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- Engine Parts
- MJ Comanche 4.0L 6 Cylinder Engine
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.
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Omix-ADA Engine Valve Cover Gaskets
Omix-Ada Engine Valve Cover GasketFrom $26.99
- Valve Cover Gasket
- California Residents: WARNING
3
3
Crown Automotive Head Gasket
Crown Automotive Head GasketFrom $10.99
- Head Gasket
- California Residents: WARNING
5
Crown Automotive Engine Lower Gasket Set
Crown Automotive Engine Lower Gasket SetFrom $20.99
- Engine Lower Gasket Set
- California Residents: WARNING
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Crown Automotive Oil Filter
Crown Automotive Oil FilterFrom $11.99
- Engine Oil Filter
- California Residents: WARNING
7
Crown Automotive Engine Oil Pump
Crown Automotive Engine Oil PumpFrom $106.99
- Engine Oil Pump
- California Residents: WARNING
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Crown Automotive Engine Oil Pump Screen
Crown Automotive Engine Oil Pump ScreenFrom $57.99
- Engine Oil Pump Screen
- California Residents: WARNING
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Crown Automotive Engine Oil Pans
Crown Automotive Engine Oil Pan
5.0
5.0
(1)
From $104.99
- Engine Oil Pan
- California Residents: WARNING
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Crown Automotive Oil Filler Cap
Crown Automotive Oil Filler CapFrom $3.99
- Oil Filler Cap
- California Residents: WARNING
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Crown Automotive Valve Cover Grommet
Crown Automotive Valve Cover Grommet
5.0
5.0
(1)
From $0.99
- Valve Cover Grommet
- California Residents: WARNING
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Crown Automotive Engine Piston And Pin
Crown Automotive Engine Piston And PinFrom $237.99
- Engine Piston And Pin
- No Connecting Rod Included
- California Residents: WARNING
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Crown Automotive Engine Piston Ring Set
Crown Automotive Engine Piston Ring SetFrom $102.99
- Engine Piston Ring Set
- California Residents: WARNING
13
Omix-ADA Piston Ring Sets
Omix-Ada Piston Ring SetFrom $101.99
- Piston Ring Set
- California Residents: WARNING
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Crown Automotive Connecting Rod
Crown Automotive Connecting RodFrom $32.99
- Connecting Rod
- California Residents: WARNING
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Crown Automotive Connecting Rod Bolt
Crown Automotive Connecting Rod BoltFrom $3.99
- Connecting Rod Bolt
- California Residents: WARNING
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Omix-ADA Main Engine Bearing Sets
Omix-Ada Main Engine Bearing SetFrom $110.99
- Main Engine Bearing Set
- California Residents: WARNING
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Crown Automotive Crankshaft Bearing
Crown Automotive Crankshaft BearingFrom $9.99
- Oversized crankshaft thrust bearing
- .010 inch
- California Residents: WARNING
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Crown Automotive Connecting Rod Bearing Set
Crown Automotive Connecting Rod Bearing SetFrom $26.99
- Connecting Rod Bearing Set
- California Residents: WARNING
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Crown Automotive Camshaft Plug
Crown Automotive Camshaft PlugFrom $1.99
- Camshaft Plug
- 2-9/64 inch diameter
- Camshaft Plug
- California Residents: WARNING
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Crown Automotive Camshafts
Crown Automotive CamshaftFrom $104.99
- Camshaft
- California Residents: WARNING
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Omix-ADA Camshaft Bearings
Omix-Ada Camshaft BearingFrom $13.99
- Camshaft Bearings
- California Residents: WARNING
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Crown Automotive Intake Valve
Crown Automotive Intake ValveFrom $10.99
- Intake Valve
- California Residents: WARNING
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Crown Automotive Exhaust Valve
Crown Automotive Exhaust ValveFrom $10.99
- Exhaust Valve
- California Residents: WARNING
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Omix-ADA Intake Valve Stem Seals
Omix-Ada Intake Valve Stem SealFrom $5.99
- Intake Valve Stem Seal
- California Residents: WARNING
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Crown Automotive Valve Spring Retainer Keeper
Crown Automotive Valve Spring Retainer KeeperFrom $0.99
- Valve Spring Retainer Keeper
- 6-2 with Valve rotators
