The 4.0 is one of AMC's best-known engines. It was one of four AMC engines kept in production when Chrysler bought AMC in 1987 as it is known for its longevity. The inline 6 is also one of Promar's most popular engines.

Promar Engine's quality control is second to none. Promar does not build their engines on an assembly line. We have 1 highly trained technician build your engine from start to finish. Every engine is tested and inspected by 2 people before it leaves our facility. All of our engines are built to meet or exceed the original OEM specifications and are backed by our industry leading 3-year/unlimited mileage warranty.

Promar takes every step necessary to supply the best rebuilt/remanufactured engine available. Some of these steps include:

  • All machine work is performed on fully CNC machines.
  • Installing new Melling Oil Pump
  • Installing new hypereutectic graphite coated pistons & piston rings
  • These blocks are magnifluxed, resurfaced, bored (.030 oversized) and diamond honed in our Rottler CNC honing machine.
  • Cylinders are held to tolerances of .0001" (roundness & taper)
  • Crankshafts are ground and micro-polished, connecting rods are reconditioned, and cylinder heads are reconditioned receiving a 3 angle valve job.
  • New rod & main bearings
  • New timing chain & gears.
  • We supply all remaining gaskets to complete the installation.
  • We also offer a new improved cylinder head casting as well as the popular TUPY casting upon request

Lastly, Promar offers free round-trip shipping to commercial locations within the continental 48 states. We do not require a core deposit, but we do require your engine core to be returned within 30 days to validate your warranty. For pricing please use the Engine Search tools above or call us toll free @ 1-800-422-6022.

Jeep 4.0 Engine

Fits the following vehicles

1981 American Motors Concord Base 4.2 Engine
1981 American Motors Concord DL 4.2 Engine
1981 American Motors Concord Limited 4.2 Engine
1981 American Motors Eagle Base 4.2 Engine
1981 American Motors Eagle DL Kammback 4.2 Engine
1981 American Motors Eagle DL SX4 4.2 Engine
1981 American Motors Eagle Kammback 4.2 Engine
1981 American Motors Eagle Limited 4.2 Engine
1981 American Motors Eagle SX4 4.2 Engine
1981 American Motors Spirit Base 4.2 Engine
1981 American Motors Spirit DL 4.2 Engine
1981 Jeep Cherokee Base 4.2 Engine
1981 Jeep Cherokee Chief 4.2 Engine
1981 Jeep CJ5 Base 4.2 Engine
1981 Jeep CJ5 Laredo 4.2 Engine
1981 Jeep CJ5 Renegade 4.2 Engine
1981 Jeep CJ7 Base 4.2 Engine
1981 Jeep CJ7 Laredo 4.2 Engine
1981 Jeep CJ7 Renegade 4.2 Engine
1981 Jeep J10 Base 4.2 Engine
1981 Jeep Scrambler Base 4.2 Engine
1981 Jeep Wagoneer Base 4.2 Engine
1981 Jeep Wagoneer Limited 4.2 Engine
1982 American Motors Concord Base 4.2 Engine
