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Land Rover 508PN Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The naturally aspirated 5.0-litre V8 fitted to the Range Rover and Range Rover Sport. Reconditioned units start from £5,500 , with 330 UK replacement requests recorded for this engine family in 2025 .
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£3,000
Reconditioned from
£5,500
Rebuilt from
£8,000
GB
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Quotes only from vetted UK engine specialists.
Key Specs
Land Rover 508PN - Specifications at a Glance
Engine Code
508PN
Fuel
Petrol
Configuration
5.0L V8, 32-valve DOHC, naturally aspirated
Power Output(s)
375 hp
Years Produced
2009-2022
UK Models Fitted
2 Land Rover models - full list in Compatibility below
2025 UK Replacement Requests
330 (grouped with AJ133 family data)
Replaced
Land Rover 4.4L V8 / Jaguar AJ-V8 4.2
Replaced By
Land Rover 508PS (5.0L Supercharged V8)
Most Common Failure
Timing chain tensioner wear (pre-2013) and coolant crossover leaks
Reconditioned Price Range
£5,500-£9,000 supply-only
Vetted UK specialists for 508PN replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which Land Rover Models Use the 508PN-
The 508PN 5.0L naturally aspirated V8 served as the premium petrol baseline for Land Rover’s flagship SUVs, delivering smooth, linear power and refined cruising capabilities before the supercharged variants and electrified powertrains took over the bulk of the sales volume.
| Model | Generation/Chassis | Badge(s) | Years | Link |
|---|---|---|---|---|
 Land Rover Range Rover | L322 / L405 | 5.0 V8 NA | 2010-2012 (L322), select L405 | |
| Land Rover Range Rover Sport | L320 / L494 | 5.0 V8 NA | 2010-2012 (L320), select L494 |
02
Land Rover Range Rover Sport
Generation/Chassis
L320 / L494
Badge(s)
5.0 V8 NA
Years
2010-2012 (L320), select L494
CROSS-BRAND
508PN is documented across 2 BMW applications spanning Range Rover, Range Rover Sport. Registration lookup confirms the exact suffix before quotes are sent.
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Prices
Land Rover 508PN Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £3,000-£5,500 | £3,910-£6,670 | 3-6 months |
Reconditioned | £5,500-£9,000 | £6,410-£10,170 | 12-24 months |
Rebuilt | £8,000-£12,000 | £8,910-£13,170 | 12-24 months |
The primary cost driver for a 508PN engine replacement is the condition of the timing chain assembly and the cooling system components located in the V8 valley. Units where the early-style hydraulic tensioners have been upgraded to the revised post-2013 specification, and the plastic coolant crossover pipes replaced with aluminium, command a slight premium but carry significantly lower long-term risk. Because this is a complex, all-aluminium V8, a full 508PN rebuild requires specialist machining and precision timing work. See our full reconditioned engine cost guide for a detailed breakdown of what influences your final quote.
Labour Guide
Fitting a 508PN typically takes 14-18 hours at £65/hr (independent) - confirm exact labour when comparing quotes .
Price Factors
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Common Problems
Land Rover 508PN Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the 508PN, based on real-world data and verified failure patterns.
Verified issue focus: Timing chain tensioner wear (pre-2013) and coolant crossover leaks.
1. Timing Chain Tensioner Wear (2009-2012 models)
1. Timing Chain Tensioner Wear (2009-2012 models)
Typical onset:
60k-100k miles
What happens:
The early hydraulic timing chain tensioners on the 5.0L V8 are prone to losing oil pressure, particularly on cold starts or if oil change intervals have been extended. This allows the timing chains to stretch and slap against the plastic guides, producing a distinct rattling noise from the front of the engine. If ignored, the guides can shatter, leading to chain skip and catastrophic valve-to-piston interference.
Repair vs replace:
Updating to the revised, mechanically locking tensioners introduced in 2013 is a known preventative measure. If the rattling has been present for some time and chain stretch is confirmed, a full 508PN engine replacement or comprehensive top-end rebuild is the only reliable solution.
Read more about this issue
2. Coolant Crossover Pipe Leaks
2. Coolant Crossover Pipe Leaks
Typical onset:
70k-120k miles
What happens:
The plastic coolant crossover pipes located deep in the valley of the V8 become brittle with age and intense heat cycling. They eventually crack, leading to rapid, often invisible coolant loss down the back of the engine block, which can quickly escalate to severe overheating and cylinder head warping.
Repair vs replace:
Upgrading to machined aluminium crossover pipes is a standard and highly recommended preventative repair. If overheating has already occurred and caused head gasket failure or block distortion, a full unit replacement is required.
