Rebuilt MG MGC Engine for Sale - Save Up to 60% UK Wide
Compare Prices & Save on MGC engines. Rebuilt C-Series I6 units for MGC chassis (1967–1969) with 12m Unlimited Mileage Warranty.
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MG MGC Specialists
Expert Solutions for Every MGC – 3.0L Inline-6 to GT V8
Need a reliable replacement engine for your MG MGC?
Engine Finders specializes in MGC engines with comprehensive solutions addressing common issues
across all variants, from classic 3.0L inline-6 models to high-performance GT V8s.
- ✔ Full MGC Engine Range – Inline-6 & V8 engines across all generations
- ✔ Series-Wide Calibration – Correct tuning and ECU mapping for every MGC chassis
- ✔ MGC Pricing Advantage – Save significantly vs dealer on rebuilds and replacements
MG MGC Replacement Engines Options - Verified Units (UK Supply)
All engines bench-tested, VAT-inclusive, with 12-month warranty. MoT-compliant. Nationwide delivery. Direct OEM fitment for ADO52 (GCN1 / GCD1).
C-Series 2912cc straight-six rebuilt with upgraded lead-free valve seats and modern gaskets.
Machined to zero-mile tolerance, rectifying rare block cracking and cooling passage restrictions.
Fully inspected 29G units with seven-main-bearing crank polished and timing chains replaced.
Direct-fit replacement for GT and Roadster models with correct oil sump configurations.
Chemically cleaned castings and performance-tuned oil pumps for stable pressure at temperature.
Rare, verified-mileage 2.9L straight-six units with compression results and health reports.
MG MGC Compatible Engine Codes & Average Prices on Rebuilt Units
All engines professionally reconditioned, bench-tested, and supplied with 12-month warranty. Direct OEM fitment. VAT-inclusive. Nationwide UK delivery.
Why Choose Engine Finders for Your MG MGC Engine?
Engine Finders connects UK drivers with vetted specialists for reliable, reconditioned MG MGC replacement engines. Spanning all series from the 3.0L inline-six engines to later performance enhancements, we tackle recurring issues such as timing chain elongation, head gasket leaks, and carburettor misalignments. From oil pump wear to overheating vulnerabilities, our series-level expertise ensures every MGC variant receives comprehensive, long-lasting solutions.
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✔ MGC-Wide Timing Chain & Tensioner Service
Across all 3.0L MGC engines, timing chain elongation and tensioner wear (OEM 18G623) are common. Engine Finders provides series-level replacements to restore precise timing across every MGC variant.
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✔ Cylinder Head & Gasket Reconditioning
Head warping and gasket failures affect all MGC inline-six engines (OEM 18G614). Engine Finders delivers series-specific reconditioning to maintain compression integrity and prevent leaks across the full series.
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✔ Oil Pump & Lubrication System Upgrades
Oil pump wear is prevalent in all MGC engines (OEM 18G1341), risking reduced pressure and accelerated wear. Engine Finders provides complete lubrication system upgrades, ensuring reliable operation for every MGC variant.
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✔ Carburettor & Fuel System Precision Rebuilds
All MGC engines employ SU carburettors that suffer wear and tuning inconsistencies (OEM 18G296). Engine Finders performs series-focused rebuilds to restore smooth fuel delivery and optimal throttle response.
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✔ Cooling System & Water Pump Maintenance
Water pump and thermostat failures affect all MGC variants (OEM 18G1243), causing overheating. Engine Finders provides series-approved cooling system maintenance to ensure consistent engine temperature control.
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✔ Ignition & Electrical System Overhaul
Distributor and ignition components (OEM 18G2090) in all MGC engines experience similar wear. Engine Finders performs series-level electrical and ignition system overhauls for consistent starting and running performance.
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✔ Exhaust & Emissions Component Servicing
Exhaust manifolds and emissions components (OEM 18G721) degrade across all MGC variants. Engine Finders conducts series-focused repairs to maintain compliance, efficiency, and long-term engine health.
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✔ Series-Level Diagnostics & Sensor Calibration
All MGC engines benefit from precise sensor calibration (OEM 18G722). Engine Finders provides series-wide diagnostics to ensure accurate readings, smooth performance, and reliable operation across the full MGC range.
