Mitsubishi Big 16G Turbo Rebuild Service

PT Turbo rebuilds and remanufactures Mitsubishi Big 16G turbochargers in-house at our San Bernardino, CA shop. Every unit goes through a full teardown, OEM-spec or better parts replacement, CIMAT VSR balancing, and final quality inspection before it ships back — backed by a 12-month unlimited mileage warranty and nationwide mail-in service. Commonly found on Mitsubishi Evo / DSM Performance Upgrade.

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Trouble Codes Often Seen on Mitsubishi Evo / DSM Performance Upgrade Equipped with the Mitsubishi Big 16G

These are generic diagnostic trouble codes commonly associated with turbo boost control issues on this application. They’re triggered by the vehicle’s ECU, not the turbo itself, so confirm with a scan tool before assuming the turbocharger is at fault.

• P0299 — Turbocharger/Supercharger Boost Pressure – Low (underboost)
• P0234 — Turbocharger/Supercharger Overboost Condition

Also Known As

The Big 16G goes by several names depending on which forum or builder you ask.

• Mitsubishi Big 16G turbo
• Big 16G Evo turbo
• DSM Big 16G upgrade turbo
• Mitsubishi TD05H 16G
• Big 16 Mitsubishi performance turbo
• 4G63 Big 16G turbo

Vehicles We Commonly See With the Mitsubishi Big 16G

The Big 16G is a popular bolt-on bump for 4G63 platforms looking for more flow without going full big-frame.

Mitsubishi Lancer Evolution

• Evo IV through VI (1996-2001)
• Evo VII and VIII (2001-2005)
• Evo IX (2005-2007) with MIVEC head builds

Eclipse / Talon / Laser DSM Builds

• 1G DSM Eclipse GSX and Talon TSi AWD (1990-1994)
• 2G DSM Eclipse GS-T and GSX (1995-1999)
• Plymouth Laser RS turbo applications

Galant VR-4 and Swapped Platforms

• Galant VR-4 (1991-1992) 4G63 turbo builds
• Custom 4G63 engine swaps using the Big 16G as a daily-driven upgrade

Common Mitsubishi Big 16G Failure Symptoms

• Excessive shaft play felt by rocking the compressor wheel front to back, a telltale sign of worn thrust bearing
• High-pitched whine or grinding at high RPM that gets worse under sustained boost
• Blue smoke on hard acceleration or after letting off boost, pointing to oil seal failure
• Boost falling off or refusing to hold target at the top of the rev range
• Visible contact marks or chipped blades on the compressor wheel from ingested debris
• Oil pooling in the intercooler piping or compressor housing
• Loss of throttle response and laggy spool compared to how the turbo behaved when fresh
• Audible flutter or surge that did not exist before, often after an aggressive tune change

Real Mitsubishi Big 16G Failures We See in Our Shop

The Big 16G is a strong unit, but the way Evo and DSM guys push them brings the same handful of failures across our bench again and again.

• On the Big 16G units we rebuild, over-speed damage is the number one killer. Aggressive standalone tunes pushing the compressor past its efficient flow range stretch the wheel and crack blade tips, and once the wheel is over-spun the bearing system follows fast.
• We frequently see thrust bearing wear on cars that live in high boost. The 16G’s thrust system does not love sustained load at high duty cycle, and we pull plenty of units where the thrust pads are flattened and the wheel is rubbing the housing.
• Foreign object damage to the compressor wheel is extremely common on DSM builds running questionable filters or no filter during testing. A single bolt, a piece of a torn filter, or silicone debris from a sloppy intake job shreds the blades instantly.
• Oil seal failures show up on units that were run hard then shut down hot. Coked oil behind the seals lets pressure push oil into the compressor side, and we see the classic blue smoke and oily piping that comes with it.
• We also catch shaft imbalance from prior cheap rebuilds where the rotating assembly was never properly balanced after a wheel swap, which sets up the next over-speed or bearing failure.

