If you're restoring or repairing a Jeep CJ, YJ or TJ Wrangler vehicle, check out our high quality OEM style 4.0L 242 AMC 6 Cylinder Engine Replacement Parts.
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Jeep Parts » Jeep Replacement Parts » Jeep Engine Parts » Replacement 4.0L 242 AMC 6 Cylinder Engine Parts
4.0L 242 AMC 6 Cylinder Parts Exploded View Diagram

Item # Years Description Comments Part #
1 93/04 Valve Cover, Aluminum Black - Some modification may be needed. 51104 07
  93/04   Yellow - Some modification may be needed. 51104 09
  93/04   Red - Some modification may be needed. 51104 08
2 87/95 Gasket, Valve Cover Use RTV Silicone 52152 03
  96/04     51100 0063
3 87/02 Gasket, Cylinder Head   51100 0113
4 87/99 Gasket Set, Upper   51100 0019
4a 87/99 Head Gasket Only   51100 0113
5 87/91 Gasket Set, Lower w/ Cork & Rubber Oil Pan Set 51002 00
  92/02   w/ 1 pc. Pan Gasket 51002 51
6 87/90 Filter, Engine Oil w/ METRIC Threads 52449 0496
  91/04   w/ SAE Threads 52449 0497
7 87/90 Pump, Oil   51004 0015
  91/04     51004 0016
8 87/05 Oil Pan Less Sensor Hole 51009 02
8A 87/91 Gasket Set, Oil Pan Cork and Rubber set (4 pc.) 51002 50
  87/04   1 Piece 51002 5005
9 87/90 Cap, Oil Filler   51101 03
  91/94   w/ 2 tab attachment 51101 00
  95   w/ 2 tab attachment XJ & ZJ 51101 00
  95   w/ 1-7/32" diam. twist on threads YJ 51101 0006
10 87/91 Plug, Oil Pan Plug & Gasket, Metric threads 51009 50
  91/02   1 piece, rubber coated, 1/2"-20 51009 0054
11 87/90 Grommet   51309 0100
12 87/95 Piston & Pin (each) Standard 51015 0007
  87/95   +.010 “ 51015 0008
  96/04   Standard 51015 0000
13 87/95 Ring Set (for 6 pistons) Standard 51015 1002
  96/04   Standard 51015 1005
14 87/90 Rod, Connecting   51012 0004
15 87/04 Bolt, Connecting Rod includes nut 51012 0900
16 87/04 Main Bearing, Crankshaft Std. w/ offset tab (6 needed) 55120 0300
16A 90/04 Main Bearing Set Std. w/ centered tab 55125 0305
17 87/89 Thrust Bearing,Crankshaft Standard (1 needed) 55125 0303
  90/04   Standard ( 1 needed) 55125 0303
18 87/04 Bearing, Connecting Rod Standard ( 6 needed) 51011 0000
      .010" Undersize (6 needed) 51011 0001
19 87/04 Plug, Camshaft 2-9/64" Diameter 51001 9000
20 87/04 Plug, Oil Hole 2" Diameter 51001 9001
22 87/95 Camshaft   51001 0905
23 87/98 Bearing Set, Camshaft Set of 5 51011 0200
  87/98 Bearing Set, .010 Set of 5 - .010" Oversize 51011 0201
24 87/98 Valve, Intake, Std. With head marked “ 15 “, w/ 1 groove 51104 0904
  98/04   w/ 3 radius cut grooves (on stem) 51104 0905
25 87/98 Valve, Exhaust, Std. w/ 1 radius cut groove (on stem) 51104 0092
  98/04   w/ 3 radius cut grooves (on stem) 51104 0095
26 87/04 Seal, Valve Stem Intake 51104 9000
      Exhaust 51104 9001
27 87/98 Lock, Valve Retainer w/ 1 radius cut groove (on stem) 51104 9002
  98/04   w/ 3 radius cut grooves (on stem) 51104 9003
28 87/04 Rocker Arm   51103 0205
29 87/04 Pivot, Rocker Arm   51103 0201
30 87/04 Bridge, Rocker Arm Pivot   51104 53
31 87/04 Pivot Kit Contains 2 pivots & 1 bridge 51103 0202
32 87/04 Bolt, Rocker Arm Pivot   51103 0203
33 87/01 Tappet (Lifter)   51001 0200
34 87/04 Push Rod   51102 0009
35 87/92 Timing Cover   51010 0004
  93/99     51010 01
36 87/91 Gasket & Seal Kit, Timing   51010 98
37 87/04 Seal, Crankshaft Front Front Main Seal 55125 0901
38 87/04 Gasket, Timing Cover   51010 0095
39 87/04 Snubber, Timing Chain   51010 0005
40 87/93 Chain, Timing Sprocket tooth thickness = .28" 51006 1002
  94/04   Sprocket tooth thickness = .40" 51006 1003
41 87/93 Sprocket, Camshaft Sprocket tooth thickness = .28" 51001 1002
  94/98   Sprocket tooth thickness = .40" 51001 1003
  99/04     51001 1004
42 87/93 Sprocket, Crankshaft Sprocket tooth thickness = .28" 51008 1001
  94/04   Sprocket tooth thickness = .40" 51008 1002
43 87/04 Damper, Vibration   17005 52
44 87/00 Slinger, Oil   55125 0400
45 87/91 Bearing, Crankshaft Pilot   52008 00
  92/99     52008 01
46 87/93 Ring Gear, Flywheel w/ Manual Transmission 51005 50
47 87/04 Seal Kit, Crankshaft Rear Rear Main Seal 51002 0703
48 87/90 Manifold, Exhaust   27601 11
  91/99   includes Flex Bellows 27601 06
  00/04   Cast Iron- Front (WJ 99/04) 27601 13
  00/04   Cast Iron- Rear (WJ 99/04) 27601 14
49 87/90 Gasket, Manifold   51100 102
  91/99   w/ Tubular 1 pc. Manifold 51100 100
50 87/99 Mount, Front XJ & YJ Only 56003 0016
  93/96   XJ RHD Right 56003 0018
  93/99   XJ RHD Left 56003 03
  00/01   XJ 56003 03
  97/06   TJ Left & Right 56003 0019
  93/98   ZJ Right 56003 0020
  93/98   ZJ Left 56003 0021
  99/04   WJ Right 56003 0022
  99/04   WJ Left 56003 0023
51 91/95 Mount, Rear (transmission) YJ 56003 0024
  87/99   XJ 56003 0025
  00/01   XJ 56003 0026
  97/03   TJ 56003 0027
52 84/96 Insulator, Support Bracket XJ 56003 0028
53 87/90 Cushion Assembly w/ Peugeot BA10/5 Transmission 56003 07
54 93/96 Bracket Assembly, Rear ZJ - w/ Automatic Transmission 56003 0029
  93/96   ZJ - w/ Manual Transmission 56003 0030
55 97/98 Support, Transmission ZJ 56003 0031
  99/04   WJ 2WD only 56003 0032
56 87/95 Mount Kit YJ only 56003 03

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Throughout this web site all the preceding marks & logos are used for identification purposes only. Quadratec has no affiliation with the Chrysler LLC, MOPAR®, General Motors Company, Ford Motor Company, Suzuki Motor Corporation or Isuzu Motors Limited. It is not implied that any part listed is a product of, or approved by Chrysler LLC, General Motors Company, Ford Motor Company, Suzuki Motor Corporation or Isuzu Motors Limited.

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