Rated 4.7 out of 5 by 732 satisfied customers who chose reconditioned and used MG engines through Engine Finders.
Based on real post-sale feedback from buyers matched with verified UK suppliers.
MG MGC Engines for Sale | Engine Finders
Engine Finders connects UK drivers with specialists for reliable, reconditioned MG MGC replacement engines. Whether battling oil pressure drops in the heavy-duty C-Series straight-six or addressing head gasket vulnerabilities in North American spec variants, we provide direct OEM-spec solutions for the entire MGC series.
MG MGC Replacement Engines
The MG MGC (1967–1969) represented a significant technical departure from the MGB, housing the 2912cc C-Series engine originally derived from the Austin-Healey 3000. Throughout the series production, technical bulletins addressed the specific cooling requirements of this dense straight-six within the MGC engine bay. A cross-generation failure pattern involves the 7-main-bearing crankshaft, which, while robust, suffers from significant oiling priorities at the rear journals if the internal galleries are not perfectly clear. Shared issues across Roadster and GT variants include localized overheating near cylinder six and premature wear of the oil pump drive gear. Furthermore, North American export versions faced additional thermal stress due to early emissions equipment. Our reconditioning process corrects these series-wide deficiencies, utilizing modern high-flow oil pumps and reinforced head gaskets to ensure these classic grand tourers remain reliable on modern roads.
MG MGC Models & Engines Codes
The MGC series utilized a specific family of the BMC C-Series engine designed for high-torque performance:
- 29GA C-Series: 3.0L Straight-six (7-bearing) – Shared oiling restrictions in the rear gallery affecting all early production units.
- 29GB/29GC: 3.0L Straight-six (7-bearing) – Revised breathing for North American and late-series variants; shared carburettor heat-soak issues.
- C-Series 2.9L (7-Main): Shared thrust washer wear (Part 12G2111) leading to crankshaft end-float across both Roadster and GT chassis.
All engines in the MGC series require precision balancing of the heavy crankshaft to mitigate the harmonic vibrations that frequently damage shared engine mounts and transmission bellhousings.
Buy Used and Second-Hand MG MGC Engines
For MGC owners, used engines carry high risk due to the rare nature of 7-bearing C-Series blocks and shared sludge build-up in cooling jackets. We recommend reconditioned units for several reasons:
- Gallery Cleansing: Reconditioned C-Series units undergo ultrasonic cleaning to clear rear-journal oiling paths essential for the 2.9L family.
- Thermal Protection: Remanufactured engines for the MGC include updated water pump impellers to prevent the series-wide cylinder six hot-spots.
- Unleaded Conversions: All heads are fitted with hardened valve seats, a mandatory upgrade for the entire series to survive modern UK fuels.
Every replacement unit ensures that shared 29GA/GB/GC engineering flaws, such as fragile rocker shaft brackets, have been replaced with reinforced components.
MG MGC Engines in Stock
Our reconditioned MG MGC engines are built to rigorous standards to handle the weight and heat of the 3.0L iron block:
- Bottom-End Strength: Crankshafts are crack-tested and balanced to tighter-than-factory tolerances for all Roadster and GT units.
- Valvetrain Refinement: New camshafts and followers are fitted to every C-Series rebuild to correct the lobe wear typical of the series.
- Sealing Technology: Modern viton rear main seals are used to address the chronic oil leaks found in second-hand SJ-era engines.
All stock undergoes 4-hour dyno tests simulating grand touring loads across the 145–150bhp range, with compression checks meeting original BMC factory standards for the entire MGC series.
Warranty for Replacement MG MGC Engines
We provide a 12-month warranty on all rebuilt MGC engines. This coverage spans all 2.9L C-Series engine families within the Roadster and GT series.
- Component Coverage: Includes the 7-bearing crankshaft, camshaft, pistons, and all internal lubricated valvetrain parts.
- Series-Wide Support: Coverage applies to both automatic and manual variants, ensuring the drive-gear remains protected.
- Specialist Vetting: Technical claims are handled by UK-based specialists with specific expertise in heavy-block C-Series engineering.
Engine Finders is a price comparison website - warranty terms are set by our vetted UK suppliers. Final coverage varies by engine family and core condition.
