Jeep Comanche 4.0L Engines
from £850 to £3,200
Rebuilt units from £1,450 · Common codes: ERH, EPE, HAM4.0T5LYX6, HAM4.0T5LAB9
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Jeep Comanche Engine Replacement - Compare Prices & Save
Get quotes today from trusted UK Jeep Comanche engine specialists. Compare prices on reconditioned, rebuilt and used engines - supply & fit available.
Supply & Fit Available
12-Month Warranty
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100+ Suppliers
Jeep Comanche 2.5L Engines
from £650 to £2,100
Rebuilt units from £950 · Common codes: EPE, AMC2.5, 2.5TBI
Jeep Comanche Rare Engine Units
from £1,200 to £4,500
Rebuilt units from £1,850 · Common codes: J8S-814, GM2.8V6, LR2
Instant engine replacement quote - 100% free, no obligation
Engine replacement near me - UK-wide specialist network
Compare reconditioned, rebuilt & used engine prices
Supply & fit available - parts and labour from vetted specialistsInstant engine replacement quote - 100% free, no obligationEngine replacement near me - UK-wide specialist networkCompare reconditioned, rebuilt & used engine pricesSupply & fit available - parts and labour from vetted specialistsHow It Works
3 Simple Steps3 Simple Stepsto Finding the Best Jeep Comanche Replacement Engineto Finding the Best Jeep Comanche Replacement Engine
12-Month Warranty
Supply & Fit Available
Nationwide Delivery
Trusted UK Suppliers
Most replacements completed within 3-5 days.
Live UK Engine Market Data
Average Market Prices
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↻ Last updated: 4 Aug 26, 9:26
Customer Reviews
Trusted by Jeep Comanche Owners Across the UK
Rated 4.8 out of 5 by 1,081 verified customers who sourced reconditioned and used Jeep Comanche engines through EngineMarket.
4.8
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“Thanks to EngineMarket, I saved over £1,200 on my engine replacement and got matched with a great local specialist within the hour.”
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“Got three quotes within an hour and chose the best deal easily. The whole process was quick, clear and stress-free.”
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“I wasn't sure what I needed, but they helped me identify the right engine and connected me with a trusted garage.”
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“Thanks to EngineMarket, I saved over £1,200 on my engine replacement and got matched with a great local specialist within the hour.”
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Variants We Cover
Jeep Comanche Engine ReplacementAll Variants Covered
Jeep Comanche 4.0L Renix
HAM4.0T5LYX6 4.0L Petrol
Rebuilt Engines: £1,200-£2,800
Jeep Comanche 4.0L High Output
ERH 4.0L Petrol
Rebuilt Engines: £1,450-£3,200
Jeep Comanche 4.0L Standard
EPE 4.0L Petrol
Rebuilt Engines: £1,100-£2,600
Jeep Comanche 2.5L TBI
EPE 2.5L Petrol
Rebuilt Engines: £950-£2,100
Jeep Comanche 2.5L Base
AMC2.5 2.5L Petrol
Rebuilt Engines: £850-£1,900
Jeep Comanche 2.5L Fuel-Injected
2.5TBI 2.5L Petrol
Rebuilt Engines: £1,000-£2,200
Jeep Comanche 2.8L V6
GM2.8V6 2.8L Petrol
Rebuilt Engines: £1,800-£4,200
Jeep Comanche 2.1L Diesel
J8S-814 2.1L Diesel
Rebuilt Engines: £1,850-£4,500
Jeep Comanche 4.0L Long Block
ERH 4.0L Petrol
Rebuilt Engines: £1,650-£3,400
Jeep Comanche XJ-Compatible 4.0L
ERH 4.0L Petrol
Rebuilt Engines: £1,200-£3,000
Jeep Comanche 4x4 Drivetrain
ERH/EPE 2.5L Petrol
Rebuilt Engines: £1,100-£3,200
Jeep Comanche 2WD Drivetrain
EPE/AMC2.5 4.0L Petrol
Rebuilt Engines: £950-£2,800
Not sure which variant your Jeep Comanche is- Enter your registration number above - we'll identify the exact sub-model, engine code and compatible replacement options instantly.
Comanche
Engine Codes
Jeep Comanche Engine CodesFull Technical Specifications & Replacement Guide
Every engine code fitted to the Jeep Comanche across all generations, with technical specs, compatible variants and trims, known failure points, and average rebuilt prices from UK specialists. Select any engine code to compare quotes.
Petrol Engines
Extracted from detailed petrol and performance engine families across Jeep Comanche variants.
ERH - 4.0L Petrol
Main replacement demand comes from timing-chain, cooling-system and performance thermal-management faults.
