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.

135 Product Groups
  • 2
     Omix-ADA Engine Valve Cover Gaskets

    Omix-ADA Engine Valve Cover Gaskets

    Omix-Ada Engine Valve Cover Gasket

    From $24.29

    On Sale
    3
     Crown Automotive Head Gasket

    Crown Automotive Head Gasket

    Crown Automotive Head Gasket

    From $10.99

    3
     Omix-ADA Head Gaskets

    Omix-ADA Head Gaskets

    Omix-Ada Head Gasket

    From $11.69

    On Sale
    5
     Crown Automotive Engine Lower Gasket Set

    Crown Automotive Engine Lower Gasket Set

    Crown Automotive Engine Lower Gasket Set

    From $20.99

    6
     Crown Automotive Oil Filter

    Crown Automotive Oil Filter

    Crown Automotive Oil Filter

    From $11.99

    6
     Omix-ADA Oil Filters

    Omix-ADA Oil Filters

    Omix-Ada Oil Filter

    From $13.49

    On Sale
    7
     Crown Automotive Engine Oil Pump

    Crown Automotive Engine Oil Pump

    Crown Automotive Engine Oil Pump

    From $106.99

    7
     Omix-ADA Oil Pumps

    Omix-ADA Oil Pumps

    Omix-Ada Oil Pump

    From $106.19

    On Sale
    7
     Crown Automotive Engine Oil Pump Screen

    Crown Automotive Engine Oil Pump Screen

    Crown Automotive Engine Oil Pump Screen

    From $57.99

    8
     Crown Automotive Engine Oil Pans

    Crown Automotive Engine Oil Pans

    Crown Automotive Engine Oil Pan
    3.7 3.7 (3)

    From $103.99

    On Sale
    9
     Omix-ADA Oil Caps

    Omix-ADA Oil Caps

    Omix-Ada Oil Cap

    From $11.69

    On Sale
    9
     Crown Automotive Oil Filler Cap

    Crown Automotive Oil Filler Cap

    Crown Automotive Oil Filler Cap
    5.0 5.0 (1)

    From $3.99

    11
     Crown Automotive Valve Cover Grommet

    Crown Automotive Valve Cover Grommet

    Crown Automotive Valve Cover Grommet
    5.0 5.0 (1)