Read more about this issue
3. Water Pump and Thermostat Housing Degradation
3. Water Pump and Thermostat Housing Degradation
Typical onset:
80k-120k miles
What happens:
The composite plastic thermostat housing and the water pump impeller are subject to the same intense V8 valley heat as the crossover pipes. The housing can crack or warp, breaking the seal and causing external coolant leaks, while the water pump bearing can fail, leading to noisy operation and reduced coolant circulation.
Repair vs replace:
Replacing the water pump and upgrading to an aluminium thermostat housing is a routine maintenance item for the 508PN. It rarely necessitates engine replacement on its own unless the resulting coolant loss was ignored until the engine seized.
Read more about this issue
Post-2013 revisions of the 5.0L V8 architecture received updated, significantly more durable timing chain tensioners and revised cooling system routing, making later examples vastly more robust than the early 2009-2012 production run .
Compare rebuilt 508PN prices with the failure already addressed
Engine Variants
How to Confirm You Have the 508PN
The engine code is stamped on a machined pad on the engine block, typically visible on the passenger side near the engine mount, or listed on the VIN plate under the bonnet. The 508PN is frequently confused with its supercharged sibling, the Land Rover 508PS (which features a Roots-type supercharger in the V8 valley and entirely different intake plumbing), or the Jaguar-designated AJ133. While the AJ133 and 508PS share the same 5.0L block architecture, fitting a supercharged engine into a naturally aspirated 508PN chassis requires extensive ECU remapping, different engine mounts, upgraded fuel systems, and altered cooling architecture. Exact code matching is critical to avoid costly installation errors and immediate running faults.
Not sure which revision you have- Enter your registration above - we'll confirm your exact 508PN fitment before any quotes are sent.
Easily Confused
the naturally aspirated 4.4L V8
the robust V8 the 508PN replaced, which offered similar refinement but with less power and an older engine management architecture.
Alternative / Next-Gen Code
Land Rover 508PS
- the supercharged 5.0L V8 that took over the flagship performance role in later models, sharing the same block but adding a Roots-type supercharger and upgraded cooling components.
Related JLR Variants
Land Rover AJ133
- the 5.0L supercharged V8 variant often found in the same chassis, sharing the exact same foundational architecture but requiring different ECU mapping, fuel systems, and engine mounts.
Confirm the exact 508PN fitment
Not sure which revision you have- Enter your registration above - we'll confirm your exact 508PN fitment before any quotes are sent.
Buying Guide
Buying a Replacement 508PN - What to Choose
Choosing the right replacement route depends on your budget, risk tolerance, and ownership goals. Here's a breakdown of your options.
Used:
A used 508PN is only advisable for lower-value hosts or project builds, and must come with verifiable proof that the timing chain tensioners have been upgraded to the post-2013 specification and the coolant crossover pipes replaced. Without this documented history, the risk of inheriting a stretched chain or a cracked plastic coolant pipe is unacceptably high. Explore our vetted used 508PN engines
Reconditioned:
A proper reconditioned 508PN directly addresses the core weaknesses of this generation. It will include upgraded mechanical timing chain tensioners, machined aluminium coolant crossover pipes, and a refreshed water pump and thermostat housing. This is the most sensible, cost-effective route for preserving a Range Rover or Range Rover Sport without the unpredictability of a used unit. Compare reconditioned 508PN options
Rebuilt:
A full rebuild is justified for high-mileage examples showing signs of bore wear, or if the engine has already suffered overheating damage from a failed crossover pipe. A quality rebuild should include line-boring, new pistons and rings, and a complete overhaul of the valvetrain and cooling system to exceed factory specifications. Discuss a custom 508PN rebuild
Supply & Fit Line:
Our network of vetted UK Land Rover specialists can supply the unit and handle the complex installation, backing the work with a nationwide warranty so you have a single point of contact for the entire job. View supply and fit options
Vehicle Value Note:
For typical host vehicles like the 2010-2022 Range Rover (L322/L405) and Range Rover Sport (L320/L494), current market values often sit between £8,000 and £35,000 . With reconditioned replacement costs starting around £5,500, the replacement is generally financially viable ( Safe). The premium nature of these host vehicles easily absorbs the cost of a quality V8 replacement, provided the underlying chassis and electronics remain in good condition.
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Related Engines
Engines Related to the Land Rover 508PN
Explore engines that are closely related to the Land Rover 508PN, including its predecessor, successor, and key family variants.
Predecessor
the naturally aspirated 4.4L V8
the robust V8 the 508PN replaced, which offered similar refinement but with less power and an older engine management architecture.
