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
2.5L 20v - ST225
Manufacturers
2.5L 20v - ST225
View larger Warning: Last items in stock!
New product
Set of 12 tri-metal crankshaft half shells for the six main bearings of the Ford HYDA and Volvo B5202 engines.
The Ford Focus II (engine code HYDA, 225 hp) and the Volvo 850, S70 and V70 (engine codes B 5202 S and B 5202 FS, 126 hp) are fitted with these engines. King lists main bearing set MB612XP for these applications: a single set covers these engines.
The crankshaft of these engines runs on six 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 KING RACING 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 contains 12 half shells, six pairs for six 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.
| King bearings Crankshaft journal Ø 64.99 / 65.00 mm Housing bore Ø 69.00 / 69.01 mm Width 19.4 mm (main bearing 6: 25.9 mm) |
| Reference | Brand and treatment | Size | Wall thickness (mm) |
|---|---|---|---|
| MB612XP | King Racing - Untreated | Standard | 1.989 (main bearings 1 to 5) 1.994 (main bearing 6) |
| MB612XP0.25 | King Racing - Untreated | +0.25 | 2.116 (main bearings 1 to 5) 2.121 (main bearing 6) |
| MB612XP0.5 | King Racing - Untreated | +0.50 | 2.243 (main bearings 1 to 5) 2.248 (main bearing 6) |
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 | King XP |
|---|---|---|
| Standard (STD) | Standard journal, not reground | 0.065 mm - 0.078 mm |
| +0.25 mm | Journal reground to 0.25 mm | 0.065 mm - 0.078 mm |
| +0.50 mm | Journal reground to 0.50 mm | 0.065 mm - 0.078 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 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.
 | 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 | King Racing |
| Cross-section |  |
| Type | High-performance trimetal bearing |
| Country of manufacture | Israel |
| Construction | Trimetal: steel back, copper layer, soft surface |
| Alloy | pMax Black (hardened copper-lead) |
| Protective coating | No |
| Available sizes | Standard, +0.25 mm, +0.50 mm |
This main bearing set fits the following vehicles, according to the engine code:
| Brand | Model (chassis) | Engine code | Power | Years |
|---|---|---|---|---|
| Ford | Focus II (DA_, HCP, DP) | HYDA | 225 hp | 2005–2012 |
| Volvo | 850 (854) | B 5202 S | 126 hp | 1994–1996 |
| Volvo | 850 Estate (855) | B 5202 S | 126 hp | 1994–1996 |
| Volvo | S70 (874) | B 5202 FS, B 5202 S | 126 hp | 1997–2000 |
| Volvo | V70 I (875, 876) | B 5202 FS, B 5202 S | 126 hp | 1995–2000 |
