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- Replacement Parts
- Engine Parts
- YJ Wrangler 4.2L 6 cylinder Engine Parts
Jeep YJ Wrangler 4.2L 6 cylinder Engine Parts
Make Sure It Fits Your Vehicle
Factory style replacement 4.2L 258 6 cylinder engine parts for your 1987-95 YJ Wrangler. There's a lot to love about your YJ, including the occasionally controversial square headlights. However, it pays to remember your vehicle's series started way back in model year 1987. Jeep Wrangler value depends on more than quirky vintage charm: it depends on a clean engine. Keep your pre-1991 4.2L inline 6 in good condition with this full selection of parts.
Everything in One Place
Here at 4 Wheel Parts, we listened to customer requests and came up with a simple-to-navigate catalog. Simply take a look at the Jeep 4.2 engine diagram, and then click the number next to the part you need. If you don't see it right away, perform a search or browse the items this category. Pumps, gaskets, cylinder heads, timing chains, valve lifters, engine mounts and much more: All of the YJ engine parts you need are right here.
Quality and Value
Good quality and low prices matter for everything you need, whether it's a 1989 Jeep Wrangler 4.2 intake manifold or a replacement YJ valve cover gasket. That's why we've filled this page with parts that meet or exceed the OEM specs for every 1987-1990 Jeep Wrangler 4.2 engine. In addition, we're completely committed to our price guarantee. We offer one of the best price-match program available anywhere: Order now, and take up to 90 days to find a lower advertised price.
Why Rebuild Your 4.2L YJ Engine?
As many Jeepers have discovered, doing engine work is one of the toughest and most rewarding projects you can undertake. Whether you're giving a longtime off-roading companion some necessary maintenance or fixing up a recent boneyard acquisition, nothing is quite like feeling a defunct block roar back to life after hours of exacting work. Build your YJ back to its original glory with OEM parts, or throw in a few upgrades from our selection of aftermarket components. Qualified orders over $99 get free ground shipping, so order everything you need and get started on your project as soon as possible.
140 Product Groups
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From $136.99
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On Sale
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Crown Automotive Valve Covers
Crown Automotive Valve CoverFrom $112.99
- Valve Cover
- Plastic
- Grommets sold separately
- California Residents: WARNING
From $112.99
4.0
4.0
(4)
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Crown Automotive Valve Cover Gasket
Crown Automotive Valve Cover GasketFrom $10.99
- Valve Cover Gasket
- California Residents: WARNING
From $10.99
4.0
4.0
(3)
2
Omix-ADA Valve Cover Gasket Kits
Omix-Ada Valve Cover GasketFrom $14.99
- Valve Cover Gasket
- California Residents: WARNING
From $14.99
5.0
5.0
(1)
On Sale
3
Crown Automotive Head Gasket
Crown Automotive Head GasketFrom $15.99
- Head Gasket
- California Residents: WARNING
From $15.99
4
From $136.99
On Sale
5
Crown Automotive Engine Lower Gasket Set
Crown Automotive Engine Lower Gasket SetFrom $26.99
- Engine Lower Gasket Set
- California Residents: WARNING
From $26.99
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From $10.99
On Sale
7
Crown Automotive Engine Oil Pump
Crown Automotive Engine Oil PumpFrom $107.99
- Engine Oil Pump
- California Residents: WARNING
From $107.99
7
From $109.99
On Sale
7
Crown Automotive Engine Oil Pump Screen
Crown Automotive Engine Oil Pump ScreenFrom $71.99
- Engine Oil Pump Screen
- California Residents: WARNING
From $71.99
8
Omix-ADA Oil Pan Gaskets
Omix-Ada Oil Pan GasketFrom $10.99
- Oil Pan Gasket
- California Residents: WARNING
From $10.99
On Sale
8
Crown Automotive Engine Oil Pans
Crown Automotive Engine Oil PanFrom $105.99
