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Mitsubishi 4G63T
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Mitsubishi 4G63T
Verdict
RISKY · 47/100
Est. cost /3yr
€4,500-12,000 over 3 years depending on condition, modification level, and whether major deferred maintenance (timing belt, head gasket, recall work) needs addressing at purchase
Oil interval
5,000 km
Recalls
3
Worst issue
Head Gasket Failure
CRITICALMitsubishi 4G63T
2G · 2G DSM
Head Gasket Failure
€600-1,800
Fuel Tank Gasket Fuel Leak
€150-500
Piston Ring Wear and Blowby
€1,200-3,500
Front Suspension Lower Ball Joint Failure
€200-600
ABS Hydraulic Unit Mounting Fatigue Crack
€300-900
Distributor and Ignition System Reliability
€150-450
Cooling System Failures
€200-800
Mitsubishi 4G63T
2G · 2G DSM
•Run the VIN through NHTSA to confirm the three recalls relevant to FWD GST models (ball joints, ABS mount, fuel tank gaskets) have been completed. Note the separate transfer case recall applies only to AWD GSX/Talon AWD variants, not this FWD GST
•Perform a wet and dry compression test on all four cylinders, any cylinder below 150 psi or more than 10% variation signals ring or gasket wear
•Check coolant for brown discolouration or oily residue and oil cap for white milky deposits, both indicate head gasket compromise
•Verify timing belt replacement history, if unknown or overdue, budget €300-600 immediately as this is an interference engine with catastrophic failure risk
•Smell around the fuel tank and fuel pump area for any petrol odour, and inspect for fuel staining indicating gasket deterioration or incomplete recall work
•Listen for distributor-related misfires or rough idle on a cold start, and check the distributor cap and rotor for carbon tracking
Mitsubishi 4G63T
2G · 2G DSM
Head Gasket (7-bolt)
Inspect for leaks and compression integrity; replace proactively if car has unknown history or over 150,000 km
150,000 km
Timing Belt and Tensioner
Replace with full kit (belt, tensioner, idler, water pump), interference engine, failure is catastrophic
90,000 km or every 4 years
Fuel Tank Gaskets
Inspect for fuel smell and seepage; replace gaskets if recall not completed or signs of deterioration present
Any km, inspect immediately on purchase
Coolant System (Radiator, Thermostat, Hoses)
Pressure test and replace all rubber hoses, thermostat, and radiator cap on any high-mileage example
120,000 km
Piston Rings
Leakdown test before purchase; budget for rebuild if blowby is detected on high-mileage engines
160,000 km
Mitsubishi 4G63T
2G · 2G DSM
Front Suspension Lower Ball Joints
Damaged rubber boots on lower lateral arm ball joints allow contamination leading to ball joint failure and potential loss of steering control
ABS Hydraulic Unit Mounting (Service Brakes, Hydraulic)
Headlamp support panel fatigue crack allows ABS hydraulic unit to detach or move, compromising brake system integrity
Fuel System Gasoline - Fuel Tank Gaskets
Incorrectly installed fuel pump and/or gauge unit gaskets allow fuel or fumes to escape, creating fire risk
Mitsubishi 4G63T
2G · 2G DSM
✓Legendary aftermarket support, one of the most tuned 4-cylinder engines in history
✓Extremely strong stock block capable of handling well over 400 hp with supporting mods
✓Large, well-documented enthusiast community with decades of DIY knowledge
✓Parts availability remains good through aftermarket and DSM specialist suppliers
✓Proven design with long production history giving excellent community knowledge base
✓Responds exceptionally well to bolt-on modifications even in stock form
Mitsubishi 4G63T
2G · 2G DSM
Real consumption
11.3 L/100km
Official consumption
Not available
Oil interval
5,000 km
Oil spec
5W-30 or 10W-30 full synthetic; DSM community strongly recommends 5,000 km intervals maximum due to turbo heat cycling and age of engine seals
Est. cost /3yr
€4,500-12,000 over 3 years depending on condition, modification level, and whether major deferred maintenance (timing belt, head gasket, recall work) needs addressing at purchase