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2.0L 16v - Z20LET
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2.0L 16v - Z20LET
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Set of 8 trimetal connecting rod half-bearings for Opel petrol four-cylinder engines of 1.6 to 2.2 litres.
These Opel petrol four-cylinder engines of 1.6 to 2.2 litres, with a single overhead camshaft and 8 valves (16N, 18E, 18SE, C18NZ, C20NE, 20SE) or twin overhead camshafts and 16 valves (C18XE, X18XE, Z18XE, C20XE, X20XEV, C22SEL, X22XE), naturally aspirated or turbocharged (C20LET, Z20LET), are fitted notably to the Kadett, Ascona, Manta, Rekord, Omega, Vectra, Astra, Calibra, Frontera, Zafira and Speedster. ACL and King list a single bearing set for these engines: same crankpin diameter, a single set covers the family.
From the factory, these engines are fitted with standard production connecting rod bearings, sized for the loads of the original engine: as soon as power, engine speed or boost pressure increase, they reach their limits.
Three layers make up a trimetal bearing: the steel back for stiffness, the copper-lead intermediate layer for load capacity, then the anti-friction running layer that protects the crankpin. This set includes 8 half shells, that is 4 pairs.
Where an aluminium bi-metal bearing, designed for low to medium loads, withstands about 8,000 psi, a performance trimetal bearing goes up to 12,000 psi: 50% extra margin. That is what keeps it durable on an engine boosted by a turbo or supercharger, or pushed to high rpm.
| ACL / King bearings Crankpin Ø 48.971 / 48.987 mm (King: 48.971 / 48.986 mm) Housing bore Ø 52.000 / 52.012 mm Width 19.3 mm |
| Reference | Brand and treatment | Size | Wall thickness (mm) |
|---|---|---|---|
| 4B2322H-STD | ACL Race - Untreated | Standard | 1.498 |
| 4B2322HX-STD | ACL Race - Untreated | Std, increased clearance (HX) | 1.485 |
| 4B2322H-.025 | ACL Race - Untreated | +0.025 | 1.5105 |
| 4B2322H-.25 | ACL Race - Untreated | +0.25 | 1.623 |
| 4B2322H-.50 | ACL Race - Untreated | +0.50 | 1.748 |
| 4B2322HC-STD | ACL Race - Calico CT-1 | Standard | 1.498 |
| 4B2322HC-.25 | ACL Race - Calico CT-1 | +0.25 | 1.623 |
| 4B2322HC-.50 | ACL Race - Calico CT-1 | +0.50 | 1.748 |
| CR4017XP STDX | King Racing - Untreated | Std, increased clearance (STDX) | 1.483 |
| CR4017XP.026 | King Racing - Untreated | +0.026 | 1.509 |
| CR4017XPC | King Racing - pMaxKote | Standard | 1.496 |
| CR4017XPC STDX | King Racing - pMaxKote | Std, increased clearance (STDX) | 1.483 |
| CR4017XPC.026 | King Racing - pMaxKote | +0.026 | 1.509 |
| CR4017XPC0.25 | King Racing - pMaxKote | +0.25 | 1.623 |
| CR4017XPC0.5 | King Racing - pMaxKote | +0.50 | 1.750 |
Between the crankpin and the bearing there is a small gap, the running clearance, in which the oil film circulates.
In operation there is no metal-to-metal contact: the crankpin turns on this oil film, which supports the whole load. The clearance determines its thickness. A clearance that is too tight hinders oil flow, heats the assembly and promotes seizure; one that is too wide lets oil leak away, weakens the film and makes oil pressure drop. The correct clearance balances oil flow and film strength.
| Size / grade | When to choose it | ACL Race Series | King XP / XPC |
|---|---|---|---|
| Standard (STD) | Standard journal, not reground | 0.052 to 0.062 mm | |
| Increased clearance (HX / STDX) | Wider clearance: high oil flow, high rpm | 0.078 to 0.087 mm | |
| +0.025 / +0.026 mm | Polished journal | 0.052 to 0.062 mm | |
| +0.25 mm | Journal reground to 0.25 mm | 0.052 to 0.062 mm | |
| +0.50 mm | Journal reground to 0.50 mm | 0.052 to 0.062 mm |
Checking on assembly: lay a calibrated strip (Plastigauge) on the journal, torque the rod cap to spec, then compare the crushed strip against the gauge to read the clearance.