1982 American Motors Concord DL 4.2 Engine
1982 American Motors Concord Limited 4.2 Engine
1982 American Motors Eagle Base 4.2 Engine
1982 American Motors Eagle DL Kammback 4.2 Engine
1982 American Motors Eagle DL SX4 4.2 Engine
1982 American Motors Eagle Kammback 4.2 Engine
1982 American Motors Eagle Limited 4.2 Engine
1982 American Motors Eagle SX4 4.2 Engine
1982 American Motors Spirit Base 4.2 Engine
1982 American Motors Spirit DL 4.2 Engine
1982 Jeep Cherokee Base 4.2 Engine
1982 Jeep Cherokee Chief 4.2 Engine
1982 Jeep CJ5 Base 4.2 Engine
1982 Jeep CJ5 Laredo 4.2 Engine
1982 Jeep CJ5 Limited 4.2 Engine
1982 Jeep CJ5 Renegade 4.2 Engine
1982 Jeep CJ7 Base 4.2 Engine
1982 Jeep CJ7 Laredo 4.2 Engine
1982 Jeep CJ7 Limited 4.2 Engine
1982 Jeep CJ7 Renegade 4.2 Engine
1982 Jeep J10 Base 4.2 Engine
1982 Jeep Scrambler Base 4.2 Engine
1982 Jeep Scrambler SL 4.2 Engine
1982 Jeep Scrambler SR 4.2 Engine
1982 Jeep Wagoneer Base 4.2 Engine
1982 Jeep Wagoneer Brougham 4.2 Engine
1982 Jeep Wagoneer Limited 4.2 Engine
1983 American Motors Concord Base 4.2 Engine
1983 American Motors Concord DL 4.2 Engine
1983 American Motors Concord Limited 4.2 Engine
1983 American Motors Eagle Base 4.2 Engine
1983 American Motors Eagle DL SX4 4.2 Engine
1983 American Motors Eagle Limited 4.2 Engine
1983 American Motors Eagle SX4 4.2 Engine
1983 American Motors Spirit DL 4.2 Engine
1983 American Motors Spirit GT 4.2 Engine
1983 Jeep Cherokee Base 4.2 Engine
1983 Jeep Cherokee Chief 4.2 Engine
1983 Jeep Cherokee Pioneer 4.2 Engine
1983 Jeep CJ5 Base 4.2 Engine
1983 Jeep CJ5 Laredo 4.2 Engine
1983 Jeep CJ5 Limited 4.2 Engine
1983 Jeep CJ5 Renegade 4.2 Engine
1983 Jeep CJ7 Base 4.2 Engine
1983 Jeep CJ7 Laredo 4.2 Engine
1983 Jeep CJ7 Limited 4.2 Engine
1983 Jeep CJ7 Renegade 4.2 Engine
1983 Jeep J10 Base 4.2 Engine
1983 Jeep Scrambler Base 4.2 Engine
1983 Jeep Scrambler SL 4.2 Engine
1983 Jeep Scrambler SR 4.2 Engine
1983 Jeep Wagoneer Brougham 4.2 Engine
1983 Jeep Wagoneer Limited 4.2 Engine
1984 American Motors Eagle Base 4.2 Engine
1984 American Motors Eagle Limited 4.2 Engine
1984 Jeep CJ7 Base 4.2 Engine
1984 Jeep CJ7 Renegade 4.2 Engine
1984 Jeep Grand Wagoneer Base 4.2 Engine
1984 Jeep Grand Wagoneer Limited 4.2 Engine
1984 Jeep J10 Base 4.2 Engine
1984 Jeep Scrambler Base 4.2 Engine
1984 Jeep Scrambler SR 4.2 Engine
1985 American Motors Eagle Base 4.2 Engine
1985 American Motors Eagle Limited 4.2 Engine
1985 Jeep CJ7 Base 4.2 Engine
1985 Jeep CJ7 Laredo 4.2 Engine
1985 Jeep CJ7 Renegade 4.2 Engine
1985 Jeep Grand Wagoneer Base 4.2 Engine
1985 Jeep Grand Wagoneer Limited 4.2 Engine
1985 Jeep J10 Base 4.2 Engine
1985 Jeep Scrambler Base 4.2 Engine
1985 Jeep Scrambler Laredo 4.2 Engine
1985 Jeep Scrambler Renegade 4.2 Engine
1986 American Motors Eagle Base 4.2 Engine
1986 American Motors Eagle Limited 4.2 Engine