- Engine Oil Pan
- California Residents: WARNING
From $105.99
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From $130.99
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Crown Automotive Oil Filler Cap
Crown Automotive Oil Filler CapFrom $10.99
- Oil Filler Cap
- California Residents: WARNING
From $10.99
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From $13.99
On Sale
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Crown Automotive Oil Pan Drain Plug
Crown Automotive Oil Pan Drain PlugFrom $10.99
- Oil Pan Drain Plug
- California Residents: WARNING
From $10.99
10
Omix-ADA Oil Pan Drain Plugs
Omix-Ada Oil Pan Drain PlugFrom $1.99
- Oil Pan Drain Plug
- California Residents: WARNING
From $1.99
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5.0
(6)
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11
Crown Automotive PCV Valve
Crown Automotive PCV ValveFrom $10.99
- Crankcase PCV Valve
- California Residents: WARNING
From $10.99
5.0
5.0
(5)
11
Omix-ADA Valve Cover Grommets
Omix-Ada Valve Cover GrommetFrom $1.99
- Valve Cover Grommet
- California Residents: WARNING
From $1.99
On Sale
11
Crown Automotive PCV Valve Gasket
Crown Automotive PCV Valve GasketFrom $8.99
- PCV Valve Gasket
- To valve spring cover
- California Residents: WARNING
From $8.99
11
From $1.99
5.0
5.0
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From $15.99
On Sale
12
Crown Automotive Engine Piston And Pin
Crown Automotive Engine Piston And PinFrom $103.99
- Engine Piston And Pin
- No Connecting Rod Included
- California Residents: WARNING
From $103.99
12
From $17.99
On Sale
13
Omix-ADA Piston Ring Sets
Omix-Ada Piston Ring SetFrom $109.99
- Piston Ring Set
- California Residents: WARNING
From $109.99
On Sale
13
Crown Automotive Engine Piston Ring Set
Crown Automotive Engine Piston Ring SetFrom $101.99
- Engine Piston Ring Set
- California Residents: WARNING
From $101.99
14
Crown Automotive Connecting Rod
Crown Automotive Connecting RodFrom $57.99
- Connecting Rod
- California Residents: WARNING
From $57.99
4.0
4.0
(1)
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Crown Automotive Connecting Rod Bolt
Crown Automotive Connecting Rod BoltFrom $6.99
- Connecting Rod Bolt
- California Residents: WARNING
From $6.99
16
Omix-ADA Main Engine Bearing Sets
Omix-Ada Main Engine Bearing SetFrom $109.99
- Main Engine Bearing Set
- California Residents: WARNING
From $109.99
On Sale
16
Crown Automotive Crankshaft Main Bearing Set
Crown Automotive Crankshaft Main Bearing SetFrom $103.99
From $103.99
17
Crown Automotive Crankshaft Bearing
Crown Automotive Crankshaft BearingFrom $15.99
- Oversized crankshaft thrust bearing
- .010 inch
- California Residents: WARNING
From $15.99
17
From $19.99
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Omix-ADA Connecting Rod Bearings
Omix-Ada Connecting Rod BearingFrom $10.99
- Connecting Rod Bearings
- California Residents: WARNING
From $10.99
On Sale
18
Crown Automotive Connecting Rod Bearing Set
Crown Automotive Connecting Rod Bearing SetFrom $105.99
- Connecting Rod Bearing Set
- California Residents: WARNING
From $105.99
18
Crown Automotive Connecting Rod Bearing
Crown Automotive Connecting Rod BearingFrom $13.99
- Connecting Rod Bearing
- California Residents: WARNING
From $13.99
19
Crown Automotive Camshaft Expansion Plug
Crown Automotive Camshaft Expansion PlugFrom $8.99
- Camshaft Expansion Plug
- 1-1/2 inch diameter
- California Residents: WARNING
From $8.99
20
Crown Automotive Oil Hole Plug
Crown Automotive Oil Hole PlugFrom $8.99
- Oil Hole Plug
- California Residents: WARNING
From $8.99
21
From $21.99
21
Omix-ADA Crankshaft Gear/Sprockets
Omix-Ada Crankshaft Gear/SprocketFrom $109.99
- Crankshaft Gear/Sprocket
- California Residents: WARNING
From $109.99
On Sale
22
Omix-ADA Pilot Bushings
Omix-Ada Pilot BushingFrom $10.99
- Pilot Bushing
- California Residents: WARNING