Designed for engine building and motorsport, these ACL and King trimetal connecting rod bearings carry much more load than an original bearing, whether the engine gains power, revs higher or receives a turbo or supercharger. They are available in several sizes: the standard size, a +0.025 / +0.026 mm size for a crankpin that has only been polished, +0.25 and +0.50 mm regrind sizes and the HX / STDX version with increased clearance for high-revving engines or engines needing a high oil flow. That makes it possible to put a reground crankshaft back into service without changing range and to set the clearance for the oil and use.
 | 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. Its Calico version (HC suffix) adds the CT-1 coating, a dry film lubricant that reduces friction and abrasive wear. |
 | King Engine Bearings, an Israeli manufacturer active since the 1960s, produces high-performance engine bearings. Its pMax Black trimetal alloy is designed to withstand heavy loads, with the pMaxKote coating available as an option (XPC version). |
| 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 (Race); Calico CT-1 (HC) | pMaxKote (optional, XPC version): polymer coating on the surface that limits wear when lubrication drops (start-ups, thin oil film). |
| Available sizes | Standard to +0.25 mm (+ increased clearance HX) | Standard to +0.50 mm (+ increased clearance STDX) |
This connecting rod bearing set fits the petrol four-cylinder engines of the following Opel models:
| Brand | Model (chassis) | Engine code | Power | Years |
|---|---|---|---|---|
| OPEL | ASCONA A (81_, 86_, 87_, 88_) 1.6 N | 16N | 60–68 hp | 1970–1975 |
| OPEL | ASCONA A Voyage (84_, 89_) 1.6 N | 16N | 60–68 hp | 1970–1975 |
| OPEL | ASCONA B (81_, 86_, 87_, 88_) 1.6 N | 16N | 60 hp | 1975–1981 |
| OPEL | ASCONA C (J82) 1.6 S / 1.8 / 1.8 E / 1.8 i / 2.0 i GT / 2.0 i Cat | 16SH, 18E, 20SEH, C18NE, C20NE, E18NV, S18NV | 84–130 hp | 1981–1988 |
| OPEL | ASCONA C Hatchback (J82) 1.6 S / 1.8 / 1.8 E / 1.8 i / 2.0 i GT / 2.0 i Cat | 16SH, 18E, 20SEH, C18NE, C20NE, E18NV, S18NV | 84–130 hp | 1981–1988 |
| OPEL | ASTRA F Saloon (T92) 1.8 i / 1.8 i 16V / 2.0 i / 2.0 i 16V / 2.0 TS | 18SE, 20SEH, C18NZ, C18SEL, C18XE, C18XEL, C20LET, C20NE, X18XE, X20XEV | 90–204 hp | 1992–1998 |
| OPEL | ASTRA F Hatchback (T92) 1.8 i / 2.0 i / 2.0 GSI 16V / 1.8 i 16V / 2.0 i 16V / 1.8 / 2.0 TS | 18SE, C18NZ, C18XE, C18XEL, C20LET, C20NE, C20XE, X18XE, X20XEV | 90–204 hp | 1991–1998 |
| OPEL | ASTRA F Estate (T92) 1.8 i / 1.8 i 16V / 2.0 i / 2.0 i 16V / 1.8 | 18SE, C18NZ, C18XE, C18XEL, C20NE, C20XE, X18XE, X20XEV | 90–150 hp | 1991–1998 |
