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2.0L 16v - B204
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2.0L 16v - B204
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Set of 10 tri-metal crankshaft main bearing half shells for Saab 2.0 and 2.3 litre 16v engines (Ø 58 mm).
This main bearing set fits the Saab four-cylinder 16-valve petrol engines of 2.0 and 2.3 litres, naturally aspirated and turbocharged: B202, B204, B205, B206, B234 and B235. They are fitted to the Saab 900 (first and second generation), 9000, 9-3 and 9-5. 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 identical.
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 57.981 / 58.000 mm Housing bore Ø 62.000 / 62.019 mm Width 21.5 mm |
Manufacturer's note (ACL 5M2015H): has 3 oil holes in each half.
| Reference | Brand and treatment | Size | Wall thickness (mm) |
|---|---|---|---|
| 5M2015H-STD | ACL Race - Untreated | Standard | 1.990 |
| 5M2015HX-STD | ACL Race - Untreated | Std, increased clearance (HX) | 1.977 |
| 5M2015H-.25 | ACL Race - Untreated | +0.25 | 2.115 |
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 | 0.059 to 0.071 mm |
| Increased clearance (HX) | Wider clearance: high oil flow, high rpm | 0.085 to 0.096 mm |
| +0.25 mm | Journal reground to 0.25 mm | 0.059 to 0.071 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 |
|---|---|---|---|---|
| Saab | 9-3 (YS3D) | B204E, B204I, B204L, B204R, B205E, B205L, B205R, B234I, B235R | 131–230 hp | 1998–2002 |
| Saab | 9-3 Cabriolet (YS3D) | B204E, B204I, B204L, B204R, B205E, B205L, B205R, B234I, B235R | 131–230 hp | 1998–2003 |
| Saab | 9-5 (YS3E) | B205E, B205L, B235E, B235L, B235R | 150–305 hp | 1997–2009 |
| Saab | 9-5 Estate (YS3E) | B205E, B205L, B235E, B235L, B235R | 150–305 hp | 1998–2009 |
| Saab | 900 I (AC4, AM4) | B202I, B202L, B202S, B202XI, B202XL | 125–175 hp | 1984–1993 |
| Saab | 900 I Combi Coupe | B202I, B202L, B202S, B202XI, B202XL | 125–180 hp | 1984–1994 |
| Saab | 900 I Convertible | B202I, B202S, B202XL | 126–175 hp | 1986–1994 |
| Saab | 900 II | B204I, B204L, B206I, B234I | 131–185 hp | 1993–1998 |
| Saab | 900 II Coupe | B204I, B204L, B206I, B234I | 131–185 hp | 1993–1998 |
| Saab | 900 II Convertible | B204I, B204L, B234I | 131–185 hp | 1993–1998 |
| Saab | 9000 | B202I, B202L, B202S, B202XL, B204E, B204I, B204L, B204S, B234E, B234I, B234L, B234R | 128–224 hp | 1985–1998 |
| Saab | 9000 Hatchback | B202I, B202L, B202S, B202XI, B202XL, B204E, B204I, B204S, B234E, B234I, B234L, B234R | 125–228 hp | 1984–1998 |
| Volvo | 740 (744) | B204E | 140 hp | 1987–1990 |
| Volvo | 740 Kombi (745) | B204E | 136–140 hp | 1987–1990 |
| Volvo | 940 (944) | B204E | 140 hp | 1990–1992 |
| Volvo | 940 Kombi (945) | B204E | 140 hp | 1990–1992 |
| Volvo | 960 (964) | B204E | 140 hp | 1990–1993 |
| Volvo | 960 Kombi (965) | B204E | 140 hp | 1990–1993 |
