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4.0L 24v - 1GR-FE
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4.0L 24v - 1GR-FE
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Set of 8 tri-metal crankshaft main bearing half shells for the four main bearings of the Toyota 1GR-FE 4.0 V6.
The 1GR-FE is the Toyota 4.0 litre V6 with twin overhead camshafts and 24 valves. It powers the Toyota Land Cruiser Prado, Land Cruiser 200, Hilux, Fortuner, 4Runner, FJ Cruiser, Tacoma and Tundra, as well as the Lexus GX. ACL offers a Race Series tri-metal main bearing set for this engine.
The crankshaft of this engine runs on four 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 trimetal bearing combines three layers with complementary roles: a steel back that provides structural strength, a copper-lead intermediate layer that takes the heavy loads and an anti-friction running layer that protects the main journal. The complete set contains 0 half shells, i.e. The complete set covers the four main bearings of the crankshaft. The upper and lower half shells are different: each goes in its own position.
An aluminium bi-metal bearing, intended for low to medium loads, tops out at around 8,000 psi; a performance trimetal bearing holds up to 12,000 psi, 50% more load capacity. It therefore gains strength and service life on turbocharged, supercharged or high-revving engines.
| ACL bearings Crankshaft journal Ø 71.988 / 72.000 mm Housing bore Ø 77.000 / 77.016 mm Width 22.4 mm |
| Reference | Brand and treatment | Size | Wall thickness (mm) |
|---|---|---|---|
| 4M8263H-STD | ACL Race - Untreated | Standard | 2.497 |
| 4M8263HX-STD | ACL Race - Untreated | Std, increased clearance (HX) | 2.484 |
| 4M8263H-.025 | ACL Race - Untreated | +0.025 | 2.5095 |
| 4M8263H-.25 | ACL Race - Untreated | +0.25 | 2.622 |
Running clearance is the space left between the bearing and the main journal, permanently filled by the oil film.
With the engine running, the main journal does not touch the bearing: it rides on this oil film, which takes the load. The clearance sets the film thickness. Too small, it restricts oil flow, raises the temperature and invites seizure; too large, it lets the oil escape, the film loses its load capacity and oil pressure falls. The right clearance combines sufficient lubrication with an oil film that keeps carrying the load.
| Size / grade | When to choose it | ACL Race Series |
|---|---|---|
| Standard (STD) | Standard journal, not reground | 0.071 to 0.085 mm |
| Increased clearance (HX) | Wider clearance: high oil flow, high rpm | 0.096 to 0.110 mm |
| +0.025 mm | Polished journal | 0.071 to 0.085 mm |
| +0.25 mm | Journal reground to 0.25 mm | 0.071 to 0.085 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 built for engine tuning and racing. They withstand far higher loads than a standard bearing and come in several sizes: the standard size, a +0.025 mm size for a main journal that has only been polished, a +0.25 mm regrind size and the HX version with increased clearance for high-revving engines or engines needing a high oil flow. This range lets you refit a reground crankshaft without changing product line and match the clearance to the oil and use chosen.
 | Founded in Australia in 1949, ACL Bearing Company designs high-performance engine bearings. Its Race Series brings together precision trimetal bearings, offered in a wide choice of sizes and fitted to built engines around the world. |
This main bearing set fits the following vehicles, by engine code:
| Brand | Model (chassis) | Engine code | Power | Years |
|---|---|---|---|---|
| LEXUS | GX (URJ15_, GRJ15_) 400 4WD | 1GR-FE | 275 hp | 2012– |
| TOYOTA | 4 RUNNER IV (_N21_) 4.0 / 4.0 EFI 4WD | 1GR-FE | 237–249 hp | 2002–2009 |
| TOYOTA | 4 RUNNER V (_N28_) 4.0 / 4.0 4WD | 1GR-FE | 249–275 hp | 2009– |
| TOYOTA | FJ CRUISER (GSJ1_) 4.0 / 4.0 4WD | 1GR-FE | 239–276 hp | 2005–2018 |
| TOYOTA | FORTUNER (_N15_, _N16_) 4.0 / 4.0 4x4 | 1GR-FE | 235–238 hp | 2015– |
| TOYOTA | FORTUNER (_N5_, _N6_) 4.0 / 4.0 4WD | 1GR-FE | 238 hp | 2005–2015 |
| TOYOTA | HILUX VII Pick-up (_N1_, _N2_, _N3_) 4.0 V6 VVTi / 4.0 V6 VVTi 4WD | 1GR-FE | 238 hp | 2005–2016 |
| TOYOTA | HILUX VIII Pick-up (_N1_) 4.0 V6 VVTi / 4.0 V6 VVTi 4WD | 1GR-FE | 238 hp | 2015– |
| TOYOTA | LAND CRUISER (_J7_, _JL7_) 4.0 4x4 | 1GR-FE | 231 hp | 2007– |
| TOYOTA | LAND CRUISER 200 (_J2_) 4.0 | 1GR-FE | 239–271 hp | 2010– |
| TOYOTA | LAND CRUISER 300 (_J3_) 4.0 4WD | 1GR-FE | 273 hp | 2021– |
| TOYOTA | LAND CRUISER PRADO (_J12_) 4.0 / 4.0 V6 VVT-i | 1GR-FE | 235–282 hp | 2002–2010 |
| TOYOTA | LAND CRUISER PRADO (_J15_) 4.0 V6 Dual VVTi / 4.0 V6 VVT / 4.0 V6 VVT-i / 4.0 V6 VVTi | 1GR-FE | 249–282 hp | 2009– |
| TOYOTA | TACOMA Pick-up (_N2_) 4.0 / 4.0 4WD | 1GR-FE | 237–238 hp | 2004–2015 |
| TOYOTA | TUNDRA Pick-up (_K3_, _K4_) 4.0 / 4.0 4WD | 1GR-FE | 239–245 hp | 2003–2006 |
| TOYOTA | TUNDRA Pick-up (_K5_, _K6_) 4.0 | 1GR-FE | 239–273 hp | 2006– |
A failing main bearing does not fail alone: it scores the main journal, sends debris through the oil circuit and calls at least for a crankshaft regrind, when it does not damage the block as well. On a built engine, a bearing set costs only a fraction of a regrind, and even less of a full rebuild: it is the cheapest part of the crankshaft assembly and the one whose failure costs the most.