| OPEL | ASTRA F Convertible (T92) 2.0 i / 1.8 i 16V | C18XEL, C20NE, X18XE | 115–116 hp | 1993–2001 |
| OPEL | ASTRA F Fourgon/Estate (T92) 1.8 i | C18NZ | 90 hp | 1993–1994 |
| OPEL | ASTRA G Saloon (T98) 2.0 16V / 1.8 16V | X20XEV, Z18XE | 125–136 hp | 1998–2005 |
| OPEL | ASTRA G Hatchback (T98) 2.0 16V / 1.8 16V / 2.0 OPC | X20XEV, Z18XE, Z20LET | 125–200 hp | 1998–2005 |
| OPEL | ASTRA G Estate (T98) 2.0 16V / 1.8 16V / 2.0 OPC | X20XEV, Z18XE, Z20LET | 125–200 hp | 1998–2004 |
| OPEL | ASTRA G Coupé (T98) 2.0 16V Turbo / 1.8 16V | Z18XE, Z20LET | 125–200 hp | 2000–2005 |
| OPEL | ASTRA G Convertible (T98) 1.8 16V / 2.0 OPC / 2.0 16V Turbo | Z18XE, Z20LET | 125–200 hp | 2001–2005 |
| OPEL | ASTRA H (A04) 1.8 | Z18XE | 125 hp | 2004–2010 |
| OPEL | ASTRA H Estate (A04) 1.8 | Z18XE | 125 hp | 2004–2010 |
| OPEL | ASTRA H GTC (A04) 1.8 | Z18XE | 125 hp | 2005–2010 |
| OPEL | ASTRA H TwinTop (A04) 1.8 | Z18XE | 125 hp | 2005–2010 |
| OPEL | BLAZER 2.2 | C22NE | 114 hp | 1996–2002 |
| OPEL | CALIBRA A (C89) 2.0 i / 2.0 i 4x4 / 2.0 i 16V / 2.0 i 16V 4x4 / 2.0 i Turbo 4x4 | C20LET, C20NE, C20XE, X20XEV | 115–204 hp | 1989–1997 |
| OPEL | CORSA C (X01) 1.8 | Z18XE | 125 hp | 2000–2009 |
| OPEL | FRONTERA A (U92) 2.2 i / 2.0 i | C20NE, X20SE, X22XE | 115–136 hp | 1993–1998 |
| OPEL | FRONTERA A Sport (U92) 2.0 i | C20NE, X20SE | 115 hp | 1992–1998 |
| OPEL | FRONTERA B (U99) 2.2 i | X22SE, Y22SE | 136 hp | 1998–2004 |
| OPEL | KADETT D (31_-34_, 41_-44_) 1.6 S / 1.8 GT/E | 16SH, 18E | 90–115 hp | 1981–1984 |
| OPEL | KADETT D Estate (35_, 36_, 45_, 46_) 1.6 S | 16SH | 90 hp | 1981–1984 |
| OPEL | KADETT E (T85) 1.6 S / 1.8 S / 1.8 i / 2.0 i / 2.0 i Cat / 1.8 / 2.0 / 2.0 i 16V | 16SH, 18E, 18SE, 20SE, 20SEH, C18NE, C18NT, C18NZ, C20NE, C20XE, E18NV, S18NV | 84–150 hp | 1984–1993 |
| OPEL | KADETT E Hatchback (T85) 1.6 S / 1.8 S / 1.8 E / 1.8 GSI / 2.0 GSI / 2.0 GSI 16V / 1.8 i / 2.0 GSI Cat / 2.0 GSI 16V Cat / 1.8 | 16SH, 18E, 18SE, 18SEH, 20SEH, 20XE, C18NE, C18NT, C18NZ, C20NE, C20XE, E18NV, S18NV | 84–156 hp | 1984–1991 |
| OPEL | KADETT E Estate (T85) 1.6 S / 1.8 S / 1.8 E / 1.8 i / 2.0 i Cat / 1.8 | 16SH, 18E, 18SE, C18NE, C18NT, C18NZ, C20NE, E18NV, S18NV | 84–115 hp | 1984–1991 |
| OPEL | KADETT E Convertible (T85) 2.0 i / 2.0 i Cat / 2.0 GSi / 2.0 | 20SER, 20XE, C20NE, C20XE | 115–156 hp | 1986–1993 |
| OPEL | KADETT E Fourgon/Estate (T85) 1.8 i | C18NT | 90 hp | 1984–1992 |
| OPEL | MANTA A (58_, 59_) 1.6 | 16N | 60–68 hp | 1970–1975 |
| OPEL | MANTA B (58_, 59_) 1.6 N / 1.8 S | 16N, 18S | 60–90 hp | 1975–1987 |
| OPEL | MANTA B CC (53_, 55_) 1.6 N / 1.8 S | 16N, 18S | 60–90 hp | 1975–1987 |
