Jeep MJ Comanche 4.0L 6 Cylinder Engine - Best Reviews & Prices at 4WP

Jeep MJ Comanche 4.0L 6 Cylinder Engine

Make Sure It Fits Your Vehicle

If your off-roading rig doesn't have a thick layer of mud and dirt when the sun goes down, then it's been a wasted day. Don't let the trail beat you in your quest to have the ultimate white-knuckle, full-throttle run. Swap out your old, worn out Jeep 6 cylinder engine parts with some of the premium aftermarket and OEM parts available from 4WheelParts.com and breath new life into your favorite off-roading rig. From an Omix-ADA valve cover gasket to a Crown Automotive oil filter, have all the rugged parts you need, no matter how big or small, to keep your Jeep MJ Comanche 4.0L engine running strong and conquering trails.

Tough Parts for a Hard-Core Engine
4WheelParts.com sells dozens of high-quality replacement parts for your MJ Comanche 4.0L 6-cylinder engine. Whether you're looking for a humble Jeep engine main bearing set or a rugged Jeep MJ Comanche camshaft, we carry them from trusted aftermarket and OEM manufacturers like Omix-ADA and Crown Automotive. We understand that your engine is the heart of your jeeping machine. That's why we only sell the toughest engine parts for your beloved rig. You jeeping adventures take you down some of the gnarliest trails, and 4WheelParts.com gives your Jeep the tools it needs to keep up with everything you throw at it. Swap out your gaskets, pumps and bolts today and get the performance upgrade you've been craving in your preferred rig.

Great Prices on Premium Equipment
4WheelParts.com knows that not everyone is a born mechanic, but you still want to take care of your hard-core jeeping machine. To help you with this, we offer free shipping on all qualifying orders over $75. We also allow you a customer-friendly 30-days, with no restocking fee, to return any items you ordered by mistake. Our 100% Price Match Guarantee means you never have to worry about paying more than the lowest price for anything you order from us. Order those parts you need today and check out why we have so many repeat customers.

136 Products
2
 Omix-ADA Engine Valve Cover Gaskets

Omix-ADA Engine Valve Cover Gaskets

Omix-Ada Engine Valve Cover Gasket

From $5.99

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3
 Crown Automotive Head Gasket

Crown Automotive Head Gasket

Crown Automotive Head Gasket

From $10.79

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3
 Omix-ADA Head Gaskets

Omix-ADA Head Gaskets

Omix-Ada Head Gasket

From $12.99

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5
 Crown Automotive Engine Lower Gasket Set

Crown Automotive Engine Lower Gasket Set

Crown Automotive Engine Lower Gasket Set

From $17.99

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Tax Paid
6
 Omix-ADA Oil Filters

Omix-ADA Oil Filters

Omix-Ada Oil Filter

From $5.99

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Tax Paid
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6
 Crown Automotive Oil Filter

Crown Automotive Oil Filter

Crown Automotive Oil Filter

From $4.99

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Tax Paid
7
 Crown Automotive Engine Oil Pump

Crown Automotive Engine Oil Pump

Crown Automotive Engine Oil Pump

From $28.99

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7
 Omix-ADA Oil Pumps

Omix-ADA Oil Pumps

Omix-Ada Oil Pump

From $3.99

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7
 Crown Automotive Engine Oil Pump Screen

Crown Automotive Engine Oil Pump Screen

Crown Automotive Engine Oil Pump Screen

From $57.99

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Tax Paid
8
 Crown Automotive Engine Oil Pans

Crown Automotive Engine Oil Pans

Crown Automotive Engine Oil Pan
5.0 5.0 (1)

From $37.99

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9
 Crown Automotive Oil Filler Cap

Crown Automotive Oil Filler Cap

Crown Automotive Oil Filler Cap

From $3.99

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9
 Omix-ADA Oil Caps

Omix-ADA Oil Caps

Omix-Ada Oil Cap

From $4.99

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11
 Crown Automotive Valve Cover Grommet

Crown Automotive Valve Cover Grommet

Crown Automotive Valve Cover Grommet
5.0 5.0 (1)

From $1.99

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12
 Crown Automotive Engine Piston And Pin