Successor
Land Rover 508PS
- the supercharged 5.0L V8 that took over the flagship performance role in later models, sharing the same block but adding a Roots-type supercharger and upgraded cooling components.
Sibling
Land Rover AJ133
- the 5.0L supercharged V8 variant often found in the same chassis, sharing the exact same foundational architecture but requiring different ECU mapping, fuel systems, and engine mounts.
FAQ
Land Rover 508PNFrequently Asked Questions
Question 1How much does a Land Rover 508PN engine replacement cost-
A reconditioned Land Rover 508PN engine typically starts from £5,500 for supply-only, with fitted costs reflecting the complex V8 installation. Supply-only reconditioned units generally range from £5,500 to £9,000. Independent fitting labour typically adds 14-18 hours at approximately £65/hr. Quotes sourced through our network include a minimum 12-month warranty.
- Supply-only reconditioned units generally range from £5,500 to £9,000 .
- Independent fitting labour typically adds 14-18 hours at approximately £65/hr.
- Quotes sourced through our network include a minimum 12-month warranty.
Question 2What is the most common failure on the 508PN-
The dominant failure patterns on the 508PN are timing chain tensioner wear on pre-2013 models and coolant crossover pipe degradation. Early hydraulic tensioners can lose pressure, causing chain stretch and a distinct cold-start rattle that can lead to catastrophic valve damage. Plastic coolant crossover pipes in the V8 valley become brittle with age, causing rapid coolant loss and severe overheating. Post-2013 revisions feature significantly more durable timing components and improved cooling routing.
- Early hydraulic tensioners can lose pressure, causing chain stretch and a distinct cold-start rattle that can lead to catastrophic valve damage.
- Plastic coolant crossover pipes in the V8 valley become brittle with age, causing rapid coolant loss and severe overheating.
- Post-2013 revisions feature significantly more durable timing components and improved cooling routing.
Question 3Which Land Rover models use the 508PN engine-
The 5.0L naturally aspirated 508PN V8 was fitted to the Range Rover (L322 and L405) and Range Rover Sport (L320 and L494) between 2009 and 2022. It served as the premium petrol baseline, delivering smooth, linear power and refined cruising capabilities. It is mechanically distinct from the supercharged 5.0L variants found in SVR or high-spec models. Always verify your specific chassis code before ordering a replacement unit.
- It served as the premium petrol baseline, delivering smooth, linear power and refined cruising capabilities.
- It is mechanically distinct from the supercharged 5.0L variants found in SVR or high-spec models.
- Always verify your specific chassis code before ordering a replacement unit.
Question 4Should I buy a used or reconditioned 508PN engine-
A reconditioned 508PN is strongly recommended over a used unit to proactively address the known cooling system and timing chain weaknesses. Used units carry a high risk of inheriting degraded plastic coolant pipes or early-style hydraulic tensioners. Proper reconditioning upgrades these specific weak points with machined aluminium crossover pipes and revised mechanical tensioners. Reconditioned units come with a 12 to 24-month warranty, unlike the 3-6 months typical for used engines.
- Used units carry a high risk of inheriting degraded plastic coolant pipes or early-style hydraulic tensioners.
- Proper reconditioning upgrades these specific weak points with machined aluminium crossover pipes and revised mechanical tensioners.
- Reconditioned units come with a 12 to 24-month warranty, unlike the 3-6 months typical for used engines.
Question 5How do I know if my car has the 508PN and not the supercharged 508PS or AJ133-
You can confirm your engine code by checking the VIN plate under the bonnet or the stamped code on the engine block near the engine mount. The 508PN is visually identifiable by its naturally aspirated intake manifold, lacking the large Roots-type supercharger sitting in the V8 valley. It is commonly confused with the 508PS or AJ133, which share the same block but have entirely different forced-induction plumbing and ECU mapping. Fitting the wrong revision will cause severe compatibility and mapping issues.
- The 508PN is visually identifiable by its naturally aspirated intake manifold, lacking the large Roots-type supercharger sitting in the V8 valley.
- It is commonly confused with the 508PS or AJ133, which share the same block but have entirely different forced-induction plumbing and ECU mapping.
- Fitting the wrong revision will cause severe compatibility and mapping issues.
Compare Land Rover 508PN Engine Prices Today
Get a free, no-obligation price comparison tailored to your exact vehicle. Our registration lookup confirms your 508PN fitment before any quotes are sent, ensuring you receive accurate pricing for your specific Range Rover or Range Rover Sport chassis. With reconditioned 508PN units starting from £5,500, comparing takes two minutes and could save you four figures on your replacement.
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Minimum 12-Month Warranty
Minimum 12-month warranty on reconditioned and rebuilt options
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