093 mm | 0.080 mm - 0.093 mm |
| +0.025 / +0.026 mm | Polished journal | 0.057 to 0.068 mm | 0.055 mm - 0.068 mm |
| +0.25 mm | Journal reground to 0.25 mm | 0.057 to 0.068 mm | 0.055 mm - 0.068 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 to +0.25 mm (+ increased clearance HX) | Standard to +0.25 mm (+ increased clearance STDX) |
This main bearing set fits the Honda F20C and F22C engines sharing the same crankshaft journal and housing dimensions:
| Brand | Model (chassis) | Engine code | Power | Years |
|---|---|---|---|---|
| Honda | S2000 (AP) 2.0 Vtec / 2.0 / 2.2 Vtec (AP2) / 2.2 | F20C1, F22C1 | 231–243 hp | 1999–2008 |