    From $0.99

    12
     Omix-ADA Pistons

    Omix-ADA Pistons

    Omix-Ada Piston

    From $16.19

    On Sale
    12
     Crown Automotive Engine Piston And Pin

    Crown Automotive Engine Piston And Pin

    Crown Automotive Engine Piston And Pin

    From $237.99

    13
     Crown Automotive Engine Piston Ring Set

    Crown Automotive Engine Piston Ring Set

    Crown Automotive Engine Piston Ring Set

    From $102.99

    13
     Omix-ADA Piston Ring Sets

    Omix-ADA Piston Ring Sets

    Omix-Ada Piston Ring Set

    From $101.69

    On Sale
    14
     Crown Automotive Connecting Rod

    Crown Automotive Connecting Rod

    Crown Automotive Connecting Rod

    From $32.99

    15
     Crown Automotive Connecting Rod Bolt

    Crown Automotive Connecting Rod Bolt

    Crown Automotive Connecting Rod Bolt

    From $3.99

    16
     Omix-ADA Main Engine Bearing Sets

    Omix-ADA Main Engine Bearing Sets

    Omix-Ada Main Engine Bearing Set

    From $101.69

    On Sale
    17
     Crown Automotive Crankshaft Thrust Bearing

    Crown Automotive Crankshaft Thrust Bearing

    Crown Automotive Crankshaft Thrust Bearing

    From $11.99

    17
     Crown Automotive Crankshaft Bearing

    Crown Automotive Crankshaft Bearing

    Crown Automotive Crankshaft Bearing

    From $9.99

    18
     Crown Automotive Connecting Rod Bearing Set

    Crown Automotive Connecting Rod Bearing Set

    Crown Automotive Connecting Rod Bearing Set

    From $26.99

    19
     Crown Automotive Camshaft Plug

    Crown Automotive Camshaft Plug

    Crown Automotive Camshaft Plug

    From $1.99

    22
     Omix-ADA Camshafts

    Omix-ADA Camshafts

    Omix-Ada Camshaft

    From $123.29

    On Sale
    22
     Crown Automotive Camshafts

    Crown Automotive Camshafts

    Crown Automotive Camshaft

    From $104.99

    23
     Omix-ADA Camshaft Bearings

    Omix-ADA Camshaft Bearings

    Omix-Ada Camshaft Bearing

    From $12.59

    On Sale
    24
     Crown Automotive Intake Valve

    Crown Automotive Intake Valve

    Crown Automotive Intake Valve

    From $10.99

    25
     Crown Automotive Exhaust Valve

    Crown Automotive Exhaust Valve

    Crown Automotive Exhaust Valve

    From $10.99

    26
     Omix-ADA Intake Valve Stem Seals

    Omix-ADA Intake Valve Stem Seals

    Omix-Ada Intake Valve Stem Seal

    From $5.39

    On Sale
    27
     Crown Automotive Valve Spring Retainer Keeper

    Crown Automotive Valve Spring Retainer Keeper

    Crown Automotive Valve Spring Retainer Keeper

    From $0.99

    28
     Crown Automotive Rocker Arms

    Crown Automotive Rocker Arms

    Crown Automotive Rocker Arms

    From $15.99

    28
     Omix-ADA Rocker Arms

    Omix-ADA Rocker Arms

    Omix-Ada Rocker Arm

    From $11.69

    On Sale
    29
     Crown Automotive Rocker Arm Pivots

    Crown Automotive Rocker Arm Pivots

    Crown Automotive Rocker Arm Pivots

    From $1.99

    29
     Omix-ADA Rocker Arm Pivots

    Omix-ADA Rocker Arm Pivots

    Omix-Ada Rocker Arm Pivot

    From $2.69

    On Sale
    30
     Omix-ADA Rocker Arm Bridges

    Omix-ADA Rocker Arm Bridges

    Omix-Ada Rocker Arm Bridge

    From $3.59

    On Sale
    30
     Crown Automotive Rocker Arm Pivot Bridge

    Crown Automotive Rocker Arm Pivot Bridge

    Crown Automotive Rocker Arm Pivot Bridge

    From $1.99

    32
     Crown Automotive Rocker Arm Pivot Bolt

    Crown Automotive Rocker Arm Pivot Bolt

    Crown Automotive Rocker Arm Pivot Bolt
    3.0 3.0 (1)