1986 Jeep CJ7 Base 4.2 Engine
1986 Jeep CJ7 Laredo 4.2 Engine
1986 Jeep CJ7 Renegade 4.2 Engine
1986 Jeep Grand Wagoneer Base 4.2 Engine
1986 Jeep J10 Base 4.2 Engine
1987 American Motors Eagle Base 4.2 Engine
1987 American Motors Eagle Limited 4.2 Engine
1987 Jeep Cherokee Base 4.0 Engine
1987 Jeep Cherokee Chief 4.0 Engine
1987 Jeep Cherokee Laredo 4.0 Engine
1987 Jeep Cherokee Limited 4.0 Engine
1987 Jeep Cherokee Pioneer 4.0 Engine
1987 Jeep Comanche Base 4.0 Engine
1987 Jeep Comanche Chief 4.0 Engine
1987 Jeep Comanche Laredo 4.0 Engine
1987 Jeep Comanche Pioneer 4.0 Engine
1987 Jeep J10 Base 4.2 Engine
1987 Jeep Wagoneer Base 4.0 Engine
1987 Jeep Wagoneer Limited 4.0 Engine
1987 Jeep Wrangler Base 4.2 Engine
1987 Jeep Wrangler Laredo 4.2 Engine
1987 Jeep Wrangler Sport 4.2 Engine
1988 American Motors Eagle Base 4.2 Engine
1988 Jeep Cherokee Base 4.0 Engine
1988 Jeep Cherokee Chief 4.0 Engine
1988 Jeep Cherokee Laredo 4.0 Engine
1988 Jeep Cherokee Limited 4.0 Engine
1988 Jeep Cherokee Pioneer 4.0 Engine
1988 Jeep Comanche Base 4.0 Engine
1988 Jeep Comanche Chief 4.0 Engine
1988 Jeep Comanche Eliminator 4.0 Engine
1988 Jeep Comanche Laredo 4.0 Engine
1988 Jeep Comanche Pioneer 4.0 Engine
1988 Jeep Wagoneer Limited 4.0 Engine
1988 Jeep Wrangler Base 4.2 Engine
1988 Jeep Wrangler Islander 4.2 Engine
1988 Jeep Wrangler Laredo 4.2 Engine
1988 Jeep Wrangler S 4.2 Engine
1988 Jeep Wrangler Sahara 4.2 Engine
1988 Jeep Wrangler Sport 4.2 Engine
1989 Jeep Cherokee Base 4.0 Engine
1989 Jeep Cherokee Laredo 4.0 Engine
1989 Jeep Cherokee Limited 4.0 Engine
1989 Jeep Cherokee Pioneer 4.0 Engine
1989 Jeep Cherokee Sport 4.0 Engine
1989 Jeep Comanche Base 4.0 Engine
1989 Jeep Comanche Eliminator 4.0 Engine
1989 Jeep Comanche Pioneer 4.0 Engine
1989 Jeep Wagoneer Limited 4.0 Engine
1989 Jeep Wrangler Base 4.2 Engine
1989 Jeep Wrangler Islander 4.2 Engine
1989 Jeep Wrangler Laredo 4.2 Engine
1989 Jeep Wrangler Sahara 4.2 Engine
1990 Jeep Cherokee Base 4.0 Engine
1990 Jeep Cherokee Laredo 4.0 Engine
1990 Jeep Cherokee Limited 4.0 Engine
1990 Jeep Cherokee Pioneer 4.0 Engine
1990 Jeep Cherokee Sport 4.0 Engine
1990 Jeep Comanche Base 4.0 Engine
1990 Jeep Comanche Eliminator 4.0 Engine
1990 Jeep Comanche Pioneer 4.0 Engine
1990 Jeep Wagoneer Limited 4.0 Engine
1990 Jeep Wrangler Base 4.2 Engine
1990 Jeep Wrangler Islander 4.2 Engine
1990 Jeep Wrangler Laredo 4.2 Engine
1990 Jeep Wrangler Sahara 4.2 Engine
1991 Jeep Cherokee Base 4.0 Engine
1991 Jeep Cherokee Briarwood 4.0 Engine
1991 Jeep Cherokee Laredo 4.0 Engine
1991 Jeep Cherokee Limited 4.0 Engine
1991 Jeep Cherokee Sport 4.0 Engine
1991 Jeep Comanche Base 4.0 Engine
1991 Jeep Comanche Eliminator 4.0 Engine
1991 Jeep Comanche Pioneer 4.0 Engine
1991 Jeep Wrangler Base 4.0 Engine
1991 Jeep Wrangler Islander 4.0 Engine