Preventing Future Mitsubishi Big 16G Failures

Most Big 16G failures we see are preventable with disciplined habits, especially on tuned cars.

• Change oil every 3,000 miles with a quality synthetic, since the 16G bearing system is sensitive to dirty or sheared oil
• Let the engine idle 30 to 60 seconds before shutdown after hard driving to protect the seals from heat soak and coking
• Warm the oil before hammering boost from a cold start, cold oil starves the thrust bearing right when it is loaded
• Keep your tune within the compressor’s realistic flow range and avoid chasing boost numbers the 16G cannot move efficiently
• Run a properly clamped, debris-free intake with a quality filter, no exposed inlet during dyno or testing
• Check all intercooler couplers and clamps for boost leaks that force the turbo to over-spool to hold target
• Verify oil feed and drain lines are clear and unrestricted, a restricted drain pushes oil past the seals

Common Mitsubishi Big 16G Upgrade Paths

When customers send in a Big 16G for rebuild, a lot of them ask about going beyond a straight restore. The most common requests are upgraded billet compressor wheels to gain flow and over-speed resistance, stronger 360-degree thrust bearings to survive sustained boost, and balanced rotating assemblies for higher RPM stability. Some builders also ask about turbine wheel changes to shift spool or top-end flow. These are factual options we discuss based on your power target and how the car is driven, since the right combination depends on whether you want street reliability or maximum output.

Frequently Asked Questions

How to Identify Your Mitsubishi Turbo

The identification tag is typically located on the compressor housing, bearing housing, or center section of the turbocharger. It usually lists the model number, assembly number, and serial number. If you’re not sure which Mitsubishi model you have, send PT Turbo a photo of the tag and we’ll help identify it before you ship anything.

PT Turbo Warranty

• 12-month, unlimited mileage warranty against defects in parts and workmanship
• Final quality inspection on every rebuild: leak test, visual inspection, actuator or wastegate function check
• In-house CIMAT VSR balancing with a balance report included
• Nationwide mail-in service — you don’t need to be local

What the Mitsubishi Big 16G Rebuild May Include

• Complete teardown of all major components
• Ultrasonic or parts cleaning to remove carbon, oil residue, and contamination
• Journal bearing, thrust bearing, and seal replacement
• O-rings and hardware replacement
• Shaft and wheel inspection, with compressor or turbine wheel replacement if needed
• Wastegate inspection and actuator linkage service, when equipped
• CIMAT VSR balancing
• Final inspection

Why Customers Choose PT Turbo

• Rebuilding turbochargers, including Mitsubishi, since 1978
• In-house CIMAT VSR balancing on every unit, not outsourced
• Full housing sandblasting and OEM-spec or better parts replacement
• Inspect first, quote before work begins — no surprise charges
• Nationwide mail-in service from our San Bernardino, CA shop

PT Turbo Inspection Process

Every turbocharger goes through the same evaluation before any work begins:

1. Initial evaluationcompressor wheel, turbine wheel, shaft, bearing housing, VGT assembly (if equipped), actuator, and seal surfaces are checked first.
2. Complete disassemblythe turbocharger is fully torn down and every major component is inspected individually.
3. Cleaningcomponents are cleaned to remove carbon, oil residue, rust, and contamination.
4. Measurementcritical tolerances are measured against OEM specification.
5. Reassemblyrebuilt using new wear components matched to your specific model.
6. CIMAT VSR balancingthe rotating assembly is balanced in-house, with a balance report included.
7. Final inspectionleak test, visual inspection, and actuator or wastegate function check before shipment.

No work begins without your approval. You receive a quote after inspection, not before.

Pricing

Most rebuilds require inspection before final pricing. Standard rebuild pricing depends on the turbo model, parts availability, wheel condition, shaft condition, housing damage, and whether upgrades are requested. PT Turbo inspects every turbo and sends a quote before any work begins — no surprise charges.

Related Mitsubishi Models

Turbo Models That Fit the Mitsubishi Big 16G

• Mitsubishi 16G Turbo Rebuild Service