Compatible variants
Sport 4.0L HOPioneer 4.0L HOBase 4.0L HO
Avg. rebuilt price
£1,450 - £3,200
Supply only
Technical specifications
- Fuel type
- Petrol
- Engine size
- 4.0L
- Power output
- 173-193 hp
- Years fitted
- 1986-1992
Common failures
- ●Main replacement demand comes from timing-chain, cooling-system and performance thermal-management faults.
- ●Confirm exact engine code and fitment before ordering.
- ●Ask for warranty and supply & fit terms.
Not sure which engine code?
Can't find your engine code- Enter your registration number above - we'll instantly identify the exact unit, its technical specifications, and live replacement prices from UK Jeep Comanche engine specialists. Every rebuilt engine comes with a minimum 12-month unlimited mileage warranty.
Comanche
Common Problems
Jeep Comanche Engine Problems - What It Costs to Fix & When Replacement Makes Sense
The Jeep Comanche's 4.0L straight-six and 2.5L four-cylinder engines are generally robust, but age-related failures like lifter collapse, CPS sensor issues, and cooling system problems drive replacement demand. Every rebuilt engine supplied through EngineMarket includes upgraded internal components designed to address original failure points - plus a...
Jeep Comanche 4.0L Lifter Failure - Why Valvetrain Noise Leads to Engine Replacement
Jeep Comanche 4.0L Lifter Failure
Most affected vehicles
Jeep Comanche 4.0L Renix & HO (1987-1992ERH
Jeep Comanche 4.0L Renix & HO (1987-1992, ERH, HAM4.0T5LYX6, EPE)
Failure mileage range
80,000-120,000 miles
Typical failure window
Root cause
Hydraulic lifter collapse due to oil starvation or wear, causing ticking noise, misfires, and potential valve damage if ignored.
Repair options & estimated costs (UK ranges)
| Repair tier | Dealer price | Specialist price | What it involves | Longevity / suitability |
|---|---|---|---|---|
| Minor - Valve Adjustment & Lifter Inspection | £450 - £750 | £280 - £450 | Remove valve cover, inspect lifters, adjust rockers, replace faulty lifters only | Temporary fix; only viable if caught early before valve damage occurs |
| Intermediate - Cylinder Head Service | £1,200 - £2,100 | £750 - £1,400 | Remove head, replace all lifters, resurface head, new head gasket, reassemble | Addresses root cause; suitable if block is undamaged and mileage <100k |
| Full Replacement - Rebuilt / Reconditioned Engine | £3,500 - £5,800 | £1,450 - £3,200 | Supply & fit rebuilt long block with upgraded lifters, bench-tested, 12-month warranty | Best value for high-mileage engines; eliminates recurring valvetrain issues |
Our recommendation
On a Comanche worth £3,000-£8,000, if the block is sound and mileage is under 100k, a cylinder head service offers good value. For engines over 120k miles or with known block issues, a rebuilt long block is the more reliable long-term solution.
Compare rebuilt 4.0L ERH engine prices for your Jeep ComancheReplacement Engine Options
Jeep Comanche Engine TypesOptions, Costs & What to Expect
Every Jeep Comanche engine type is available through our UK network with typical price ranges based on variant, engine code and budget.
Jeep Comanche Reconditioned Engines (Recon)£1,100 - £2,900((supply only))
Jeep Comanche Rebuilt Engines£1,450 - £3,200((supply only))
Jeep Comanche Used Engines£650 - £1,850((supply only))
Jeep Comanche Remanufactured Engines£1,850 - £4,200((supply only))
Jeep Comanche Refurbished Engines£850 - £2,100((supply only))
Compare Jeep Comanche engine prices with vetted UK suppliers
All engine types include a minimum 12-month unlimited mileage warranty when sourced through EngineMarket. Prices are typical UK market ranges based on historical quote data from our network and depend on exact engine code, variant, mileage and supplier. Use our free comparison tool above - enter your registration to get tailored quotes for your specific Jeep Comanche within hours.
Engine Sizes
Jeep Comanche Engines by SizeFind the Right Displacement for Your Variant
Every displacement fitted to the Jeep Comanche is listed below, with compatible engine codes, production years and common failure notes to help you identify the correct replacement.
The 2.5L AMC four-cylinder powered base Comanche models from 1986-1992, valued for fuel economy but prone to Renix-era ignition sensor failures that often trigger replacement searches.
⚙
Engine Code(s)
EPE, AMC2.5, 2.5TBI
▣
Compatible Models (UK)
Base 2.5L, Pioneer 2.5L, Sport 2.5L
ϟ
Power output
Verified by registration
△
Common Failure Points
Crankshaft position sensor no-start, TBI carbon buildup, timing chain stretch
Production Years: 1986-1992
Compare Jeep Comanche 2.5L petrol engine pricesFuel Type
Jeep Comanche Engines by Fuel Type
Choose your Jeep Comanche engine by fuel type to compare realistic replacement prices, known issues, and compatible UK supply options - from the economical 2.5L petrol to the rare 2.1L diesel import.