Crown Automotive Engine Piston And Pin

Crown Automotive Engine Piston And Pin

From $41.99

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12
 Omix-ADA Pistons

Omix-ADA Pistons

Omix-Ada Piston

From $15.99

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13
 Crown Automotive Engine Piston Ring Set

Crown Automotive Engine Piston Ring Set

Crown Automotive Engine Piston Ring Set

From $14.99

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13
 Omix-ADA Piston Ring Sets

Omix-ADA Piston Ring Sets

Omix-Ada Piston Ring Set

From $12.99

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14
 Crown Automotive Connecting Rod

Crown Automotive Connecting Rod

Crown Automotive Connecting Rod

From $31.97

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15
 Crown Automotive Connecting Rod Bolt

Crown Automotive Connecting Rod Bolt

Crown Automotive Connecting Rod Bolt

From $3.99

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16
 Omix-ADA Main Engine Bearing Sets

Omix-ADA Main Engine Bearing Sets

Omix-Ada Main Engine Bearing Set

From $64.99

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17
 Crown Automotive Crankshaft Thrust Bearing

Crown Automotive Crankshaft Thrust Bearing

Crown Automotive Crankshaft Thrust Bearing

From $11.99

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Tax Paid
17
 Crown Automotive Crankshaft Bearing

Crown Automotive Crankshaft Bearing

Crown Automotive Crankshaft Bearing

From $8.09

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Tax Paid
18
 Crown Automotive Connecting Rod Bearing Set

Crown Automotive Connecting Rod Bearing Set

Crown Automotive Connecting Rod Bearing Set

From $21.99

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19
 Crown Automotive Camshaft Plug

Crown Automotive Camshaft Plug

Crown Automotive Camshaft Plug

From $2.99

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22
 Omix-ADA Camshafts

Omix-ADA Camshafts

Omix-Ada Camshaft

From $136.99

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22
 Crown Automotive Camshafts

Crown Automotive Camshafts

Crown Automotive Camshaft

From $98.99

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23
 Omix-ADA Camshaft Bearings

Omix-ADA Camshaft Bearings

Omix-Ada Camshaft Bearing

From $13.99

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24
 Crown Automotive Intake Valve

Crown Automotive Intake Valve

Crown Automotive Intake Valve

From $6.99

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Tax Paid
25
 Crown Automotive Exhaust Valve

Crown Automotive Exhaust Valve

Crown Automotive Exhaust Valve

From $7.99

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Tax Paid
26
 Omix-ADA Intake Valve Stem Seals

Omix-ADA Intake Valve Stem Seals

Omix-Ada Intake Valve Stem Seal

From $5.99

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27
 Crown Automotive Valve Spring Retainer Keeper

Crown Automotive Valve Spring Retainer Keeper

Crown Automotive Valve Spring Retainer Keeper

From $0.99

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Tax Paid
28
 Crown Automotive Rocker Arms

Crown Automotive Rocker Arms

Crown Automotive Rocker Arms

From $5.99

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28
 Omix-ADA Rocker Arms

Omix-ADA Rocker Arms

Omix-Ada Rocker Arm

From $6.99

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29
 Omix-ADA Rocker Arm Pivots

Omix-ADA Rocker Arm Pivots

Omix-Ada Rocker Arm Pivot

From $2.99

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29
 Crown Automotive Rocker Arm Pivots

Crown Automotive Rocker Arm Pivots

Crown Automotive Rocker Arm Pivots

From $1.79

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30
 Omix-ADA Rocker Arm Bridges

Omix-ADA Rocker Arm Bridges

Omix-Ada Rocker Arm Bridge

From $3.99

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30
 Crown Automotive Rocker Arm Pivot Bridge

Crown Automotive Rocker Arm Pivot Bridge

Crown Automotive Rocker Arm Pivot Bridge

From $1.79

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32
 Crown Automotive Rocker Arm Pivot Bolt

Crown Automotive Rocker Arm Pivot Bolt

Crown Automotive Rocker Arm Pivot Bolt

From $1.99

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33
 Crown Automotive Valve Springs

Crown Automotive Valve Springs

Crown Automotive Valve Spring

From $0.99

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34
 Omix-ADA Valve Lifters

Omix-ADA Valve Lifters

Omix-Ada Valve Lifter

From $8.99

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34
 Crown Automotive Valve Lifter

