Home > Jeep Engine Parts > 4.2 liter (258) AMC Engine Parts

Jeep AMC 6-Cylinder 4.2L (258ci) Engine Parts

Years: 1972-1990

The 258 cubic inch (4.2 L) "258" in-line six was manufactured from 1971 until 1990. It emphasized an 3.895 inch (98.93 mm) stroke and undersquare 3.75 inch (95.25 mm) bore. It was like the 199 and 232. Subsequent 258 models (starting with the 1980 model year for California AMCs, 1981 for California Jeeps and 1982 for all other applications) are furnished with AMC's CEC system.

Click on image numbers to find parts in table below

4.2 Liter (258) AMC Engine. Valve cover Gasket, Valve Cover Cylinder Head Gasket, Cylinder Head Gasket Set, Upper Gasket Set, Lower Overhaul Gasket & Seal Kit Pump, Oil Oil Pan Oil Pan Gasket Set Cap, Oil Filler Plug, Oil Pan Grommet PCV Valve Piston & Pin (each) Ring Set Rod, Connecting Bolt, Connecting Rod Main Bearing Set, Crankshaft Thrust Bearing, Crankshaft Bearing, Connecting Rod Plug, Camshaft Plug, Oil Hole Sprocket, Crankshaft Sprocket, Crankshaft Bearing, Crankshaft Pilot Ring Gear, Flywheel Flywheel Assembly Seal, Crankshaft Rear Camshaft Bearing Set, Camshaft Valve, Intake Valve, Exhaust Deflector Lock, Valve Retainer Spring, Valve Rocker Arm Pivot, Rocker Arm Bridge, Rocker Arm Pivot Pivot Kit Rocker Arm Kit Rocker Arm Kit Bolt, Rocker Arm Pivot Tappet (Lifter) Push Rod Timing Cover Timing Cover Gasket & Seal Kit Seal, Crankshaft Front Seal, Crankshaft Front Gasket, Timing Cover Chain, Timing Sprocket, Camshaft Kit, Timing Damper, Vibration Slinger, Oil Manifold, Exhaust Gasket, Exhaust Manifold Engine Mount, Front Engine Mount, Front Poly Red Mount, Rear (transmission) Stud, Insulator Insulator Insulator Poly Red Mount Kit Filter, Engine Oil Valve cover Cylinder Head Oil Pan Camshaft Timing Cover Manifold, Exhaust Plug, Camshaft Engine Mount, Front Engine Mount, Front Engine Mount, Front Poly Red Gasket Set, Upper Cylinder Head Gasket Set, Upper Gasket Set, Upper Kit, Timing Damper, Vibration Filter, Engine Oil Insulator Poly Red Mount, Rear (transmission)
Item Image Description Year Range Comments Part Number Buy Now
1 Valve Cover, Plastic 1981-1986 Cover only 83501398 $49.99
Valve Cover, Plastic Kit 1981-1986 includes Neoprene Gasket 83501398K $59.99
Valve Cover, Aluminum Plain 1981-1986 includes Gasket & Hardware 83501398-AL $109.99
Valve Cover, Aluminum Black 1981-1986 includes Gasket & Hardware 83501398-ALB $114.99
Valve Cover, Aluminum Black 1981-1986 Cover Only 4626079AB $299.99
Valve Cover, Aluminum Polished 1981-1986 w/ "4.2L" Logo w/ Gasket & Hardware 83501398K-AL-S $129.99
2 Gasket, Valve Cover 1981-1986 Layered Foam Rubber 8053050 $24.99
Gasket, Valve Cover 1981-1986 Gasket for Aluminum Cover Only 8053050C-AL $12.99
