MG MGC C-Series Engines
from £5,000 to £15,000
Rebuilt units from £5,000 · Common codes: 29G, 29H, C-Series
MG ENGINE MARKETPLACE
MG MGC Engine Replacement - Rebuilt & Performance Options Available
Get quotes from trusted UK MG MGC engine specialists. Compare rebuilt and performance reconditioned prices for 29G and C-Series - 3.0L straight-6 covered. Find UK performance engine specialists.
Supply & Fit Available
12-Month Warranty
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MG MGC 29G High Compression
from £7,500 to £15,000
Rebuilt units from £7,500 · Common codes: 29G, 29G-HC, C-Series-29G
MG MGC 29H Low Compression
from £5,000 to £12,000
Rebuilt units from £5,000 · Common codes: 29H, 29H-LC, C-Series-29H
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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 MG C Replacement Engineto Finding the Best MG C 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 MG C Owners Across the UK
Rated 4.8 out of 5 by 1,081 verified customers who sourced reconditioned and used MG C engines through EngineMarket.
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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
MG MGC Engine ReplacementAll Variants Covered
MG MGC GT
29G/C-Series 2.9L Petrol
Rebuilt Engines: £7,500-£15,000
MG MGC Roadster
29G/C-Series 2.9L Petrol
Rebuilt Engines: £7,500-£15,000
MG MGC GT 1967
29G 2.9L Petrol
Rebuilt Engines: £7,500-£15,000
MG MGC Roadster 1968
29G 2.9L Petrol
Rebuilt Engines: £7,500-£15,000
MG MGC 29G
29G 2.9L High
Rebuilt Engines: £7,500-£15,000
MG MGC 29H
29H 2.9L Low
Rebuilt Engines: £5,000-£12,000
MG MGC C-Series
C-Series 2.9L Petrol
Rebuilt Engines: £5,000-£15,000
MG MGC GT 1969
29G 2.9L Petrol
Rebuilt Engines: £7,500-£15,000
MG MGC Left Hand Drive
29H/C-Series 2.9L Petrol
Rebuilt Engines: £5,000-£15,000
MG MGC Right Hand Drive
29G/C-Series 2.9L Petrol
Rebuilt Engines: £7,500-£15,000
MG MGC Manual
29G/C-Series 2.9L Petrol
Rebuilt Engines: £7,500-£15,000
MG MGC Numbers Matching
29G/C-Series 2.9L Petrol
Rebuilt Engines: £7,500-£15,000
Not sure which variant your MG MGC is- Enter your registration number above - we'll identify the exact sub-model, engine code and compatible replacement options instantly.
C
Engine Codes
MG MGC Engine CodesFull Technical Specifications & Replacement Guide
Every engine code fitted to the MG MGC 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 MG C variants.
29G - 2.9L Petrol
Main replacement demand comes from timing-chain, cooling-system and performance thermal-management faults.
Compatible variants
MGC GTMGC GT 1967MGC GT 1968MGC GT 1969MGC RoadsterMGC Roadster 1967
Avg. rebuilt price
£7,500 - £15,000
Supply only
Technical specifications
- Fuel type
- Petrol
- Engine size
- 2.9L (2912cc)
- Power output
- 145 hp
- Years fitted
- 1967-1969
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 MG MGC engine specialists. Every rebuilt engine comes with a minimum 12-month unlimited mileage warranty.
C
Common Problems
MG MGC Engine Problems - What It Costs to Fix & When Replacement Makes Sense
The MG MGC's C-series straight-6 is robust but has well-documented weak points. Timing chain tensioner failure and crankshaft vibration dominate replacement enquiries for both 29G and 29H engines. Every rebuilt engine supplied through EngineMarket includes upgraded internal components designed to address the original failure point - plus a minimum 12-month...
MG MGC Timing Chain Tensioner Failure - Why C-Series Engines Fail Catastrophically
MG MGC Timing Chain Tensioner Failure
Most affected vehicles
MG MGC GTMG MGC Roadster (1967-1969
MG MGC GT, MG MGC Roadster (1967-1969, 29G & 29H C-Series)
Failure mileage range
40,000-80,000 miles from new or last rebuild
Typical failure window
Root cause
Original hydraulic tensioner design prone to collapse without warning, allowing chain slap that damages guides, sprockets and can jump timing.
Repair options & estimated costs (UK ranges)
| Repair tier | Dealer price | Specialist price | What it involves | Longevity / suitability |
|---|---|---|---|---|
| Minor - Preventative Tensioner Upgrade | £800 - £1,500 | £500 - £900 | Replace original tensioner with upgraded mechanical or improved hydraulic unit, inspect chain/guides | Viable only if caught before chain damage; prevents catastrophic failure |
| Intermediate - Chain & Tensioner Replacement | £2,500 - £4,500 | £1,500 - £2,800 | Remove cylinder head, replace timing chain, tensioner, guides and sprockets; full re-timing | Suitable if block/crank undamaged; requires specialist C-series knowledge |
| Full Replacement - Rebuilt / Reconditioned Engine | £12,000 - £18,000 | £7,500 - £15,000 | Supply & fit of professionally rebuilt C-series engine with upgraded tensioner, balanced crank, lead-free conversion | Best value if original engine damaged; includes warranty and upgraded components |
Our recommendation
If you hear chain rattle or have lost oil pressure, stop driving immediately. On an MGC valued at £15,000-£35,000, preventative tensioner upgrade is far cheaper than a full rebuild after failure. If damage has occurred, a professionally rebuilt unit with upgraded internals offers better long-term value than patching a compromised block.