From $10.99
On Sale
22
Crown Automotive Clutch Pilot Bearings
Crown Automotive Pilot BearingFrom $10.99
- Pilot Bearing
- California Residents: WARNING
From $10.99
23
Crown Automotive Flywheel Ring Gear
Crown Automotive Flywheel Ring GearFrom $32.99
- Flywheel Ring Gear
- California Residents: WARNING
From $32.99
23
Omix-ADA Flywheel Ring Gears
Omix-Ada Flywheel Ring GearFrom $31.99
- Standard Shift Flywheel Ring Gear
- California Residents: WARNING
From $31.99
On Sale
24
Omix-ADA Flywheels
Omix-Ada Flywheel Manual TransmissionFrom $136.99
- Standard Shift Flywheel
- California Residents: WARNING
From $136.99
On Sale
24
Crown Automotive Flywheel Assembly
Crown Automotive Flywheel AssemblyFrom $132.99
- Flywheel Assembly
- Manual Transmission
- California Residents: WARNING
From $132.99
24
Crown Automotive Auto Trans Flexplate
Crown Automotive Auto Trans FlexplateFrom $105.99
- Automatic Transmission Flexplate
- California Residents: WARNING
From $105.99
24
Omix-ADA Flex Plates
Omix-Ada Automatic FlywheelsFrom $136.99
- 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
From $136.99
On Sale
26
Crown Automotive Camshafts
Crown Automotive CamshaftFrom $136.99
- Camshaft
- California Residents: WARNING
From $136.99
27
Crown Automotive Camshaft Bearing Set
Crown Automotive Camshaft Bearing SetFrom $33.99
- Camshaft Bearing Set
- California Residents: WARNING
From $33.99
27
Omix-ADA Camshaft Bearings
Omix-Ada Camshaft BearingFrom $11.99
- Camshaft Bearings
- California Residents: WARNING
From $11.99
On Sale
28
Crown Automotive Intake Valve
Crown Automotive Intake ValveFrom $11.99
- Intake Valve
- California Residents: WARNING
From $11.99
28
From $10.99
On Sale
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Crown Automotive Exhaust Valve
Crown Automotive Exhaust ValveFrom $11.99
- Exhaust Valve
- California Residents: WARNING
From $11.99
29
Omix-ADA Exhaust Valves
Omix-Ada Exhaust ValveFrom $14.99
- Exhaust Valve
- California Residents: WARNING
From $14.99
On Sale
30
Crown Automotive Valve Stem Seal
Crown Automotive Valve Stem SealFrom $0.99
- Valve Stem Seal
- Sold Individually
- California Residents: WARNING
From $0.99
30
Omix-ADA Exhaust/Intake Valve Stem Seals
Omix-Ada Exhaust/Intake Valve Stem SealFrom $1.99
- Exhaust/Intake Valve Stem Seal
- California Residents: WARNING
From $1.99
On Sale
30
Omix-ADA Intake Valve Stem Seals
Omix-Ada Intake Valve Stem SealFrom $5.99
- Intake Valve Stem Seal
- California Residents: WARNING
From $5.99
On Sale
31
Crown Automotive Valve Spring Retainer Keeper
Crown Automotive Valve Spring Retainer KeeperFrom $1.99
- Valve Spring Retainer Keeper
- 6-2 with Valve rotators
- Exhaust valves
- California Residents: WARNING
From $1.99
32
Crown Automotive Valve Springs
Crown Automotive Valve SpringFrom $10.99
- Valve Spring
- California Residents: WARNING
From $10.99
33
Crown Automotive Rocker Arms
Crown Automotive Rocker ArmsFrom $12.99
- Rocker Arm
- California Residents: WARNING
From $12.99
33
Omix-ADA Rocker Arm Kits
Omix-Ada Rocker Arm KitFrom $109.99
- Rocker Arm Kit
- California Residents: WARNING
From $109.99
On Sale
33
From $6.99
On Sale
34
Omix-ADA Rocker Arm Pivots
Omix-Ada Rocker Arm PivotFrom $2.99
- Rocker Arm Pivot
- California Residents: WARNING
From $2.99
On Sale
34
Crown Automotive Rocker Arm Pivots
Crown Automotive Rocker Arm PivotsFrom $2.99
- Rocker Arm Pivot
- California Residents: WARNING
From $2.99
35
Crown Automotive Rocker Arm Bridges
Crown Automotive Rocker Arm BridgesFrom $9.99
- Rocker Arm Bridge
- California Residents: WARNING
From $9.99
35
Omix-ADA Rocker Arm Bridges
Omix-Ada Rocker Arm BridgeFrom $3.99
- Rocker Arm Bridge
- California Residents: WARNING
From $3.99
On Sale
36
From $1.99
37
Crown Automotive Rocker Arm Pivot Bolt
Crown Automotive Rocker Arm Pivot BoltFrom $1.99
- Rocker Arm Pivot Bolt
- California Residents: WARNING
From $1.99
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3.5