- Exhaust valves
- California Residents: WARNING
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Crown Automotive Rocker Arms
Crown Automotive Rocker ArmsFrom $13.64
- Rocker Arm
- California Residents: WARNING
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Omix-ADA Rocker Arm Pivots
Omix-Ada Rocker Arm PivotFrom $2.99
- Rocker Arm Pivot
- California Residents: WARNING
29
Crown Automotive Rocker Arm Pivots
Crown Automotive Rocker Arm PivotsFrom $1.99
- Rocker Arm Pivot
- California Residents: WARNING
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Omix-ADA Rocker Arm Bridges
Omix-Ada Rocker Arm BridgeFrom $3.99
- Rocker Arm Bridge
- California Residents: WARNING
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Crown Automotive Rocker Arm Pivot Bolt
Crown Automotive Rocker Arm Pivot BoltFrom $0.99
- Rocker Arm Pivot Bolt
- California Residents: WARNING
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Crown Automotive Valve Springs
Crown Automotive Valve SpringFrom $0.99
- Valve Spring
- California Residents: WARNING
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Crown Automotive Valve Lifter
Crown Automotive Valve LifterFrom $12.99
- Valve Lifter
- Sold individually
- California Residents: WARNING
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Crown Automotive Push Rod
Crown Automotive Push RodFrom $1.94
- Push Rod
- Sold individually
- California Residents: WARNING
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Omix-ADA Timing Chain Covers
Omix-Ada Timing Chain CoverFrom $111.99
- Timing Chain Cover
- California Residents: WARNING
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Omix-ADA Timing Cover Gasket Sets
Omix-Ada Timing Cover Gasket SetFrom $16.99
- Timing Cover Gasket Set
- California Residents: WARNING
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Crown Automotive Crankshaft Seal
Crown Automotive Crankshaft SealFrom $1.99
- Crankshaft Seal
- California Residents: WARNING
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Omix-ADA Crankshaft Oil Seals
Omix-Ada Crankshaft Oil SealFrom $0.99
- Crankshaft Oil Seal
- California Residents: WARNING
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Crown Automotive Timing Cover Gasket
Crown Automotive Timing Cover GasketFrom $12.99
- Timing Cover Gasket
- California Residents: WARNING
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Crown Automotive Timing Chain Guide
Crown Automotive Timing Chain GuideFrom $20.99
- Timing Chain Guide
- California Residents: WARNING
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Omix-ADA Timing Chain Guides
Omix-Ada Timing Chain GuideFrom $24.99
- Timing Chain Guide
- California Residents: WARNING
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Omix-ADA Timing Chains
Omix-Ada Timing ChainFrom $103.99
- Timing Chain
- California Residents: WARNING
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Crown Automotive Timing Kit
Crown Automotive Timing KitFrom $102.99
- Timing Kit
- California Residents: WARNING
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Crown Automotive Engine Timing Chain
Crown Automotive Engine Timing ChainFrom $118.99
- Engine Timing Chain
- California Residents: WARNING
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Crown Automotive Camshaft Sprocket
Crown Automotive Camshaft SprocketFrom $23.99
- Camshaft Sprocket
- California Residents: WARNING
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Omix-ADA Camshaft Gear/Sprockets
Omix-Ada Camshaft Gear/SprocketFrom $126.99
- Camshaft Gear/Sprocket
- California Residents: WARNING
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Omix-ADA Crankshaft Gear/Sprockets
Omix-Ada Crankshaft Gear/SprocketFrom $12.99
- Crankshaft Gear/Sprocket
- California Residents: WARNING
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Crown Automotive Harmonic Balancers
Crown Automotive Harmonic BalancerFrom $0.99
- Crown Automotive Harmonic Balancer
- California Residents: WARNING
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Crown Automotive Oil Slingers
Crown Automotive Oil SlingerFrom $1.99
- Oil Slinger
- NP231, NP242 transfer case
- California Residents: WARNING
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Crown Automotive Clutch Pilot Bearings
Crown Automotive Pilot BearingFrom $16.99
- Pilot Bearing
- California Residents: WARNING
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Crown Automotive Flywheel Ring Gear
Crown Automotive Flywheel Ring GearFrom $23.99
- Flywheel Ring Gear
