ACL 5M1644H-0.25 High-Performance Main Bearing Set for VW/Audi 1781cc and 1984cc Engines

This Main Bearing Set include 6 bearings with oil grooves and 4 without. The #4 journal will receive the oil groove on both sides of the journal, the rest have a grooved bearing on the block side only. See shell diagrams showing #4

The ACL 5M1644H-0.25 High-Performance Main Bearing Set is designed for Volkswagen and Audi 1781cc and 1984cc engines requiring main bearings with a 0.25 mm oversize fit. This set includes six bearings with oil grooves and four without, providing the correct oiling configuration for the application. The number four journal receives an oil-grooved bearing on both sides, while the remaining journals use a grooved bearing on the block side only.

Manufactured for demanding engine-building applications, these ACL main bearings support reliable crankshaft operation and consistent oil distribution. The precision-engineered bearing shells are intended for proper installation with a crankshaft and block machined to the specified oversize requirement. Always verify crankshaft journal measurements, bearing clearances, and shell orientation before assembly. Refer to the applicable shell diagrams to confirm the number four journal arrangement and installation position.

Key Product Specifications & Technical Data

• Brand: ACL
• Part Number: 5M1644H-0.25
• Product Type: Main bearing set
• Engine Application: Volkswagen and Audi 1781cc and 1984cc engines
• Bearing Size: 0.25 mm oversize, approximately 0.010 inch
• Bearing Configuration: Six grooved bearings and four nongrooved bearings
• Number Four Journal: Oil grooves on both sides of the journal
• Remaining Journals: Grooved bearing positioned on the block side

What's Included

• One ACL 5M1644H-0.25 main bearing set
• Six oil-grooved bearing shells
• Four nongrooved bearing shells

Fitment

Fits select 1984-1987 Audi 4000, 1988-1990 Audi 80, 1988-1989 Audi 90, and 1997-1998 Audi A4 models. Confirm engine displacement, crankshaft specifications, and required bearing size before ordering.

Features:

• High-Performance Main Bearings: ACL 5M1644H-0.25 bearings are engineered for Volkswagen and Audi 1781cc and 1984cc engine applications.
• 0.25 mm Oversize Fit: Designed for crankshafts machined to accept approximately 0.010-inch oversize main bearings.
• Correct Oil Groove Arrangement: Includes six grooved bearings and four nongrooved bearings for the specified engine oiling configuration.
• Application-Specific Journal Coverage: The number four journal receives oil grooves on both sides, while the remaining journals use a grooved bearing on the block side.