Gasket Set, Valve Cover 1981-1986 Gasket Kit w/ Hardware for Aluminum Cover 258-HDW $22.99
Gasket Set, Valve Cover 1972-1980 6 Cyl, 258 or 232 3227854 $8.99
3 Cylinder Head 1987-1990 Cylinder Head Only - No Valves,Lifters,Springs,etc. 83503322 $485.99
3a Gasket, Cylinder Head 1968-1990 3237756 $16.99
4 Gasket Set, Upper 1972-1990 Includes Both Styles of Valve Cover Gasket 83502384 $39.99
5 Gasket Set, Lower 1975-1990 8125722 $24.99
6 Overhaul Gasket & Seal Kit 1981-1990 Includes 4 and 5 FS31151 $53.99
Overhaul Gasket Set 1968-1980 8124691 $49.99
7 Pump, Oil 1972-1980 Includes Inlet Tube 3181340 $124.99
Pump, Oil 1981-1990 Includes Inlet Tube 3242141 $137.99
Pump, Oil 1981-1990 Without Screen 3242141WO $134.99
8 Oil Pan 1972-1989 3243152 $148.99
8a Oil Pan Gasket Set 1972-1990 Cork and Rubber set (4 pc.) 83504662 $9.99
Oil Pan Gasket 1972-1990 1 Piece - Molded Reinforced Rubber 53007568AC $29.99
9 Cap, Oil Filler 1974-1980 8132312 $3.99
Cap, Oil Filler 1981-1990 33001016 $4.99
10 Plug, Oil Pan 1972-1984 1/2" x 20 magnetic 3206696 $2.99
Plug, Oil Pan 1985-1990 Plug & Gasket, Metric threads 83501425 $1.99
11 Grommet 1981-1986 0.48" Internal Diameter 8134400 $1.49
Grommet 1987-1990 0.66" Internal Diameter 53000957 $1.99
Grommet 1976-1986 0.45" Internal Diameter Export 3225627 $0.99
11a PCV Valve 1974-1978 J3211538 $2.99
PCV Valve 1978-1980 With AMC 232 or 258 J3236680 $2.99
PCV Valve 1981 AMC 258 J3240359 $3.99
PCV Valve 1982-1986 AMC 258 J3241629 $2.99
PCV Valve 1983-1986 33000887 $2.99
11b CCV Valve Fitting Assembly 1991-1993 53030492 $9.99
Elbow, Valve Cover Emissions 1980-1992 3236685 $1.99
12 Piston & Pin (each) 1966-1978 Standard 4488672 $34.99
Piston & Pin (each) 1979-1990 Standard 8134441 $52.99
Piston & Pin (each) 1979-1990 .020" Oversize 8134441.02 $55.99
Piston & Pin (each) 1979-1990 .030" Oversize 8134441.03 $54.99
.020 Over Piston With Pin 1966-1978 .020" Oversize 4488672.02 $34.99
.030 Over Piston Ring Set 1968-1990 .030" Oversize 4488672.03 $34.99
13 Ring Set For 6 Pistons Standard 1972-1990 Standard 83506383 $79.99
Ring Set For 6 Pistons .010 Over 1968-1990 .010" Oversize 83506384 $85.99
Ring Set For 6 Pistons .020 Over 1968-1990 .020" Oversize 4485572.02 $49.99
.030 Over Piston With Pin 1966-1978 .030" Oversize 4485572.03 $49.99
14 Rod, Connecting 1972-1990 Includes Nut 3237812 $29.99
15 Bolt, Connecting Rod 1972-1990 53020123 $3.99
16 Main Bearing Set, Crankshaft 1972-1990 Includes 6 83507079K $96.99
Main Bearing Set, Crankshaft 1972-1990 .010" Oversize Includes 6 4289M.010 $113.99
Main Bearing Set, Crankshaft 1972-1990 .020" Oversize Includes 6 4289M.020 $107.99
Main Bearing Set, Crankshaft 1972-1990 .030" Oversize Includes 6 4289M.030 $113.99
17 Thrust Bearing, Crankshaft 1972-1990 Standard (1 needed) 83507084 $14.99