Crown Automotive Valve Lifter

Crown Automotive Valve Lifter

From $6.97

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Tax Paid
35
 Crown Automotive Push Rod

Crown Automotive Push Rod

Crown Automotive Push Rod

From $1.99

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Tax Paid
35
 Omix-ADA Push Rods

Omix-ADA Push Rods

Omix-Ada Push Rod

From $1.99

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36
 Omix-ADA Timing Chain Covers

Omix-ADA Timing Chain Covers

Omix-Ada Timing Chain Cover

From $60.99

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37
 Crown Automotive Timing Gasket And Seal Kit

Crown Automotive Timing Gasket And Seal Kit

Crown Automotive Timing Gasket And Seal Kit

From $6.99

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Tax Paid
37
 Omix-ADA Timing Cover Gasket Sets

Omix-ADA Timing Cover Gasket Sets

Omix-Ada Timing Cover Gasket Set

From $4.99

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38
 Crown Automotive Crankshaft Seal

Crown Automotive Crankshaft Seal

Crown Automotive Crankshaft Seal

From $1.99

More Info
Tax Paid
38
 Omix-ADA Crankshaft Oil Seals

Omix-ADA Crankshaft Oil Seals

Omix-Ada Crankshaft Oil Seal

From $0.99

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39
 Crown Automotive Timing Cover Gasket

Crown Automotive Timing Cover Gasket

Crown Automotive Timing Cover Gasket

From $2.99

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Tax Paid
40
 Crown Automotive Timing Chain Guide

Crown Automotive Timing Chain Guide

Crown Automotive Timing Chain Guide

From $4.99

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Tax Paid
40
 Omix-ADA Timing Chain Guides

Omix-ADA Timing Chain Guides

Omix-Ada Timing Chain Guide

From $7.99

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41
 Crown Automotive Engine Timing Chain

Crown Automotive Engine Timing Chain

Crown Automotive Engine Timing Chain

From $12.99

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Tax Paid
41
 Crown Automotive Timing Kit

Crown Automotive Timing Kit

Crown Automotive Timing Kit

From $49.97

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41
 Omix-ADA Timing Chains

Omix-ADA Timing Chains

Omix-Ada Timing Chain

From $16.99

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42
 Omix-ADA Camshaft Gear/Sprockets

Omix-ADA Camshaft Gear/Sprockets

Omix-Ada Camshaft Gear/Sprocket

From $17.99

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42
 Crown Automotive Camshaft Sprocket

Crown Automotive Camshaft Sprocket

Crown Automotive Camshaft Sprocket

From $19.99

More Info
Tax Paid
43
 Crown Automotive Crankshaft Sprocket

Crown Automotive Crankshaft Sprocket

Crown Automotive Crankshaft Sprocket

From $16.99

More Info
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43
 Omix-ADA Crankshaft Gear/Sprockets

Omix-ADA Crankshaft Gear/Sprockets

Omix-Ada Crankshaft Gear/Sprocket

From $12.99

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44
 Crown Automotive Harmonic Balancers

Crown Automotive Harmonic Balancers

Crown Automotive Harmonic Balancer

From $0.89

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45
 Crown Automotive Oil Slingers

Crown Automotive Oil Slingers

Crown Automotive Oil Slinger

From $2.99

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46
 Crown Automotive Clutch Pilot Bearings

Crown Automotive Clutch Pilot Bearings

Crown Automotive Pilot Bearing

From $3.99

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Tax Paid
47
 Crown Automotive Flywheel Ring Gear

Crown Automotive Flywheel Ring Gear

Crown Automotive Flywheel Ring Gear

From $20.69

More Info
Tax Paid
48
 Crown Automotive Flywheel Assembly

Crown Automotive Flywheel Assembly

Crown Automotive Flywheel Assembly

From $109.99

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50
 Omix-ADA Exhaust Manifolds

Omix-ADA Exhaust Manifolds

Omix-Ada Exhaust Manifold

From $91.99

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50
 RT Off-Road Exhaust Manifolds

RT Off-Road Exhaust Manifolds

RT Off-Road Exhaust Manifold

From $252.99

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51
 Crown Automotive Exhaust Manifold Gaskets