- California Residents: WARNING
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Crown Automotive Flywheel Assembly
Crown Automotive Flywheel AssemblyFrom $109.99
- Flywheel Assembly
- Manual Transmission
- California Residents: WARNING
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Omix-ADA Exhaust Manifolds
Omix-Ada Exhaust ManifoldFrom $100.99
- Exhaust Manifold
- State Legal: 49 State
- In California, this part may not be used upon a highway and may only be used for race purposes
- California Residents: WARNING
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RT Off-Road Exhaust Manifolds
RT Off-Road Exhaust ManifoldFrom $258.99
- Exhaust Manifold
- California Residents: WARNING
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Crown Automotive Exhaust Manifold Gaskets
Crown Automotive Exhaust Manifold GasketFrom $10.99
- Exhaust Manifold Gasket
- California Residents: WARNING
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Crown Automotive Engine Mounts
Crown Automotive Engine Mount
5.0
5.0
(2)
From $11.99
- Engine Mount
- California Residents: WARNING
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Crown Automotive Engine Oil Pan Gasket
Crown Automotive Engine Oil Pan GasketFrom $1.99
- Engine Oil Pan Gasket
- California Residents: WARNING
Omix-ADA Engine Gasket Sets
Omix-Ada Engine Gasket SetFrom $100.99
- Engine Gasket Set
- California Residents: WARNING
Crown Automotive Timing Chain Tensioner
Crown Automotive Timing Chain TensionerFrom $24.99
- Timing Chain Tensioner
- California Residents: WARNING
Crown Automotive Intake Manifold Gaskets
Crown Automotive Intake Manifold GasketFrom $1.99
- Intake Manifold Gasket
- California Residents: WARNING
Omix-ADA Valve Covers
Omix-Ada Valve Cover
3.0
3.0
(2)
From $115.94
- Valve Cover
- California Residents: WARNING
Crown Automotive PCV Valve
Crown Automotive PCV ValveFrom $1.99
- Crankcase PCV Valve
- California Residents: WARNING
Omix-ADA Radiator Hoses
Omix-Ada Radiator HoseFrom $11.99
- Radiator Hose
- California Residents: WARNING
Omix-ADA Connecting Rod Bearings
Omix-Ada Connecting Rod BearingFrom $10.99
- Connecting Rod Bearings
- California Residents: WARNING
Omix-ADA Flex Plates
Omix-Ada Automatic FlywheelsFrom $112.99
- Replacement flex plates
- Omix-ADA proudly offers high-quality replacement parts for your Jeep vehicle that always meet or exceed OE standards
- California Residents: WARNING
Omix-ADA Timing Chain Tensioners
Omix-Ada Timing Chain TensionerFrom $110.99
- Timing Chain Tensioner
- California Residents: WARNING
Crown Automotive Oil Pressure Sending Unit
Crown Automotive Oil Pressure Sending UnitFrom $11.99
- Oil Pressure Sending Unit
- California Residents: WARNING
Crown Automotive Crankshaft Main Bearing Set
Crown Automotive Crankshaft Main Bearing SetFrom $102.99
Omix-ADA Pilot Bushings
Omix-Ada Pilot BushingFrom $10.99
- Pilot Bushing
- California Residents: WARNING
Crown Automotive Timing Covers
Crown Automotive Timing CoverFrom $272.99
- Timing Cover
- California Residents: WARNING
Omix-ADA Automatic Transmission Rebuild Kits
Omix-Ada Automatic Transmission Rebuild KitsFrom $277.99
- Automatic Transmission Rebuild Kit
- California Residents: WARNING
Crown Automotive Transmission Mounts
Crown Automotive Transmission MountFrom $10.99
- Transmission Mount
- California Residents: WARNING
Crown Automotive Crankshaft Pulley
Crown Automotive Crankshaft Pulley
1.0
1.0
(1)
From $14.99
- Crankshaft Pulley
- For V-Belt
- No A/C
- California Residents: WARNING
Crown Automotive Exhaust Valve Guide
Crown Automotive Exhaust Valve GuideFrom $5.99
- Exhaust Valve Guide
- California Residents: WARNING
Crown Automotive Valve Cover Gasket
Crown Automotive Valve Cover Gasket
4.0
4.0
(1)
From $0.99
- Valve Cover Gasket
- California Residents: WARNING
Omix-ADA Valve Cover Gasket Kits
Omix-Ada Valve Cover GasketFrom $13.99
- Valve Cover Gasket
- California Residents: WARNING
Crown Automotive Engine Upper Gasket Set
Crown Automotive Engine Upper Gasket SetFrom $10.99
- Engine Upper Gasket Set
- California Residents: WARNING
Omix-ADA Timing Chain Kits
Omix-Ada Timing KitFrom $100.99
- Timing Kit
- California Residents: WARNING
Omix-ADA Exhaust Valves
Omix-Ada Exhaust ValveFrom $10.99
- Exhaust Valve
- California Residents: WARNING
Crown Automotive Oil Hole Plug
Crown Automotive Oil Hole PlugFrom $1.99
- Oil Hole Plug
- California Residents: WARNING
Omix-ADA Rocker Arm Kits
Omix-Ada Rocker Arm KitFrom $29.99
- Rocker Arm Kit
- California Residents: WARNING