| OPEL | MERIVA A MPV (X03) 1.8 | Z18XE | 125 hp | 2003–2010 |
| OPEL | OMEGA A (V87) 1.8 N / 1.8 / 1.8 S / 2.0 / 2.0 i | 18NV, 18SEH, 20SE, C20NE, E18NVR | 82–122 hp | 1986–1994 |
| OPEL | OMEGA A Estate (V87) 1.8 N / 1.8 / 2.0 / 2.0 i | 18NV, 18SEH, 20SE, C20NE, E18NVR | 82–122 hp | 1986–1994 |
| OPEL | OMEGA B (V94) 2.0 / 2.0 16V | 20SE, X20SE, X20XEV | 115–136 hp | 1994–2000 |
| OPEL | OMEGA B Estate (V94) 2.0 / 2.0 16V | X20SE, X20XEV | 116–136 hp | 1994–1999 |
| OPEL | REKORD E (17_, 11_, 14_, 16_, 18_, 19_) 1.8 / 1.8 S / 1.8 E | 18N, 18S, C18NV | 75–100 hp | 1982–1986 |
| OPEL | REKORD E Estate (61_, 66_, 67_) 1.8 / 1.8 S / 1.8 E | 18N, 18S, C18NV | 75–100 hp | 1982–1986 |
| OPEL | REKORD E2 (17_, 16_) 2.0 | 20SE, 20SEH | 116–129 hp | 1986–1995 |
| OPEL | SIGNUM Hatchback (Z03) 1.8 | Z18XE | 122 hp | 2003–2005 |
| OPEL | SINTRA (APV) 2.2 i 16V | X22XE | 141 hp | 1996–1999 |
| OPEL | SPEEDSTER (E01) 2.0 Turbo | Z20LET | 200 hp | 2002–2006 |
| OPEL | TIGRA TwinTop (X04) 1.8 | Z18XE | 125 hp | 2004–2010 |
| OPEL | VECTRA A (J89) 1.8 S / 1.8 S 4x4 / 2.0 i / 2.0 i 4x4 / 1.8 i Cat / 2.0 i Turbo 4x4 / 2.0 i 16V / 2.0 i 16V 4x4 / 2.0 i Cat / 2.0 i Cat 4x4 / 2000/GT 16V Cat / 2000/GT 16V Cat 4x4 | 20SEH, C18NZ, C20LET, C20NE, C20XE, E18NVR, X20XEV | 88–204 hp | 1988–1995 |
| OPEL | VECTRA A Hatchback (J89) 1.8 S / 2.0 i GT / 1.8 i Cat / 2.0 i 16V / 2.0 i Cat / 2.0 i 16V Cat / 2.0 AWD | 20SEH, C18NZ, C20NE, C20XE, E18NVR, X20XEV | 88–150 hp | 1988–1995 |
| OPEL | VECTRA B (J96) 2.0 i 16V / 1.8 i 16V / 2.0 i / 2.2 i 16V | C20NE, C20SEL, C22SEL, X18XE, X20XEV, Z18XE | 116–139 hp | 1995–2002 |
| OPEL | VECTRA B Hatchback (J96) 2.0 i 16V / 1.8 i 16V / 2.2 i 16V / 1.8 FlexFuel | C20SEL, C22SEL, X18XE, X20XEV, Z18XE | 116–139 hp | 1995–2003 |
| OPEL | VECTRA B Estate (J96) 2.0 i 16V / 1.8 i 16V / 2.2 i 16V | C20SEL, C22SEL, X18XE, X20XEV, Z18XE | 116–139 hp | 1996–2003 |
| OPEL | VECTRA C (Z02) 1.8 16V | Z18XE | 122 hp | 2002–2008 |
| OPEL | VECTRA C Estate (Z02) 1.8 | Z18XE | 122 hp | 2003–2006 |
| OPEL | VECTRA C GTS (Z02) 1.8 16V | Z18XE | 122 hp | 2002–2008 |
| OPEL | ZAFIRA A MPV (T98) 1.8 16V / 2.0 OPC | Z18XE, Z20LET | 125–200 hp | 2000–2005 |
When a connecting rod bearing gives way, the damage quickly spreads beyond the part itself: a scored crankpin, debris carried through the whole oil circuit, a crankshaft to regrind at the very least, sometimes a rod and block lost. A bearing set costs far less than a regrind and is nothing compared with a complete engine rebuild. It is the cheapest part of the rotating assembly, yet the one whose failure is most expensive.