Fitments:
1983 Volkswagen Rabbit GTI
1984 Audi 4000 S
1984 Volkswagen Jetta Base
1984 Volkswagen Jetta GL
1984 Volkswagen Jetta GLI
1984 Volkswagen Quantum GL
1984 Volkswagen Rabbit GL
1984 Volkswagen Rabbit GTI
1984 Volkswagen Rabbit Wolfsburg Edition
1984 Volkswagen Rabbit Convertible Base
1984 Volkswagen Rabbit Convertible Wolfsburg Edition
1984 Volkswagen Scirocco Base
1985 Audi 4000 S
1985 Volkswagen Cabriolet Base
1985 Volkswagen Golf Base
1985 Volkswagen Golf GTI
1985 Volkswagen Jetta Base
1985 Volkswagen Jetta GL
1985 Volkswagen Jetta GLI
1985 Volkswagen Quantum Base
1985 Volkswagen Quantum GL
1985 Volkswagen Scirocco Base
1986 Audi 4000 S
1986 Volkswagen Cabriolet Base
1986 Volkswagen Golf Base
1986 Volkswagen Golf GTI
1986 Volkswagen Jetta Base
1986 Volkswagen Jetta GL
1986 Volkswagen Jetta GLI
1986 Volkswagen Scirocco 16-Valve
1986 Volkswagen Scirocco Base
1987 Audi 4000 S
1987 Volkswagen Cabriolet Base
1987 Volkswagen Cabriolet Wolfsburg Edition
1987 Volkswagen Fox Base
1987 Volkswagen Fox GL
1987 Volkswagen Golf GL
1987 Volkswagen Golf GT
1987 Volkswagen Golf GTI
1987 Volkswagen Golf GTI 16-Valve
1987 Volkswagen Jetta Base
1987 Volkswagen Jetta GL
1987 Volkswagen Jetta GLI
1987 Volkswagen Jetta GLI 16-Valve
1987 Volkswagen Jetta Wolfsburg Edition
1987 Volkswagen Scirocco 16-Valve
1987 Volkswagen Scirocco Base
1988 Audi 80 Base
1988 Audi 90 Base
1988 Volkswagen Cabriolet Base
1988 Volkswagen Cabriolet Bestseller
1988 Volkswagen Cabriolet Boutique
1988 Volkswagen Fox Base
1988 Volkswagen Fox GL
1988 Volkswagen Golf Base
1988 Volkswagen Golf GL
1988 Volkswagen Golf GT
1988 Volkswagen Golf GTI 16-Valve
1988 Volkswagen Jetta Base
1988 Volkswagen Jetta Carat
1988 Volkswagen Jetta GL
1988 Volkswagen Jetta GLI 16-Valve
1988 Volkswagen Scirocco 16-Valve
1989 Audi 80 Base
1989 Volkswagen Cabriolet Base
1989 Volkswagen Cabriolet Bestseller
1989 Volkswagen Cabriolet Boutique
1989 Volkswagen Cabriolet Wolfsburg Edition
1989 Volkswagen Fox Base
1989 Volkswagen Fox GL
1989 Volkswagen Fox GL Sport
1989 Volkswagen Golf Base
1989 Volkswagen Golf GL
1989 Volkswagen Golf GTI 16-Valve
1989 Volkswagen Jetta Base
1989 Volkswagen Jetta Carat
1989 Volkswagen Jetta GL
1989 Volkswagen Jetta GLI 16-Valve
1990 Audi 80 Base
1990 Volkswagen Cabriolet Base
1990 Volkswagen Cabriolet Bestseller
1990 Volkswagen Cabriolet Boutique
1990 Volkswagen Corrado G60
1990 Volkswagen Fox Base
1990 Volkswagen Fox GL
1990 Volkswagen Fox GL Sport
1990 Volkswagen Golf GL
1990 Volkswagen Golf GTI 16-Valve
1990 Volkswagen Golf GTI 8-Valve
1990 Volkswagen Jetta Carat
1990 Volkswagen Jetta GL
1990 Volkswagen Jetta GLI 16-Valve
1990 Volkswagen Passat GL
1991 Volkswagen Cabriolet Base
1991 Volkswagen Cabriolet Carat
1991 Volkswagen Cabriolet Etienne Aigner
1991 Volkswagen Corrado G60
1991 Volkswagen Fox Base
1991 Volkswagen Fox GL
1991 Volkswagen Golf GL
1991 Volkswagen Golf GTI 16-Valve
1991 Volkswagen Golf GTI 8-Valve
1991 Volkswagen Jetta Carat
1991 Volkswagen Jetta GL
1991 Volkswagen Jetta GLI 16-Valve
1991 Volkswagen Passat GL
1992 Volkswagen Cabriolet Base
1992 Volkswagen Cabriolet Carat
1992 Volkswagen Cabriolet Classic
1992 Volkswagen Cabriolet Wolfsburg Edition
1992 Volkswagen Corrado G60
1992 Volkswagen Fox Base
1992 Volkswagen Fox GL
1992 Volkswagen Golf GL
1992 Volkswagen Golf GTI 16-Valve
1992 Volkswagen Golf GTI 8-Valve
1992 Volkswagen Jetta Carat
1992 Volkswagen Jetta GL
1992 Volkswagen Jetta GLI 16-Valve
1992 Volkswagen Passat CL
1992 Volkswagen Passat GL
1993 Volkswagen Cabriolet Base
1993 Volkswagen Cabriolet Classic
1993 Volkswagen Fox Base
1993 Volkswagen Fox GL
1993 Volkswagen Golf GL
1993 Volkswagen Jetta GL
1993 Volkswagen Passat GL
1994 Volkswagen Golf GL
1994 Volkswagen Golf GTI
1994 Volkswagen Golf Limited Edition
1994 Volkswagen Jetta GL
1994 Volkswagen Jetta GLS