18 Bearing, Connecting Rod 1972-1990 Standard (6 needed) 83500300AB $9.99
Bearing, Connecting Rod 1972-1990 .001" Oversize (6 Needed) 8126205 $9.99
Bearing, Connecting Rod 1972-1990 .010" Oversize (6 needed) 83500301AB $9.99
Bearing, Connecting Rod 1972-1990 .020" Oversize (6 Needed) 8126204.020 $9.99
Bearing, Connecting Rod 1972-1990 .030" Oversize (6 Needed) 8126204.030 $9.99
19 Plug, Camshaft 1972-1990 2-9/64" Diameter 3172313 $1.99
20 Plug, Oil Hole 1972-1990 2" Diameter 3105394 $1.97
21 Sprocket, Crankshaft 1972-1990 33004107 $13.99
22 Bearing, Crankshaft Pilot 1972-1976 3213751 $2.99
Bearing, Crankshaft Pilot 1976-1979 3222723 $2.99
Bearing, Crankshaft Pilot 1980-1986 Bushing type 3236726 $4.99
Bearing, Crankshaft Pilot 1987-1990 Bearing type 33004041 $7.99
23 Ring Gear, Flywheel 1972-1990 w/ Manual Transmission 3179741 $21.99
24 Flywheel Assembly 1982-1987 1982-1986 CJ, 1987 YJ, 1982-1987 SJ 3240094 $118.99
Flywheel Assembly 1988-1990 Wrangler YJ 33002672 $129.99
25 Seal, Crankshaft Rear 1972-1990 Rear Main Seal 4778126 $9.99
26 Camshaft 1968-1978 8132907 $99.99
Camshaft 1979-1990 8133009 $110.99
Camshaft Kit 1981-1990 Includes camshaft, lifters & assembly lube CLSRC8 $146.99
27 Bearing Set, Camshaft 1972-1990 Set of 5 3205711 $32.99
Bearing Set, Camshaft 1972-1990 Set of 5 - .010" Oversize 3208985 $29.99
28 Valve, Intake 1973-1980 Standard 3218732 $12.99
Valve, Intake 1973-1980 .003" Oversize 3218809 $13.99
Valve, Intake 1973-1980 .015" Oversize 3218810 $13.99
Valve, Intake 1981-1990 Standard 3240768 $15.99
Valve, Intake 1981-1990 .003" Oversize 3240166 $12.99
Valve, Intake 1981-1990 .015" Oversize 3240167 $15.99
29 Valve, Exhaust 1973-1980 Standard 3224597 $11.99
Valve, Exhaust 1973-1980 .003" Oversize 3224602 $12.99
Valve, Exhaust 1973-1980 .015" Oversize 3224603 $12.99
Valve, Exhaust 1981-1990 Standard 3240767 $18.99
Valve, Exhaust 1981-1990 .003" Oversize 3240163 $18.99
Valve, Exhaust 1981-1990 .015" Oversize 3240164 $20.99
30 Deflector 1972-1990 Standard 3218976 $0.99
Deflector 1972-1990 .015" Oversize 3218977 $0.99
31 Lock, Valve Retainer 1981-1990 3180458 $0.99
32 Spring, Valve 1977-1990 3228192 $9.99
33 Rocker Arm 1975-1982 3223888 $4.99
Rocker Arm 1983-1990 3242393 $4.99
34 Pivot, Rocker Arm 1972-1979 CJ5, CJ6 and CJ7 3210178 $6.99
Pivot, Rocker Arm 1980-1990 3235090 $1.99
35 Bridge, Rocker Arm Pivot 1980-1990 Without Stud MRM1718 $3.99
Bridge, Rocker Arm Pivot 1981-1986 With Stud (2 Required for Plastic Valve Covers) 3237851 $4.99
36 Pivot Kit 1980-1990 Contains 2 Pivots & 1 Bridge 3236513K $3.99
36a Rocker Arm Kit 1974-1982 12 rocker arms and 6 aluminum pivots 3223888K $59.99
Rocker Arm Kit 1974-1982 12 rocker arms and 6 steel pivots 3223888KL $64.99