1991 Jeep Wrangler Laredo 4.0 Engine
1991 Jeep Wrangler Limited 4.0 Engine
1991 Jeep Wrangler Renegade 4.0 Engine
1991 Jeep Wrangler Sahara 4.0 Engine
1992 Jeep Cherokee Base 4.0 Engine
1992 Jeep Cherokee Briarwood 4.0 Engine
1992 Jeep Cherokee Laredo 4.0 Engine
1992 Jeep Cherokee Limited 4.0 Engine
1992 Jeep Cherokee Sport 4.0 Engine
1992 Jeep Comanche Base 4.0 Engine
1992 Jeep Comanche Eliminator 4.0 Engine
1992 Jeep Comanche Pioneer 4.0 Engine
1992 Jeep Wrangler Base 4.0 Engine
1992 Jeep Wrangler Islander 4.0 Engine
1992 Jeep Wrangler Renegade 4.0 Engine
1992 Jeep Wrangler S 4.0 Engine
1992 Jeep Wrangler Sahara 4.0 Engine
1993 Jeep Cherokee Base 4.0 Engine
1993 Jeep Cherokee Country 4.0 Engine
1993 Jeep Cherokee Sport 4.0 Engine
1993 Jeep Grand Cherokee Base 4.0 Engine
1993 Jeep Grand Cherokee Laredo 4.0 Engine
1993 Jeep Grand Cherokee Limited 4.0 Engine
1993 Jeep Wrangler Base 4.0 Engine
1993 Jeep Wrangler Islander 4.0 Engine
1993 Jeep Wrangler Renegade 4.0 Engine
1993 Jeep Wrangler Sahara 4.0 Engine
1994 Jeep Cherokee Country 4.0 Engine
1994 Jeep Cherokee SE 4.0 Engine
1994 Jeep Cherokee Sport 4.0 Engine
1994 Jeep Grand Cherokee Laredo 4.0 Engine
1994 Jeep Grand Cherokee Limited 4.0 Engine
1994 Jeep Grand Cherokee SE 4.0 Engine
1994 Jeep Wrangler Renegade 4.0 Engine
1994 Jeep Wrangler Sahara 4.0 Engine
1994 Jeep Wrangler SE 4.0 Engine
1995 Jeep Cherokee Country 4.0 Engine
1995 Jeep Cherokee SE 4.0 Engine
1995 Jeep Cherokee Sport 4.0 Engine
1995 Jeep Grand Cherokee Laredo 4.0 Engine
1995 Jeep Grand Cherokee Limited 4.0 Engine
1995 Jeep Grand Cherokee Orvis 4.0 Engine
1995 Jeep Grand Cherokee SE 4.0 Engine
1995 Jeep Wrangler Sahara 4.0 Engine
1995 Jeep Wrangler SE 4.0 Engine
1996 Jeep Cherokee Classic 4.0 Engine
1996 Jeep Cherokee Country 4.0 Engine
1996 Jeep Cherokee SE 4.0 Engine
1996 Jeep Cherokee Sport 4.0 Engine
1996 Jeep Grand Cherokee Laredo 4.0 Engine
1996 Jeep Grand Cherokee Limited 4.0 Engine
1997 Jeep Cherokee Country 4.0 Engine
1997 Jeep Cherokee SE 4.0 Engine
1997 Jeep Cherokee Sport 4.0 Engine
1997 Jeep Grand Cherokee Laredo 4.0 Engine
1997 Jeep Grand Cherokee Limited 4.0 Engine
1997 Jeep Grand Cherokee Orvis 4.0 Engine
1997 Jeep Grand Cherokee TSi 4.0 Engine
1997 Jeep TJ Sahara 4.0 Engine
1997 Jeep TJ Sport 4.0 Engine
1997 Jeep Wrangler Sahara 4.0 Engine
1997 Jeep Wrangler Sport 4.0 Engine
1998 Jeep Cherokee Classic 4.0 Engine
1998 Jeep Cherokee Limited 4.0 Engine
1998 Jeep Cherokee SE 4.0 Engine
1998 Jeep Cherokee Sport 4.0 Engine
1998 Jeep Grand Cherokee Laredo 4.0 Engine
1998 Jeep Grand Cherokee Limited 4.0 Engine
1998 Jeep Grand Cherokee TSi 4.0 Engine
1998 Jeep TJ Sahara 4.0 Engine
1998 Jeep TJ Sport 4.0 Engine
1998 Jeep Wrangler Sahara 4.0 Engine
1998 Jeep Wrangler SE 4.0 Engine
1998 Jeep Wrangler Sport 4.0 Engine
