Jeep CJ, YJ or TJ Wrangler Series OEM Style Replacement Parts - 4.2L 258 AMC 6 Cylinder Engine Replacement Parts including Valve Covers, Gaskets, Filters, Oil Pump, Oil Pan, Oil Filter Cap, Oil Pan Plug, Grommet, Piston and Pin, Ring Sets, Connecting Rods, Bolts, Crankshaft Main Bearings, Bearings,Camshaft Plug, CRankshaft sprokets, Seal Kits Intake Valves and more.

If you're restoring or repairing a Jeep CJ, YJ or TJ Wrangler vehicle, check out our high quality OEM style 4.2L 258 AMC 6 Cylinder Engine Replacement Parts.

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
	72-80	Steel Valve Cover	Cap and gasket not included	51104 06

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_0634

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 0798

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 97

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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