ACL 5M1695HX-STD Race Main Bearing STD +0.001" Toyota 4AGE 4AGZE AE86 MR2 AW11

Vehicle Fitment

• 1983-1987 Toyota Corolla Levin (AE86) - 4A-GE 1.6L DOHC 16v (RWD)
• 1983-1987 Toyota Sprinter Trueno (AE86, JDM) - 4A-GE 1.6L DOHC 16v (RWD)
• 1984-1989 Toyota MR2 (AW11) - 4A-GE 1.6L DOHC 16v (Mid-Engine RWD)
• 1987-1993 Toyota Corolla (AE92) - 4A-GE 1.6L DOHC 16v; 4A-GZE 1.6L DOHC 16v Supercharged
• 1987-1992 Toyota Sprinter Trueno (AE92, JDM) - 4A-GZE 1.6L Supercharged variant
• 1995-1998 Toyota Corolla Levin / Sprinter Trueno (AE111) - 4A-GE 1.6L 20v Black Top
• 1990-1992 Geo Prizm GSi - 4A-GE (based on AE92 Corolla platform)
• Various Toyota Corolla, Corona, Sprinter with 2A, 3A, 5A, 7A engines sharing the same main journal dimensions

Fitment Notes

• The HX designation indicates extra oil clearance: the bearing wall is approximately 0.013mm thinner per shell compared to the standard 5M1695H-STD set, providing approximately 0.025mm (0.001") of additional running clearance at standard crankshaft journal diameter - without any crankshaft grinding.
• The HX variant is well suited to high-revving 4A-GE builds - particularly supercharged 4A-GZE applications and heavily modified naturally aspirated engines where a more liberal main journal clearance is desired for improved oil film protection at sustained high RPM.
• For standard oil clearance at stock journal diameter, use 5M1695H-STD. For reground crankshafts, use the appropriate oversize H set: 5M1695H-.025 (+0.025mm), 5M1695H-.25 (+0.25mm), or 5M1695H-.50 (+0.50mm).
• This set covers the Toyota A-series inline-4 engine family - all variants from the 2A through 7A share the same crankshaft main journal dimensions, making a single bearing set applicable across the entire lineup.
• Always confirm actual running clearance with Plastigage or a dial bore gauge after assembly - do not rely solely on bearing size designation.
• Sold as a complete set of 10 bearing shells (5 pairs, upper and lower) - sufficient for all 5 main journal positions in one 4-cylinder engine.

Features

• Tri-metal construction: copper-lead alloy lining bonded over a hardened steel backing, with a high-strength overlay plate - engineered for the high-RPM demands of naturally aspirated and supercharged 4A-GE / 4A-GZE builds routinely revved beyond 8,000 rpm.
• HX extra-clearance wall thickness provides approximately 0.025mm (0.001") of additional oil clearance versus the H-STD set, increasing oil film volume at the main journals for improved lubrication under extreme sustained RPM load.
• Hardened steel backing on all main bearings improves structural support of the bearing lining and maintains crush under the sustained high-RPM loads characteristic of 4A-GE performance applications.
• High-strength overlay plate with reduced thickness provides improved fatigue resistance compared to OEM-spec bearings - an essential upgrade for any 4A-GE or 4A-GZE rebuild targeting performance longevity.
• Increased bearing crush and tighter wall tolerances ensure consistent, secure seating in the block main journal bores, reducing the risk of bearing movement.
• Enlarged ID chamfers on bearing edges accommodate the larger fillet radii found on performance and aftermarket Toyota A-series crankshafts.
• 3/4-groove upper main bearings optimize oil supply to the main journals and to the connecting rod bearings through the crankshaft oiling passages.
• Elimination of flash plating on bearing backs improves heat transfer and maximizes grip between the bearing shell and the block main bore.
• Increased eccentricity compensates for bore distortion at high RPM and assists in the formation of a stable hydrodynamic oil film under load.

Specifications

• Part Number: 5M1695HX-STD
• Product Line: ACL Race Series
• Application: Crankshaft Main Bearings
• Engine Compatibility: Toyota A-series Inline-4 - 4A-GE (1587cc DOHC 16v/20v), 4A-GZE (1587cc DOHC 16v Supercharged), and all 2A/3A/4A/5A/7A variants sharing the same main journal dimensions
• Crankshaft Size: Standard (STD - Unground)
• Oil Clearance Designation: HX - Extra +0.025mm (+0.001") clearance vs. H-STD
• Shaft (Main Journal) Diameter: 47.985-48.000mm (1.8892-1.8898 in)
• Tunnel (Housing Bore): 52.020-52.050mm (2.0480-2.0492 in)
• Maximum Wall Thickness at Crown: approx. 1.988mm (0.0783 in)
• Maximum Overall Length: 19.9mm (0.783 in)
• Bearing Material: Tri-Metal Copper-Lead Alloy / Hardened Steel Backing
• Quantity: Set of 10 Shells - 5 Upper + 5 Lower (complete engine set)

Included Components

• 10x Race Series Crankshaft Main Bearing Shells - Standard Size, Extra Oil Clearance (HX) (5 upper, 5 lower)

Product Description

The ACL Race Series 5M1695HX-STD crankshaft main bearing set is the extra-clearance performance option for Toyota's A-series inline-4 engine family - covering the iconic 4A-GE and supercharged 4A-GZE engines that powered the AE86 Corolla Levin/Sprinter Trueno, the first-generation AW11 MR2, and the AE92 Corolla through multiple generations. Sharing the same standard main journal diameter as the 5M1695H-STD, the HX variant uses a slightly thinner wall (~0.013mm per shell) to deliver approximately 0.025mm (0.001") of additional running oil clearance without any crankshaft modification.

The extra clearance is particularly valued in high-revving 4A-GE builds - engines built to operate consistently at 8,000 rpm and above benefit from a slightly thicker oil film at the main journals, reducing heat buildup and improving hydrodynamic lubrication stability. All Toyota A-series engines share identical crankshaft main journal dimensions, making this set applicable across the full 2A through 7A family at standard crankshaft size. Always confirm actual running clearance at assembly. Sold as a complete set of 10 shells for one engine.