Compare rebuilt C-Series engine prices for your MG MGCReplacement Engine Options
MG MGC Engine TypesOptions, Costs & What to Expect
Every MG MGC engine type is available through our UK network with typical price ranges based on variant, engine code and budget.
MG MGC Reconditioned Engines (Recon)£5,000 - £12,000((supply only))
MG MGC Rebuilt Engines£7,500 - £15,000((supply only))
MG MGC Used Engines£2,500 - £6,000((supply only))
MG MGC Remanufactured Engines£8,000 - £15,000((supply only))
MG MGC Refurbished Engines£4,000 - £9,000((supply only))
Compare MG C 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 MG MGC within hours.
Engine Sizes
MG MGC Engines by SizeFind the Right Displacement for Your Variant
Every displacement fitted to the MG MGC is listed below, with compatible engine codes, production years and common failure notes to help you identify the correct replacement.
The 2.9-litre C-series straight-6 was the sole engine offered in the MG MGC across its 1967-1969 production run. This robust overhead-valve unit powered both GT and Roadster variants, with high-compression 29G and low-compression 29H codes determining performance and market destination.
⚙
Engine Code(s)
29G, 29H, C-Series
▣
Compatible Models (UK)
MG MGC GT (1967-1969), MG MGC Roadster (1967-1969), Export LHD variants
ϟ
Power output
Verified by registration
△
Common Failure Points
Timing chain tensioner collapse, three-bearing crankshaft vibration, oil pump wear on high-mileage units
Production Years: Check by registration
Compare MG MGC 2.9L petrol engine pricesFuel Type
MG MGC Engines by Fuel Type
Choose your MG MGC engine by fuel type to compare realistic replacement prices, known issues, and compatible UK supply options - from the high-compression 29G to the export-spec 29H.
MG MGC Petrol Engines
PetrolThe MG MGC was exclusively petrol-powered, using the BMC C-series 2.9-litre straight-6 across all UK and export variants from 1967-1969.
Common MG MGC Petrol Engine Families
- •29G - High-compression UK-spec engine (145hp), most sought-after for performance and authenticity
- •29H - Low-compression export engine (140hp), common in North American imports and direct replacement option
- •C-Series (Generic) - Umbrella code used when specific compression variant is unknown or interchangeable
Found In
- •MG MGC GT (1967-1969) - 29G (UK), 29H (Export)
- •MG MGC Roadster (1967-1969) - 29G (UK), 29H (Export)
Known For
- •Notorious timing chain tensioner failure requiring urgent specialist attention
- •Three-bearing crankshaft design limits high-speed cruising due to vibration
- •Strong low-end torque and classic SU carburettor character when well maintained
Typical Petrol Models
- •MG MGC GT
- •MG MGC Roadster
- •MG MGC GT Left Hand Drive
MG MGC Petrol Engines
PetrolThe MG MGC was exclusively petrol-powered, using the BMC C-series 2.9-litre straight-6 across all UK and export variants from 1967-1969.
Common MG MGC Petrol Engine Families
- •29G - High-compression UK-spec engine (145hp), most sought-after for performance and authenticity
- •29H - Low-compression export engine (140hp), common in North American imports and direct replacement option
- •C-Series (Generic) - Umbrella code used when specific compression variant is unknown or interchangeable
Found In
- •MG MGC GT (1967-1969) - 29G (UK), 29H (Export)
- •MG MGC Roadster (1967-1969) - 29G (UK), 29H (Export)
Known For
- •Notorious timing chain tensioner failure requiring urgent specialist attention
- •Three-bearing crankshaft design limits high-speed cruising due to vibration
- •Strong low-end torque and classic SU carburettor character when well maintained
Typical Petrol Models
- •MG MGC GT
- •MG MGC Roadster
- •MG MGC GT Left Hand Drive
Not sure which fuel type your MG MGC 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 MG MGC specialists.
Engine Years →
MG MGC Engines by YearWhat Was Fitted & WhenMG MGC Engines by Year - What Was Fitted & When
This section covers all major engine changes across the MG MGC's 1967-1969 production timeline, organised so owners can quickly identify their C-series engine and compare rebuilt prices from UK specialists.
⚙Key Changes
- ✓1967: Launch of MG MGC GT and Roadster with C-series 29G high-compression engine for UK market
▣Main Engines
▰Popular Models
🔧Known For
Engine Codes Covered:
Not sure which year your MG MGC 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 MG MGC specialists.
FAQ