36b Rocker Arm Kit 1974-1982 2 rocker arms, 2 pivots and 1 bridge MRK5412 $26.99
Rocker Arm Kit 1983-1990 2 rocker arms, 2 pivots and 1 bridge w/o Stud MRK5512 $22.99
Rocker Arm Kit 1983-1990 2 rocker arms, 2 pivots and 1 bridge with Stud MRK5522 $23.99
37 Bolt, Rocker Arm Pivot 1972-1990 9425708 $1.99
38 Tappet (Lifter) 1972-1990 4740269 $6.99
MOPAR Lifter 1981-2006 4.0L 53010574AB-M $25.99
39 Push Rod 1972-1977 1977 Models w/ Temp Sender in Front of Head 3214013 $1.99
Push Rod 1977-1980 1977 Models w/ Temp Sender in Rear of Head 3227329 $1.99
Push Rod 1981-1990 3242395 $2.99
40 Timing Cover 1965-1990 53005769 $48.99
Timing Cover 1975-1990 With Molded Oil Pan Gasket 4720223 $59.99
41 Timing Cover Gasket & Seal Kit 1965-1990 8129097 $6.99
43 Gasket, Timing Cover 1972-1990 53020487 $2.99
44 Chain, Timing 1972-1990 3240781 $17.99
45 Sprocket, Camshaft 1972-1990 3172306 $16.99
46 Kit, Timing 1972-1990 8126681K $69.99
47 Vibration Damper - Harmonic Balancer 1972-1990 with V-belts 3225201 $74.99
Vibration Damper - Harmonic Balancer 1981-1993 3242886 $68.97
MOPAR Vibration Damper, Harmonic Balancer 1991-2002 33002879AB $79.99
MOPAR Performance Serpentine Belt Vibration Damper 4.2L 1981-1990 P5249688 $259.99
48 Slinger, Oil 1972-1990 3173076 $1.99
49 Manifold, Exhaust 1972-1979 8124999 $172.99
47 Manifold, Exhaust 1980-1990 add 6-G444618 w/ no emissions pump 3237427 $184.99
49a Plugs for Manifold 1980-1990 For 3237427 Manifold w/o Emissions pump 444618 $0.99
50 Gasket, Exhaust Manifold 1972-1979 Intake to Exhaust Manifold 3184277 $1.99
52 Engine Mount, Front 1977-1990 CJ5, CJ7, CJ8 & Cherokee SJ 8128488 $13.99
Engine Mount, Front 1987-1990 Wrangler YJ 52019201 $15.99
52a Engine Mount, Front?Poly Red 1977-1990 CJ5, CJ7, CJ8 & Cherokee SJ 21102R $31.99
Engine Mount, Front?Poly Black 1977-1990 CJ5, CJ7, CJ8 & Cherokee SJ Energy 21102G $31.99
53 Mount, Rear (transmission) 1972-1990 CJ5, CJ7, CJ8 & Cherokee SJ Energy 1370910 $11.99
Mount, Rear (transmission) 1987-1990 Wrangler YJ 52002625 $19.99
54 Stud, Insulator 1976-1990 w/ manual transmission 5358879 $4.99
55 Insulator 1976-1990 w/ manual transmission 945266 $1.99
55A Insulator Poly Red 1976-1990 Energy Suspensions Polyurethane 21101R $5.99
Insulator Poly Black 1976-1990 Energy Suspensions Polyurethane 21101G $5.99
56 Mount Kit 1978-1986 CJ5, CJ7 and CJ8 Scrambler 8128488K $32.99
57 Filter, Engine Oil 1972-1982 8993146 $5.99
Filter, Engine Oil 1983-1986 3242397 $5.99
Filter, Engine Oil 1987-1990 w/ METRIC Threads 33004195 $7.99
Royal Purple Extended Life Oil Filter 1976-1986 Special Particle Removal
1976-1986 Jeep CJ7 4.2L & 2.5L
RPL-10-47 $12.99

Years Covered: 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, & 1990

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