Tri-metal main bearings VAG 1.8/2.0 8V/16V 1.8T 20V

The tri-metal main bearing sets ACL RACE and KING RACING for the VAG 1.8/2.0 8V/16V and 1.8T 20V engines are made up of 10 bearing shells.

Fitment:

• 1.8 8V engines: DX, GX, HT, JH, PF, PG, RD, RV
• 1.8 16V engines: KR, PL
• 2.0 8V engine: ABA
• 2.0 16V engines: 9A, ABF
• 1.8 20V Turbo engines: AEB, AGU, AJL, AJQ, AMK, ANB, APH, APP, APU, APX, APY, AQA, AQX, ARK, ARX, ARY, ARZ, ATW, AUM, AUQ, AVC, AVJ, AWD, AWP, AWT, AWU, AWV, AYP, BAM, BBU, BEK, BEX, BFB, BFV, BJX, BKF, BNU, BVP.

PLEASE NOTE: two of the grooved bearing halves must be fitted on the 4th crank pin, counting from the timing side.

Below (click on the image) you will find the tri-metal big end bearings for the VAG 1.8/2.0 8V/16V and 1.8T 20V engines:

Technical specification

• Crankshaft main journal diameter (min/max): 53.958 / 53.978mm
• Main bearing bore diameter (min/max): 59.000 / 59.019mm
• Max thickness: 2.502mm
• Size(s): standard, or standard with HX clearance, or +0.025 or +0.25 or +0.5mm
• Anti-friction coating: with or without
• References: 5M1644, 5M1644H-STD, 5M1644HX-STD, 5M1644H-.025, 5M1644H-.25, 5M1644H-.50, 5M1644HC, 5M1644HC-STD, 5M1644HXC-STD, 5M1644HC-.25

ACL Race Series tri-metal bearings are manufactured to tight tolerances. CNC machining is carried out to the micron, before metrology control of the diameters, the thickness and the width of the ACL Race Series tri-metal bearing. ACL Race Series bearings therefore give a reliable and consistent fit in your performance engine. ACL Race Series tri-metal bearings are in fact made up of 4 layers:

• SAE1010 steel on the outside
• 0.3mm copper alloy
• 0.0001mm nickel
• copper alloy from 0.013 to 0.018mm

This choice of materials, combined with the manufacturing processes, makes ACL Race Series tri-metal bearings more resistant to increases in power, in torque and in engine speed. The compression strength of ACL Race Series tri-metal bearings brings reliability to your engine even on turbocharged or supercharged builds running high boost, or on high-revving engines.

Technical specification

• Crankshaft main journal diameter (min/max): 53.96 / 53.98mm
• Main bearing bore diameter (min/max): 59.00 / 59.02mm
• Max thickness: 2.499mm
• Size(s): standard, or standard with HX clearance, or +0.25mm or +0.50mm
• Anti-friction coating: without
• References: MB5566, MB5566XP, MB5566XP STDX, MB5566XP0.25, MB5566XP0.5

Since 1960 KING RACING has designed and manufactured high performance, high quality bearings. Beyond its high performance production machinery, King Racing relies on simulation software to analyse the thermodynamics, the dynamics and the elasto-hydrodynamics of its bearings. KING RACING tri-metal bearings are produced in pMax Black, a tri-metal alloy 24% stronger than any existing tri-metal bearing.

KING RACING bearings are made up of 3 to 4 layers, depending on the application:

Outside: steel Intermediate: lead bronze Inside: babbitt with a high copper content Anti-friction coating containing lubricant and ceramic additives