1999 Jeep Cherokee Classic 4.0 Engine
1999 Jeep Cherokee Limited 4.0 Engine
1999 Jeep Cherokee SE 4.0 Engine
1999 Jeep Cherokee Sport 4.0 Engine
1999 Jeep Grand Cherokee Laredo 4.0 Engine
1999 Jeep Grand Cherokee Limited 4.0 Engine
1999 Jeep TJ Sahara 4.0 Engine
1999 Jeep TJ Sport 4.0 Engine
1999 Jeep Wrangler Sahara 4.0 Engine
1999 Jeep Wrangler SE 4.0 Engine
1999 Jeep Wrangler Sport 4.0 Engine
2000 Jeep Cherokee Classic 4.0 Engine
2000 Jeep Cherokee Limited 4.0 Engine
2000 Jeep Cherokee SE 4.0 Engine
2000 Jeep Cherokee Sport 4.0 Engine
2000 Jeep Grand Cherokee Laredo 4.0 Engine
2000 Jeep Grand Cherokee Limited 4.0 Engine
2000 Jeep TJ Sahara 4.0 Engine
2000 Jeep TJ Sport 4.0 Engine
2000 Jeep Wrangler Sahara 4.0 Engine
2000 Jeep Wrangler SE 4.0 Engine
2000 Jeep Wrangler Sport 4.0 Engine
2001 Jeep Cherokee Classic 4.0 Engine
2001 Jeep Cherokee Limited 4.0 Engine
2001 Jeep Cherokee SE 4.0 Engine
2001 Jeep Cherokee Sport 4.0 Engine
2001 Jeep Grand Cherokee Laredo 4.0 Engine
2001 Jeep Grand Cherokee Limited 4.0 Engine
2001 Jeep TJ Sahara 4.0 Engine
2001 Jeep TJ Sport 4.0 Engine
2001 Jeep Wrangler Sahara 4.0 Engine
2001 Jeep Wrangler SE 4.0 Engine
2001 Jeep Wrangler Sport 4.0 Engine
2002 Jeep Grand Cherokee Laredo 4.0 Engine
2002 Jeep Grand Cherokee Limited 4.0 Engine
2002 Jeep Grand Cherokee Sport 4.0 Engine
2002 Jeep TJ Sahara 4.0 Engine
2002 Jeep TJ Sport 4.0 Engine
2002 Jeep Wrangler Sahara 4.0 Engine
2002 Jeep Wrangler Sport 4.0 Engine
2002 Jeep Wrangler X 4.0 Engine
2003 Jeep Grand Cherokee Laredo 4.0 Engine
2003 Jeep Grand Cherokee Limited 4.0 Engine
2003 Jeep TJ Rubicon 4.0 Engine
2003 Jeep TJ Sahara 4.0 Engine
2003 Jeep TJ Sport 4.0 Engine
2003 Jeep Wrangler Rubicon 4.0 Engine
2003 Jeep Wrangler Sahara 4.0 Engine
2003 Jeep Wrangler Sport 4.0 Engine
2003 Jeep Wrangler X 4.0 Engine
2004 Jeep Grand Cherokee Laredo 4.0 Engine
2004 Jeep Grand Cherokee Limited 4.0 Engine
2004 Jeep Grand Cherokee Special Edition 4.0 Engine
2004 Jeep TJ Rubicon 4.0 Engine
2004 Jeep TJ Sahara 4.0 Engine
2004 Jeep TJ Sport 4.0 Engine
2004 Jeep Wrangler Rubicon 4.0 Engine
2004 Jeep Wrangler Sahara 4.0 Engine
2004 Jeep Wrangler Sport 4.0 Engine
2004 Jeep Wrangler Unlimited 4.0 Engine
2004 Jeep Wrangler X 4.0 Engine
2005 Jeep TJ Rubicon 4.0 Engine
2005 Jeep TJ Sport 4.0 Engine
2005 Jeep Wrangler Rubicon 4.0 Engine
2005 Jeep Wrangler Sport 4.0 Engine
2005 Jeep Wrangler Unlimited 4.0 Engine
2005 Jeep Wrangler Unlimited Rubicon 4.0 Engine
2005 Jeep Wrangler X 4.0 Engine
2006 Jeep TJ Rubicon 4.0 Engine
2006 Jeep TJ Sport 4.0 Engine
2006 Jeep Wrangler 65th Anniversary Edition 4.0 Engine
2006 Jeep Wrangler Rubicon 4.0 Engine
2006 Jeep Wrangler SE 4.0 Engine
2006 Jeep Wrangler Sport 4.0 Engine
2006 Jeep Wrangler Unlimited 4.0 Engine
2006 Jeep Wrangler Unlimited Rubicon 4.0 Engine
2006 Jeep Wrangler X 4.0 Engine