Mercedes-Benz AMG GT 63 Engine Replacement Compare Prices & Get Quotes

A replacement M177 LS2 engine for a GT 63 typically costs between £5,500 and £18,000 depending on condition. Used units start from £5,500-£9,000, reconditioned from £11,000-£15,000, and fully rebuilt from £11,000-£18,000. Labour for supply & fit adds £800-£1,500 for AMG-specialist work. A typical GT 63 is worth £100,000-£160,000, making engine replacement a viable investment for well-maintained cars.

• Used M177 LS2: £5,500-£9,000
• Reconditioned M177 LS2: £11,000-£15,000
• Rebuilt M177 LS2: £11,000-£18,000

The GT 63 uses the M177 LS2 engine, which has a timing chain, not a belt. However, the M177 is known for timing chain tensioner wear - a rattling noise on cold start is the classic warning sign. A specialised M177 timing tool kit is required for accurate camshaft and crankshaft alignment during any timing work.

• M177 LS2: timing chain - tensioner wear is a known issue
• Rattling on cold start is the warning sign
• Regular oil changes are critical for chain longevity

Common signs of engine problems in the GT 63 include: oil spots under the car (oil leaks from gaskets, seals or turbo feed lines), a rattling noise on cold start (timing chain tensioner wear), excessive oil consumption or blue smoke from the exhaust (bore scoring or piston ring wear), and misfires or rough running (ECU issues or ignition problems). Camshaft adjuster magnet failure can also occur, pushing oil into the wiring harness and potentially destroying the ECU.

• Oil leaks - gaskets, seals, turbo feed lines
• Rattling on cold start - timing chain tensioner
• Oil consumption - bore scoring or piston rings

It depends on the car's condition and mileage. A GT 63 is typically worth £100,000-£160,000 - a rebuilt M177 LS2 engine (£11,000-£18,000) is usually well within the car's value and can be a worthwhile investment if the car is in good condition. For lower-value examples or those with multiple issues, a specialist repair (gaskets, timing chain, oil consumption) may be more economical than a full replacement.

• Vehicle worth £100,000-£120,000: rebuilt engine viable for good condition cars
• Vehicle worth £120,000+: rebuilt engine usually justifies cost
• Preventative repairs: often more economical than full replacement

The M177 in the GT 63 is a wet-sump engine, while the M178 in the C190 AMG GT was dry-sump. The M177 shares its architecture with the broader AMG V8 range, including the E63 and G63. Both are 4.0-litre V8 biturbos with hot-vee layout, but the M177's wet-sump design is simpler and more cost-effective to maintain, though some enthusiasts prefer the dry-sump M178 for track-focused applications. The GT 63's M177 LS2 produces 577 hp in standard form, rising to 639 hp in the GT 63 S.

• M177 (GT 63): wet-sump, 577-639 hp
• M178 (C190): dry-sump, 462-585 hp
• Same 4.0L V8 architecture, different oiling system

Power loss in the GT 63 is most commonly caused by oil leaks from the turbocharger feed lines, which can starve the turbos of oil. Other causes include camshaft adjuster magnet failure affecting valve timing, timing chain tensioner wear causing timing drift, and ECU programming issues. A diagnostic check with Mercedes STAR/XENTRY or compatible equipment is essential to identify the exact cause.

• Turbo oil feed line leaks - oil starvation
• Camshaft adjuster magnet failure - timing issues
• ECU programming - misfire and power loss