(2)
38
From $11.99
On Sale
38
Crown Automotive Valve Lifter
Crown Automotive Valve LifterFrom $13.99
- Valve Lifter
- Sold individually
- California Residents: WARNING
From $13.99
39
Crown Automotive Push Rod
Crown Automotive Push RodFrom $10.99
- Push Rod
- Sold individually
- California Residents: WARNING
From $10.99
39
From $1.99
On Sale
40
Crown Automotive Timing Covers
Crown Automotive Timing CoverFrom $330.99
- Timing Cover
- California Residents: WARNING
From $330.99
40
Omix-ADA Timing Chain Covers
Omix-Ada Timing Chain CoverFrom $109.99
- Timing Chain Cover
- California Residents: WARNING
From $109.99
On Sale
41
From $16.99
41
Omix-ADA Timing Cover Gasket Sets
Omix-Ada Timing Cover Gasket SetFrom $16.99
- Timing Cover Gasket Set
- California Residents: WARNING
From $16.99
On Sale
42
Omix-ADA Crankshaft Oil Seals
Omix-Ada Crankshaft Oil SealFrom $0.99
- Crankshaft Oil Seal
- California Residents: WARNING
From $0.99
On Sale
42
Crown Automotive Crankshaft Seal
Crown Automotive Crankshaft SealFrom $10.99
- Crankshaft Seal
- California Residents: WARNING
From $10.99
42
Omix-ADA Timing Cover Oil Seals
Omix-Ada Timing Cover Oil SealFrom $14.99
- Timing Cover Oil Seal
- California Residents: WARNING
From $14.99
On Sale
43
Crown Automotive Timing Cover Gasket
Crown Automotive Timing Cover GasketFrom $10.99
- Timing Cover Gasket
- California Residents: WARNING
From $10.99
44
Crown Automotive Engine Timing Chain
Crown Automotive Engine Timing ChainFrom $133.99
- Engine Timing Chain
- California Residents: WARNING
From $133.99
44
Omix-ADA Timing Chains
Omix-Ada Timing ChainFrom $109.99
- Timing Chain
- California Residents: WARNING
From $109.99
On Sale
45
Crown Automotive Camshaft Sprocket
Crown Automotive Camshaft SprocketFrom $33.99
- Camshaft Sprocket
- California Residents: WARNING
From $33.99
45
Omix-ADA Camshaft Gear/Sprockets
Omix-Ada Camshaft Gear/SprocketFrom $136.99
- Camshaft Gear/Sprocket
- California Residents: WARNING
From $136.99
On Sale
46
Crown Automotive Timing Kit
Crown Automotive Timing KitFrom $105.99
- Timing Kit
- California Residents: WARNING
From $105.99
4.0
4.0
(3)
46
Omix-ADA Timing Chain Kits
Omix-Ada Timing KitFrom $1,048.99
- Timing Kit
- California Residents: WARNING
From $1,048.99
On Sale
47
Crown Automotive Harmonic Balancers
Crown Automotive Harmonic BalancerFrom $103.99
- Crown Automotive Harmonic Balancer
- California Residents: WARNING
From $103.99
47
Omix-ADA Crankshaft Pulley And Dampers
Omix-Ada Crankshaft Pulley And DamperFrom $127.99
- Crankshaft Pulley And Damper
- California Residents: WARNING
From $127.99
On Sale
48
Crown Automotive Oil Slingers
Crown Automotive Oil SlingerFrom $1.99
- Oil Slinger
- NP231, NP242 transfer case
- California Residents: WARNING
From $1.99
49
From $111.99
5.0
5.0
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51
Crown Automotive Exhaust Manifold Gaskets
Crown Automotive Exhaust Manifold GasketFrom $10.99
- Exhaust Manifold Gasket
- California Residents: WARNING
From $10.99
51
Omix-ADA Exhaust Manifold Gasket Sets
Omix-Ada Exhaust Manifold Gasket SetFrom $10.99
- Exhaust Manifold Gasket Set
- California Residents: WARNING
From $10.99
4.0
4.0
(18)
On Sale
52
Crown Automotive Engine Mounts
Crown Automotive Engine MountFrom $11.99
- Engine Mount
- California Residents: WARNING
From $11.99
3.8
3.8
(50)
52
From $11.99
On Sale
52
From $133.99
4.5
4.5
(6)
53
Crown Automotive Transmission Mounts
Crown Automotive Transmission MountFrom $11.99
- Transmission Mount
- California Residents: WARNING
From $11.99
5.0
5.0
(5)
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Daystar Torque Arm Bushing
Daystar Torque Arm BushingFrom $13.01
- Made from polyurethane
- Resistant to vehicle fluids and road grime
- Two required
- Limited lifetime warranty
- Sold individually
- California Residents: WARNING
From $13.01
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