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Mitsubishi 4G63
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Mitsubishi 4G63
Verdict
RISKY · 48/100
Est. cost /3yr
€6,000-14,000 over 3 years depending on modification level and use, with tracked or heavily tuned examples running toward the higher end due to consumables and potential rebuild costs
Oil interval
5,000 km
Recalls
0
Worst issue
Rod Bearing Failure from High-Boost / Tuned Use
CRITICAL
Mitsubishi 4G63
CT9A · Evo VII-IX
Rod Bearing Failure from High-Boost / Tuned Use
€2,000-6,000
CRITICAL
Cylinder Wall Scoring / Bore Damage from Tuning
€3,000-8,000
CRITICAL
Overheating and Coolant System Stress Under Boost
€400-1,200
HIGH
Fuel System Degradation on Modified Examples
€300-1,000
HIGH
Turbocharger Wear and Oil Feed Issues
€600-2,000
MODERATE
Valve Train Noise and Timing Belt Condition
€400-900
MODERATE
Mitsubishi 4G63
CT9A · Evo VII-IX
•Perform a full compression and leak-down test on all four cylinders, any cylinder below 10% of others is a red flag
•Pull the oil cap and inspect for sludge; request a fresh oil sample for analysis to check for metal particles
•Confirm timing belt, tensioner, and water pump replacement history, treat unknown history as overdue
•Check for injector size and verify it matches the ECU tune; ask for a dyno sheet or tune file if modified
•Inspect intercooler piping and charge pipes for oil residue indicating turbo seal failure
•Review the full modification history, any engine that has been boosted above stock or track-driven requires a pre-purchase inspection by a 4G63 specialist mechanic
Mitsubishi 4G63
CT9A · Evo VII-IX
Timing Belt, Tensioner & Idler Pulleys
Replace as a complete kit immediately if history unknown
60,000 km or every 5 years
Rod Bearings
Inspect or replace preventively on any modified or hard-driven example
At purchase or 80,000 km
Turbocharger Oil Feed Line
Inspect for restriction or cracking; replace if stiff or degraded
At purchase
Water Pump
Replace at timing belt service, often fails without warning
60,000 km
Fuel Injectors
Verify injector spec matches ECU tune; replace or rebalance if mismatched
At purchase on modified examples
Mitsubishi 4G63
CT9A · Evo VII-IX
No recalls on record
Mitsubishi 4G63
CT9A · Evo VII-IX
✓Iron block construction tolerates high boost without sleeving up to roughly 550 hp
✓Massive aftermarket and parts availability globally (dsmtuners, evolutionm communities)
✓Stock internals rated by community for reliable 400 hp with proper supporting mods
✓Well-documented engine with decades of tuning knowledge available
✓Strong low-end torque and proven rally pedigree
Mitsubishi 4G63
CT9A · Evo VII-IX
Real consumption
13.2 L/100km
Official consumption
Not available
Oil interval
5,000 km
Oil spec
5W-40 full synthetic, API SN or better. Community strongly recommends 5,000 km intervals on all turbo variants, shorter on tuned builds
Est. cost /3yr
€6,000-14,000 over 3 years depending on modification level and use, with tracked or heavily tuned examples running toward the higher end due to consumables and potential rebuild costs
Mitsubishi 4G63
CT9A · Evo VII-IX
276 hp · 407 Nm
2001-2003
276 hp · 407 Nm
2003-2005
291 hp · 407 Nm
2005-2006
Do not pick between these on power figures alone, the underlying bottom end (block, crank, rod bearings) is essentially the same across Evo VII, VIII and IX. The IX's MIVEC head gives better midrange torque and adds one extra maintenance item (the oil control solenoid) but is not inherently more or less durable than the earlier VII/VIII heads. Condition, modification history, and documented oil discipline matter far more than which generation or hp figure is on the title.