    From $0.99

    33
     Crown Automotive Valve Springs

    Crown Automotive Valve Springs

    Crown Automotive Valve Spring

    From $0.99

    On Sale
    34
     Crown Automotive Valve Lifter

    Crown Automotive Valve Lifter

    Crown Automotive Valve Lifter

    From $19.99

    34
     Omix-ADA Valve Lifters

    Omix-ADA Valve Lifters

    Omix-Ada Valve Lifter

    From $26.99

    On Sale
    35
     Crown Automotive Push Rod

    Crown Automotive Push Rod

    Crown Automotive Push Rod

    From $1.99

    On Sale
    35
     Omix-ADA Push Rods

    Omix-ADA Push Rods

    Omix-Ada Push Rod

    From $1.79

    On Sale
    36
     Omix-ADA Timing Chain Covers

    Omix-ADA Timing Chain Covers

    Omix-Ada Timing Chain Cover

    From $100.79

    On Sale
    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

    37
     Omix-ADA Timing Cover Gasket Sets

    Omix-ADA Timing Cover Gasket Sets

    Omix-Ada Timing Cover Gasket Set

    From $15.29

    On Sale
    38
     Crown Automotive Crankshaft Seal

    Crown Automotive Crankshaft Seal

    Crown Automotive Crankshaft Seal

    From $1.99

    On Sale
    38
     Omix-ADA Crankshaft Oil Seals

    Omix-ADA Crankshaft Oil Seals

    Omix-Ada Crankshaft Oil Seal

    From $0.89

    On Sale
    39
     Crown Automotive Timing Cover Gasket

    Crown Automotive Timing Cover Gasket

    Crown Automotive Timing Cover Gasket

    From $12.99

    40
     Crown Automotive Timing Chain Guide

    Crown Automotive Timing Chain Guide

    Crown Automotive Timing Chain Guide

    From $20.99

    40
     Omix-ADA Timing Chain Guides

    Omix-ADA Timing Chain Guides

    Omix-Ada Timing Chain Guide

    From $22.49

    On Sale
    41
     Crown Automotive Engine Timing Chain

    Crown Automotive Engine Timing Chain

    Crown Automotive Engine Timing Chain

    From $118.99

    41
     Crown Automotive Timing Kit

    Crown Automotive Timing Kit

    Crown Automotive Timing Kit

    From $102.99

    41
     Omix-ADA Timing Chains

    Omix-ADA Timing Chains

    Omix-Ada Timing Chain

    From $108.89

    On Sale
    42
     Omix-ADA Camshaft Gear/Sprockets

    Omix-ADA Camshaft Gear/Sprockets

    Omix-Ada Camshaft Gear/Sprocket

    From $114.29

    On Sale
    42
     Crown Automotive Camshaft Sprocket

    Crown Automotive Camshaft Sprocket

    Crown Automotive Camshaft Sprocket

    From $23.99

    43
     Crown Automotive Crankshaft Sprocket

    Crown Automotive Crankshaft Sprocket

    Crown Automotive Crankshaft Sprocket

    From $17.99

    43
     Omix-ADA Crankshaft Gear/Sprockets

    Omix-ADA Crankshaft Gear/Sprockets

    Omix-Ada Crankshaft Gear/Sprocket

    From $11.69

    On Sale
    44
     Crown Automotive Harmonic Balancers

    Crown Automotive Harmonic Balancers

    Crown Automotive Harmonic Balancer

    From $0.99

    45
     Crown Automotive Oil Slingers

    Crown Automotive Oil Slingers

    Crown Automotive Oil Slinger

    From $1.99

    46
     Crown Automotive Clutch Pilot Bearings

    Crown Automotive Clutch Pilot Bearings

    Crown Automotive Pilot Bearing

    From $16.99

    47
     Crown Automotive Flywheel Ring Gear

    Crown Automotive Flywheel Ring Gear

    Crown Automotive Flywheel Ring Gear

    From $23.99

    48
     Crown Automotive Flywheel Assembly

    Crown Automotive Flywheel Assembly

    Crown Automotive Flywheel Assembly

    From $109.99

    50
     Omix-ADA Exhaust Manifolds

    Omix-ADA Exhaust Manifolds

    Omix-Ada Exhaust Manifold

    From $114.29

    On Sale
    50
     RT Off-Road Exhaust Manifolds

    RT Off-Road Exhaust Manifolds

    RT Off-Road Exhaust Manifold

    From $219.99

    51
     Crown Automotive Exhaust Manifold Gaskets

    Crown Automotive Exhaust Manifold Gaskets

    Crown Automotive Exhaust Manifold Gasket

    From $10.99

    52
     Crown Automotive Engine Mounts

    Crown Automotive Engine Mounts

    Crown Automotive Engine Mount
    5.0 5.0 (2)

    From $11.99

    8a
     Crown Automotive Engine Oil Pan Gasket

    Crown Automotive Engine Oil Pan Gasket

    Crown Automotive Engine Oil Pan Gasket
    5.0 5.0 (1)