1994 Volkswagen Jetta Limited Edition
1995 Volkswagen Cabrio Base
1995 Volkswagen Golf Celebration Edition
1995 Volkswagen Golf City
1995 Volkswagen Golf GL
1995 Volkswagen Golf Sport
1995 Volkswagen Jetta Celebration Edition
1995 Volkswagen Jetta City
1995 Volkswagen Jetta GL
1995 Volkswagen Jetta GLS
1995 Volkswagen Passat GLS
1996 Volkswagen Cabrio Base
1996 Volkswagen Golf GL
1996 Volkswagen Golf GTI
1996 Volkswagen Jetta GL
1996 Volkswagen Jetta GLS
1996 Volkswagen Jetta Trek
1996 Volkswagen Jetta Wolfsburg Edition
1996 Volkswagen Passat GLS
1996 Volkswagen Passat TDI
1997 Audi A4 Base
1997 Audi A4 Quattro Base
1997 Volkswagen Cabrio Base
1997 Volkswagen Cabrio High Line
1997 Volkswagen Golf GL
1997 Volkswagen Golf GTI
1997 Volkswagen Golf Jazz
1997 Volkswagen Golf K2
1997 Volkswagen Golf Trek
1997 Volkswagen Jetta GL
1997 Volkswagen Jetta GLS
1997 Volkswagen Jetta GT
1997 Volkswagen Jetta Jazz
1997 Volkswagen Jetta TDI
1997 Volkswagen Passat TDI
1998 Audi A4 Base
1998 Audi A4 Quattro Base
1998 Volkswagen Beetle Base
1998 Volkswagen Beetle TDI
1998 Volkswagen Cabrio Base
1998 Volkswagen Cabrio GL
1998 Volkswagen Cabrio GLS
1998 Volkswagen Golf GL
1998 Volkswagen Golf GTI
1998 Volkswagen Golf K2
1998 Volkswagen Jetta GL
1998 Volkswagen Jetta GLS
1998 Volkswagen Jetta GT
1998 Volkswagen Jetta K2
1998 Volkswagen Jetta TDI
1998 Volkswagen Jetta Wolfsburg Edition
1998 Volkswagen Passat GLS
1999 Audi A4 Base
1999 Audi A4 Quattro Avant
1999 Audi A4 Quattro Base
1999 Volkswagen Beetle GL
1999 Volkswagen Beetle GLS
1999 Volkswagen Beetle GLX
1999 Volkswagen Golf GL
1999 Volkswagen Golf GLS
1999 Volkswagen Golf GTI
1999 Volkswagen Golf TDI
1999 Volkswagen Golf Wolfsburg Edition
1999 Volkswagen Jetta GL
1999 Volkswagen Jetta GLS
1999 Volkswagen Jetta TDI
1999 Volkswagen Jetta Wolfsburg Edition
1999 Volkswagen Passat GLS
2000 Audi A4 Base
2000 Audi A4 Quattro Avant
2000 Audi A4 Quattro Base
2000 Audi TT Base
2000 Audi TT Quattro Base
2000 Volkswagen Beetle GL
2000 Volkswagen Beetle GLS
2000 Volkswagen Beetle GLX
2000 Volkswagen Golf GL
2000 Volkswagen Golf GLS
2000 Volkswagen Golf GTI GLS
2000 Volkswagen Jetta GL
2000 Volkswagen Jetta GLS
2000 Volkswagen Jetta TDI
2000 Volkswagen Passat GLS
2001 Audi TT Base
2001 Audi TT Quattro Base
2001 Volkswagen Beetle GL
2001 Volkswagen Beetle GLS
2001 Volkswagen Beetle GLX
2001 Volkswagen Beetle Sport
2001 Volkswagen Golf GL
2001 Volkswagen Golf GLS
2001 Volkswagen Golf GTI GLS
2001 Volkswagen Jetta GL
2001 Volkswagen Jetta GLS
2001 Volkswagen Jetta TDI
2001 Volkswagen Passat GLS
2002 Audi TT Quattro ALMS Edition
2002 Audi TT Quattro Base
2002 Volkswagen Beetle GL
2002 Volkswagen Beetle GLS
2002 Volkswagen Beetle Sport
2002 Volkswagen Golf GL
2002 Volkswagen Golf GLS
2002 Volkswagen Jetta GL
2002 Volkswagen Jetta GLS
2002 Volkswagen Jetta TDI
2003 Volkswagen Beetle GL
2003 Volkswagen Beetle GLS
2003 Volkswagen Golf GL
2003 Volkswagen Golf GLS
2003 Volkswagen Jetta GL
2003 Volkswagen Jetta GLS
2003 Volkswagen Jetta TDI
2004 Volkswagen Beetle GL
2004 Volkswagen Beetle GLS
2004 Volkswagen Golf GL
2004 Volkswagen Golf GL TDI
2004 Volkswagen Golf GLS
2004 Volkswagen Golf GLS TDI
2004 Volkswagen Jetta GL
2004 Volkswagen Jetta GLS
2004 Volkswagen Jetta TDI
2005 Volkswagen Beetle GL
2005 Volkswagen Beetle GLS
2005 Volkswagen Golf GL
2005 Volkswagen Golf GLS
2005 Volkswagen Jetta GL
2005 Volkswagen Jetta GLS
2006 Volkswagen Golf GL
2006 Volkswagen Golf GLS
2006 Volkswagen Jetta 2.0T
2006 Volkswagen Jetta GLI
2007 Volkswagen Jetta 2.0T
2007 Volkswagen Jetta GLI
2008 Volkswagen Jetta GLI
2008 Volkswagen Jetta Wolfsburg Edition
2009 Volkswagen Jetta GLI
2009 Volkswagen Jetta SEL
2009 Volkswagen Jetta Wolfsburg Edition
2010 Volkswagen Jetta Wolfsburg Edition

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1