Jeep Comanche Petrol Engines
PetrolPetrol engines dominated Comanche production, with the 4.0L straight-six accounting for most replacement enquiries due to its popularity and known failure patterns like lifter collapse and head cracking.
Common Jeep Comanche Petrol Engine Families
- •ERH - 4.0L HO (1991-1992), most sought-after variant for performance restorations
- •HAM4.0T5LYX6 - Renix 4.0L (1987-1990), known for CPS sensor and ignition module issues
- •EPE/AMC2.5 - 2.5L four-cylinder (1986-1992), budget option with TBI reliability concerns
Found In
- •First Generation MJ (1986-1992) - All petrol variants listed above
Known For
- •Robust AMC 4.0L architecture shared with XJ Cherokee for cross-compatibility
- •Renix-era ignition system sensitivity requiring specialist diagnostic knowledge
- •Cylinder head cracking on 0331 casting under sustained high-temperature operation
Typical Petrol Models
- •Base 2.5L / 4.0L
- •Pioneer 2.5L / 4.0L
- •Sport 2.5L / 4.0L Renix / 4.0L HO
1 of 2
Jeep Comanche Petrol Engines
PetrolPetrol engines dominated Comanche production, with the 4.0L straight-six accounting for most replacement enquiries due to its popularity and known failure patterns like lifter collapse and head cracking.
Common Jeep Comanche Petrol Engine Families
- •ERH - 4.0L HO (1991-1992), most sought-after variant for performance restorations
- •HAM4.0T5LYX6 - Renix 4.0L (1987-1990), known for CPS sensor and ignition module issues
- •EPE/AMC2.5 - 2.5L four-cylinder (1986-1992), budget option with TBI reliability concerns
Found In
- •First Generation MJ (1986-1992) - All petrol variants listed above
Known For
- •Robust AMC 4.0L architecture shared with XJ Cherokee for cross-compatibility
- •Renix-era ignition system sensitivity requiring specialist diagnostic knowledge
- •Cylinder head cracking on 0331 casting under sustained high-temperature operation
Typical Petrol Models
- •Base 2.5L / 4.0L
- •Pioneer 2.5L / 4.0L
- •Sport 2.5L / 4.0L Renix / 4.0L HO
Jeep Comanche Diesel Engines
DieselDiesel Comanches were European-market exclusives using the Renault J8S-814 2.1L turbo diesel, creating niche but high-intent replacement searches from UK import owners.
Common Jeep Comanche Diesel Engine Families
- •J8S-814 - 2.1L Renault turbo diesel (European imports), injection pump and turbo wear common
Found In
- •European-spec MJ (1986-1992) - LHD imports occasionally registered in UK
Known For
- •Strong low-end torque suitable for towing and off-road use
- •Limited UK parts availability requiring specialist sourcing or cross-reference to Renault applications
- •Higher replacement costs due to rarity and import logistics for core units
Typical Diesel Models
- •2.1L Diesel European Import
- •2.1L Diesel LHD UK Import
Not sure which fuel type your Jeep Comanche has- Enter your registration number above to instantly identify your engine code, fuel system and compatible replacement options - all backed by a minimum 12-month unlimited mileage warranty from UK Jeep Comanche specialists.
Engine YearsGet quotes for 1986 Jeep Comanche replacement engines →
Jeep Comanche Engines by YearWhat Was Fitted & WhenJeep Comanche Engines by Year - What Was Fitted & When
This section covers all major engine changes across the Comanche's 1986-1992 production timeline, organised so owners can quickly identify their engine and compare rebuilt prices from UK specialists.
⚙Key Changes
- ✓First production year for Jeep Comanche (MJ platform)
- ✓Introduction of 2.5L AMC four-cylinder and 2.8L GM V6 engine options
- ✓Shared architecture with XJ Cherokee established for parts interchangeability
▣Main Engines
EPE/AMC2.5- 2.5L petrol (Base, Pioneer variants)
GM2.8V6/LR2- 2.8L V6 petrol (1986 only, all trims)
▰Popular Models
- •Jeep Comanche Base 2.5L
- •Jeep Comanche Pioneer 2.5L
- •Jeep Comanche Base 2.8L V6
🔧Known For
- ✓2.8L V6 rare and sought by collectors restoring original-spec vehicles
- ✓Early Renix electronics on 2.5L prone to sensor-related no-start issues
- ✓Strong chassis and drivetrain foundation shared with XJ Cherokee
Engine Codes Covered:
EPEAMC2.5GM2.8V6LR2Not sure which year your Jeep Comanche was built- Enter your registration number and we'll identify the exact engine, model year, and compatible replacement options instantly - all backed by a minimum 12-month warranty from UK Jeep Comanche specialists.
FAQ