Jeep CJ, YJ or TJ Wrangler Series OEM Style Replacement Parts - 4.0L 242 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 Set, Connecting Rod, Bolts, Main Bearing, Bearings, Camshaft Plug, Plugs, Camshaft, Intake Valves, Exhaust Valves, Seals, Locks, Rocker Arm, Exhaust Manifold and more.

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.

Home » OEM Style Jeep® Replacement Parts » Engine » 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			52449 5302

3	87/02	Gasket, Cylinder Head		52449 8585

4	87/99	Gasket Set, Upper		52449 4636
4a	87/99	Head Gasket Only		52449 8585

5	87/91	Gasket Set, Lower	w/ Cork & Rubber Oil Pan Set	52449 0700
	92/02		w/ 1 pc. Pan Gasket	52449 0701

6	87/90	Filter, Engine Oil	w/ METRIC Threads	52449 0496
	91/04		w/ SAE Threads	52449 0497

7	87/90	Pump, Oil		52449 0704
	91/04			52449 8586

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	52449 0706

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	52449 0709

10	87/91	Plug, Oil Pan	Plug & Gasket, Metric threads	51009 50
	91/02		1 piece, rubber coated, 1/2"-20	52449 0501

11	87/90	Grommet		52449 4762

12	87/95	Piston & Pin (each)	Standard	52449 0505
	87/95		+.010 “	52449 0506
	96/04		Standard	52449 0507

13	87/95	Ring Set (for 6 pistons)	Standard	52449 0716
	96/04		Standard	52449 0717

14	87/90	Rod, Connecting		52449 0509

15	87/04	Bolt, Connecting Rod	includes nut	52449 0510

16	87/04	Main Bearing, Crankshaft	Std. w/ offset tab (6 needed)	52449 0720

16A	90/04	Main Bearing Set	Std. w/ centered tab	52449 0511

17	87/89	Thrust Bearing,Crankshaft	Standard (1 needed)	52449 0513
	90/04		Standard ( 1 needed)	52449 0514

18	87/04	Bearing, Connecting Rod	Standard ( 6 needed)	52449 0515
			.010" Undersize (6 needed)	52449 0516

19	87/04	Plug, Camshaft	2-9/64" Diameter	52449 0520

20	87/04	Plug, Oil Hole	2" Diameter	52449 0521

22	87/95	Camshaft		52449 0729

23	87/98	Bearing Set, Camshaft	Set of 5	52449 0517
	99/02	Bearing Set, Camshaft	Set of 5	52449 0518
	87/98	Bearing Set, .010	Set of 5 - .010" Oversize	52449 0519

24	87/98	Valve, Intake, Std.	With head marked “ 15 “, w/ 1 groove	52449 0524
	98/04		w/ 3 radius cut grooves (on stem)	52449 0525

25	87/98	Valve, Exhaust, Std.	w/ 1 radius cut groove (on stem)	52449 0735
	98/04		w/ 3 radius cut grooves (on stem)	52449 0528

26	87/04	Seal, Valve Stem	Intake	52449 0529
			Exhaust	52449 0530

27	87/98	Lock, Valve Retainer	w/ 1 radius cut groove (on stem)	52449 0532
	98/04		w/ 3 radius cut grooves (on stem)	52449 0533

28	87/04	Rocker Arm		52449 0741

29	87/04	Pivot, Rocker Arm		52449 0534

30	87/04	Bridge, Rocker Arm Pivot		52449 0535

31	87/04	Pivot Kit	Contains 2 pivots & 1 bridge	52449 0536

32	87/04	Bolt, Rocker Arm Pivot		52449 0537

33	87/01	Tappet (Lifter)		52449 0539

34	87/04	Push Rod		52449 0747

35	87/92	Timing Cover		52449 0541
	93/99			51010 01

36	87/91	Gasket & Seal Kit, Timing		51010 98

37	87/04	Seal, Crankshaft Front	Front Main Seal	52449 0542

38	87/04	Gasket, Timing Cover		52449 0750

39	87/04	Snubber, Timing Chain		52449 0543

40	87/93	Chain, Timing	Sprocket tooth thickness = .28"	52449 0752
	94/04		Sprocket tooth thickness = .40"	52449 0753

41	87/93	Sprocket, Camshaft	Sprocket tooth thickness = .28"	52449 0754
	94/98		Sprocket tooth thickness = .40"	52449 0755
	99/04			52449 0756

42	87/93	Sprocket, Crankshaft	Sprocket tooth thickness = .28"	52449 0757
	94/04		Sprocket tooth thickness = .40"	52449 0758

43	87/04	Damper, Vibration		17005 52

44	87/00	Slinger, Oil		52449 0548

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	52449 0677

48	87/90	Manifold, Exhaust		27601 11
	91/99		includes Flex Bellows	27601 06
	91/97		less Flex Bellows	52449 0763
	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		52449 0764
	91/99		w/ Tubular 1 pc. Manifold	51100 100

50	87/99	Mount, Front	except ZJ	56003 03
	93/96		XJ RHD Right	52449 0765
	93/99		XJ RHD Left	56003 03
	00/01		XJ	56003 03
	97/02		TJ Left & Right	52449 0766
	3		TJ Right	52449 0766
	3		TJ Left	52449 0554
	93/98		ZJ Right	52449 0769
	93/98		ZJ Left	52449 0770
	99/04		WJ Right	52449 0771
	99/04		WJ Left	52449 0772

51	91/95	Mount, Rear (transmission)	YJ	52449 0773
	87/99		XJ	52449 0560
	00/01		XJ	52449 0775
	97/03		TJ	52449 0559

52	84/96	Insulator, Support Bracket	XJ	52449 0563

53	87/90	Cushion Assembly	w/ Peugeot BA10/5 Transmission	56003 07

54	93/96	Bracket Assembly, Rear	ZJ - w/ Automatic Transmission	52449 0778
	93/96		ZJ - w/ Manual Transmission	52449 0779

55	97/98	Support, Transmission	ZJ	52449 0780
	99/04		WJ 2WD only	52449 0781

56	87/95	Mount Kit	YJ only	56003 03

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