    From $1.99

    Omix-ADA Engine Mounts

    Omix-Ada Engine Mount

    From $12.59

    On Sale

    Crown Automotive Transmission Mounts

    Crown Automotive Transmission Mount

    From $10.99

    Omix-ADA Exhaust Manifold Kits

    Omix-Ada Exhaust Manifold Kit

    From $100.79

    On Sale

    Omix-ADA Radiator Hoses

    Omix-Ada Radiator Hose

    From $10.79

    On Sale

    Crown Automotive Valve Cover Gasket

    Crown Automotive Valve Cover Gasket
    4.0 4.0 (1)

    From $0.99

    On Sale

    Omix-ADA Valve Cover Nuts

    Omix-Ada Valve Cover Nut

    From $2.69

    On Sale

    Omix-ADA Automatic Transmission Rebuild Kits

    Omix-Ada Automatic Transmission Rebuild Kits

    From $250.19

    On Sale

    Omix-ADA Connecting Rod Bearings

    Omix-Ada Connecting Rod Bearing

    From $10.79

    On Sale

    Omix-ADA Intake Valves

    Omix-Ada Intake Valve

    From $12.59

    On Sale

    Crown Automotive Oil Pressure Sending Unit

    Crown Automotive Oil Pressure Sending Unit
    5.0 5.0 (2)

    From $11.99

    Omix-ADA Exhaust Valves

    Omix-Ada Exhaust Valve

    From $10.79

    On Sale

    Crown Automotive Exhaust Manifolds

    Crown Automotive Exhaust Manifolds

    From $101.99

    Omix-ADA Valve Cover Gasket Kits

    Omix-Ada Valve Cover Gasket
    5.0 5.0 (1)

    From $12.59

    On Sale

    Omix-ADA Pilot Bushings

    Omix-Ada Pilot Bushing

    From $3.59

    On Sale

    Omix-ADA PCV Valves

    Omix-Ada PCV Valve

    From $15.29

    On Sale

    Omix-ADA Valve Covers

    Omix-Ada Valve Cover
    5.0 5.0 (1)

    From $115.94

    On Sale

    Crown Automotive Camshaft Gear

    Crown Automotive Camshaft Gear

    From $118.99

    Crown Automotive Engine Head Bolts

    Crown Automotive Cylinder Head Stud Kit
    5.0 5.0 (1)

    From $1.99

    Crown Automotive Timing Chain Tensioner

    Crown Automotive Timing Chain Tensioner

    From $24.99

    Crown Automotive Crankshaft Pulley

    Crown Automotive Crankshaft Pulley

    From $14.99

    Omix-ADA Engine Gasket Sets

    Omix-Ada Engine Gasket Set

    From $110.69

    On Sale

    Crown Automotive Crankshaft Main Bearing Set

    Crown Automotive Crankshaft Main Bearing Set

    From $102.99

    Crown Automotive Head Gasket Set

    Crown Automotive Head Gasket Set

    From $138.99

    Crown Automotive Auto Trans Flexplate

    Crown Automotive Auto Trans Flexplate

    From $112.99

    Omix-ADA Oil Pans

    Omix-Ada Oil Pan

    From $107.99

    On Sale

    Crown Automotive Engine Upper Gasket Set

    Crown Automotive Engine Upper Gasket Set
    5.0 5.0 (1)

    From $10.99

    Crown Automotive Camshaft Bearing Set

    Crown Automotive Camshaft Bearing Set

    From $16.99

    Omix-ADA Timing Chain Kits

    Omix-Ada Timing Kit

    From $1,074.59

    On Sale

    Crown Automotive PCV Valve

    Crown Automotive PCV Valve
    5.0 5.0 (1)

    From $1.99

    Omix-ADA Flex Plates

    Omix-Ada Automatic Flywheels

    From $101.69

    On Sale

    Omix-ADA Oil Pan Drain Plugs

    Omix-Ada Oil Pan Drain Plug
    5.0 5.0 (1)

    From $1.79

    On Sale