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Home » OEM Style Jeep® Replacement Parts » Engine » 4.2L 258 AMC 6 Cylinder Engine Parts
4.2L 258 AMC 6 Cylinder Engine Parts Exploded View Diagram

Item # Years Description Comments Part #
1   VALVE COVERS    
  81/86 OEM Plastic type Cover only 51104 00
  81/86 OEM Plastic type - Kit Includes Gasket & Hardware 51104 00
  81/86 Aluminum, Plain Includes Gasket & Hardware 51104 04 07
  81/86 Aluminum, Black Includes Gasket & Hardware 52449 0783
2 81/86 Gasket, Valve Cover Layered Foam Rubber 51100 53
  81/86   Use RTV Silicone 52152 03
3 72/90 Gasket, Cylinder Head   52449 0784
4 72/90 Gasket Set, Upper   51100 02
5 75/90 Gasket Set, Lower   51002 00
6 72/82 Filter, Engine Oil   52449 0639
  83/86     52449 0786
  87/90   w/ METRIC Threads 52449 0496
7 72/80 Pump, Oil Includes inlet tube 52449 0634
  81/90   Includes inlet tube 52449 0789
8 72/89 Oil Pan   51009 01
8A 72/90 Gasket Set, Oil Pan Cork and Rubber set (4 pc.) 51002 50
  72/90   1 Piece - Silicone 52449 0706
9 81/90 Cap, Oil Filler   51101 03
10 72/84 Plug, Oil Pan 1/2" x 20 magnetic 52449 0682
  85/90   Plug & Gasket, Metric threads 51009 50
11 81/86 Grommet .48" I.D. 51309 99
  76/86   .45" I.D. Export 51309 98
  87/90   .66" I.D. 52449 0502
12 79/90 Piston & Pin (each) Standard 52449 0793
13 72/90 Ring Set (for 6 pistons) Standard 52449 0794
  72/90   +.010 “ 52449 0795
14 72/90 Rod, Connecting   52449 0796
15 72/90 Bolt, Connecting Rod Includes nut 52449 0510
16 72/90 Main Bearing, Crankshaft Standard (6 needed) 52449 0511
17 72/90 Thrust Bearing,Crankshaft Standard (1 needed) 52449 0513
18 72/90 Bearing, Connecting Rod Standard (6 needed) 52449 0515
      .010" Undersize (6 needed) 52449 0516
19   Plug, Camshaft 2-9/64" Diameter 52449 0520
20   Plug, Oil Hole 2" Diameter 52449 0521
21   Sprocket, Crankshaft   52449 0804
22   Bearing, Crankshaft Pilot Bushing type 52008 06
      Bearing type 52008 00
23   Ring Gear, Flywheel w/ Manual Transmission 51005 50
24   Seal Kit, Crankshaft Rear Rear Main Seal 52449 0677
25   Camshaft   52449 0631
26   Bearing Set, Camshaft Set of 5 52449 0517
    Bearing Set, .010 Set of 5 - .010" Oversize 52449 0519
27 81/90 Valve, Intake Standard except “VAM” engine 52449 0809
  81/90   .015" Oversize 52449 0590
28 81/90 Valve, Exhaust Standard except “VAM” engine 52449 0811
  81/90   .015" Oversize 52449 0595
29 72/90 Deflector Standard 52449 0584
      .015" Oversize 52449 0585
30 81/90 Lock, Valve Retainer Except “VAM” engine 52449 0578
31 77/90 Spring, Valve Except “VAM” engine 52449 0583
32 75/82 Rocker Arm   52449 0572
  83/90     52449 0741
33 80/90 Pivot, Rocker Arm   52449 0534
34 80/90 Bridge, Rocker Arm Pivot Except “VAM” engine (no stud Inlcuded) 52449 0535
  81/86   Except “VAM” engine (includes studs) 51104 51
35 80/90 Pivot Kit Contains 2 pivots & 1 bridge 52449 0536
36 72/90 Bolt, Rocker Arm Pivot   52449 0537
37 72/90 Tappet (Lifter) Except “VAM” engine 52449 0539
38 81/90 Push Rod Except “VAM” engine 52449 0747
39 75/86 Timing Cover   51010 02
  87/90     52449 0541
40 74/90 Gasket & Seal Kit, Timing   51010 98
41 72/90 Seal, Crankshaft Front   52449 0542
42 72/90 Gasket, Timing Cover   52449 0750
43 72/90 Chain, Timing   52449 0828
44 72/90 Sprocket, Camshaft   52449 0829
45 72/90 Kit, Timing   52449 0830
46 75/90 Damper, Vibration w/ V-belts 27800 01
47 72/90 Slinger, Oil   52449 0548
48 72/79 Manifold, Exhaust   27601 02
  80/90   Add 6-G444618 w/ no emissions pump 52449 0832
49 72/79 Gasket, Exhaust Manifold Intake to Exhaust Manifold 52449 0649
50 72/90 Gasket, Exhaust Manifold Manifold to Cylinder Head 52449 0834
51 77/90 Mount, Front   56003 01
52 72/90 Mount, Rear (transmission)   52449 0557
53 76/90 Insulator w/ manual transmission 52449 0564
54 76/90 Stud, Insulator w/ manual transmission 56003 50
55 78/86 Mount Kit CJs 56003 01


The VAM engine was built from 1982-1985. These engines have an "M" code on the engine ID plate, which consists of a sequential number for the various plants which may have produced engines, in this case "M" (for MEXICO) plant. The plate is located on the side of the block toward the front, on the oil filter side.
 
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