Expert Tips for Choosing the Right Engine for Your MG MGC
♻️ MG MGC Engine Types Explained
- Fully Reconditioned C-Series: Essential for the 2912cc inline-six, addressing crankshaft harmonics.
- Original Low-Mileage: Extremely rare; only consider from a known, verified restoration.
- Balanced & Blueprinted: Recommended to mitigate the engine's inherent vibration issues.
- Replacement often involves using the more common Austin-Healey 3000 engine block as a base.
£ MG MGC Replacement Engine Cost in the UK
- Rebuilt C-Series using an AH 3000 core: £4,500 - £7,000.
- Balanced & blueprinted performance rebuild: £8,000 - £12,000.
- Used, running engine (if found): £2,500+ due to extreme rarity.
- Cost is significantly higher than an MGB engine due to specialist work required.
🔍 Finding the Right MG MGC Engine
- Engine number prefix should begin with '29GC' or '29GD' for the MGC application.
- The block is an Austin-Healey 3000 type (29D) but with unique MGC sump and mounts.
- Must have the correct 7-bearing crankshaft, not the earlier 6-bearing type.
- Verify the presence of the unique front engine plate and oil filter housing.
⛽ MG MGC Petrol vs Diesel Engines
- The MGC was only ever produced with the 3.0L C-Series petrol inline-six.
- As a pre-1973 vehicle, it is ULEZ exempt and has no catalytic converter.
- Fuel efficiency is poor (~18 MPG) due to the heavy engine and carburettors.
- No factory or common diesel conversions exist due to the car's rarity and value.
🔒 Quality Assurance & Warranty
- Verify the crankshaft has been dynamically balanced, not just the clutch assembly.
- Ensure the block has been line-bored to correct any distortion from the heavy crank.
- A warranty of 6-12 months is standard for a low-volume, specialist rebuild.
- Request documentation of the balancing process and cylinder head pressure test.
🛒 Compare & Save on MG MGC Engines
- Source a used Austin-Healey 3000 engine block as a rebuildable core.
- Use a reputable MG specialist (e.g., University Motors, Peter May) to ensure correctness.
- Avoid any rebuild that does not specifically address crankshaft balancing.
- We have contacts with specialist engineers who understand the C-Series' unique needs.
⚙️ MG MGC Engine Works: How Experts Rebuild Engines
When your engine fails, MG MGC engine works can restore performance at a fraction of the cost of a brand-new engine. From diagnostics to rebuild, here's how experts ensure optimal results.
1. Specialised C-Series Disassembly & Inspection
The engine is meticulously stripped. The 7-bearing crankshaft is checked for straightness and wear on the centre main journal, a known weak point. The block is examined for cracks, particularly around the main bearing webs, which suffer stress from crankshaft flex.
2. Critical Machining for Vibration Control
The block is align-bored to ensure perfect main bearing alignment. The crankshaft is sent for dynamic balancing, with the clutch and front pulley balanced as an assembly. Cylinder bores are honed. The cylinder head is refurbished with unleaded valve seats.
3. Precision Reassembly with Upgrades
The balanced crankshaft is fitted with new bearings, ensuring correct clearances. A high-capacity oil pump is installed. The camshaft is fitted, often a mild regrind to improve torque. The timing chain and gears are replaced. The engine is assembled using a torque plate during honing where possible.
4. Ancillary System & MGC-Specific Parts
The unique MGC front engine plate, sump, and oil filter housing are refurbished and fitted. Twin SU HIF6 carburettors are fully rebuilt and balanced. The distributor is recurved to suit the engine's characteristics. All gaskets are high-quality composite types.
5. Rigorous Running-In & Tuning
The engine is run on a dyno with break-in oil. Valve clearances are set. Carburettor balance and mixture are meticulously adjusted to achieve smooth running across the rev range, crucial for mitigating the perceived roughness. Oil pressure is verified (target 60+ psi hot).
6. Final Validation for a Classic GT
A comprehensive compression test is performed. The engine undergoes a heat cycle test to check for leaks. A final power run confirms output matches expectations for the historically underrated C-Series. Documentation, including balancing certificates, is supplied.