Crown Automotive Exhaust Manifold Gaskets

Crown Automotive Exhaust Manifold Gasket

From $3.99

More Info
Tax Paid
52
 Crown Automotive Engine Mounts

Crown Automotive Engine Mounts

Crown Automotive Engine Mount
5.0 5.0 (2)

From $4.49

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Tax Paid
8a
 Crown Automotive Engine Oil Pan Gasket

Crown Automotive Engine Oil Pan Gasket

Crown Automotive Engine Oil Pan Gasket

From $2.99

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Crown Automotive PCV Valve

Crown Automotive PCV Valve

From $1.99

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Omix-ADA Engine Gasket Sets

Omix-Ada Engine Gasket Set

From $31.99

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Omix-ADA Exhaust Valves

Omix-Ada Exhaust Valve

From $9.99

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Tax Paid
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Crown Automotive Valve Cover Gasket

Crown Automotive Valve Cover Gasket
4.0 4.0 (1)

From $1.99

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Tax Paid

Omix-ADA Camshaft Kits

Omix-Ada Camshaft Kit

From $213.99

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Crown Automotive Engine Mount Kits

Crown Automotive Engine Mount Kit

From $15.97

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Omix-ADA Intake Valves

Omix-Ada Intake Valve

From $7.99

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Omix-ADA Radiator Hoses

Omix-Ada Radiator Hose

From $9.99

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Crown Automotive Intake Manifold Gaskets

Crown Automotive Intake Manifold Gasket

From $1.99

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Omix-ADA Timing Chain Kits

Omix-Ada Timing Kit

From $53.99

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Tax Paid
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Omix-ADA Oil Pans

Omix-Ada Oil Pan

From $111.99

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Omix-ADA Connecting Rod Bearings

Omix-Ada Connecting Rod Bearing

From $8.99

More Info
Tax Paid
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Crown Automotive Engine Mount Isolator

Crown Automotive Engine Mount Isolator

From $1.99

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Crown Automotive Oil Pressure Sending Unit

Crown Automotive Oil Pressure Sending Unit

From $3.99

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Omix-ADA Engine Mounts

Omix-Ada Engine Mount

From $8.99

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Crown Automotive Exhaust Manifolds

Crown Automotive Exhaust Manifolds

From $64.79

More Info
Tax Paid

Daystar Torque Arm Bushing

Daystar Torque Arm Bushing

From $7.99

More Info
Tax Paid

Crown Automotive Head Gasket Set

Crown Automotive Head Gasket Set

From $26.99

More Info
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Crown Automotive Crankshaft Main Bearing Set

Crown Automotive Crankshaft Main Bearing Set

From $57.99

More Info
Tax Paid

Crown Automotive Transmission Mounts

Crown Automotive Transmission Mount

From $5.99

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Omix-ADA Rocker Arm Stud Nuts

Omix-Ada Rocker Arm Stud Nut

From $2.99

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Omix-ADA Valve Covers

Omix-Ada Valve Cover
3.0 3.0 (2)

From $9.99

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Omix-ADA Pilot Bushings

Omix-Ada Pilot Bushing

From $3.99

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Omix-ADA Flex Plates

Omix-Ada Automatic Flywheels

From $40.06

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Crown Automotive Auto Trans Flexplate

Crown Automotive Auto Trans Flexplate

From $41.39

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Crown Automotive Connecting Rod Bearing

Crown Automotive Connecting Rod Bearing

From $7.19

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Tax Paid
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Omix-ADA Timing Cover Seals

Omix-Ada Timing Cover Seal

From $7.99

More Info
Tax Paid
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Omix-ADA PCV Valves

Omix-Ada PCV Valve

From $2.99

More Info
Tax Paid
Rebate

Crown Automotive Engine Upper Gasket Set

Crown Automotive Engine Upper Gasket Set

From $6.49

More Info
Tax Paid

Crown Automotive Exhaust Valve Guide

Crown Automotive Exhaust Valve Guide

From $5.99

More Info
Tax Paid

Crown Automotive Camshaft Gear

Crown Automotive Camshaft Gear

From $22.99

More Info
Tax Paid