Toyota 2JZ Rebuild, common faults & everything you need to know
The complete guide to Toyota's legendary inline-six. 2JZ-GE and 2JZ-GTE - from the Supra MK4 to the Aristo, with verified factory torque specs.
The 2JZ is the cast iron block that became a legend. Toyota's inline-six in 3.0L form with a square 86 × 86 mm bore, 7 main bearings and a design that handles more than double factory power. The 2JZ-GE is the NA version, the 2JZ-GTE is the twin-turbo version from the Supra MK4 and the Aristo. We have rebuilt 2JZ bottom ends for everything from daily driving to 1000+ hp drag builds. We carry out cylinder head reconditioning, complete engine reconditioning and performance builds with a 12-month warranty. Every torque spec on this page is verified against the Toyota Supra Repair Manual RM502U.
The 2JZ at a glance
Shared base data for the whole 2JZ family. Variant-specific differences are listed in the table below and under torque specs.
| Variant | Year | VVT-i | Power | Torque | Chassis |
|---|---|---|---|---|---|
| 2JZ-GE | 1991-1997 | No | 220 hk | 290 Nm | JZA80 Supra, JZS147 Aristo, JZZ31 Soarer |
| 2JZ-GE VVT-i | 1995-2007 | Intake | 225-230 hk | 298 Nm | JZS160/171, JZS110, JCE10 Altezza/IS300 |
| 2JZ-GTE Turbo | 1991-1997 | No | 280-330 hk | 431 Nm | JZA80 Supra Turbo, JZS147 Aristo 3.0V |
| 2JZ-GTE VVT-i Turbo | 1997-2002 | Intake | 280-330 hk | 451 Nm | JZS161 Aristo V300, late JDM JZA80 |
| 2JZ-FSE | 1999-2007 | Yes, D-4 | 217-220 hk | 294 Nm | JZS17x Crown, Brevis, Progrès |
Torque specs
Verified against the Toyota Supra Repair Manual RM502U (the 1997 USDM Supra FSM covering both the 2JZ-GE and 2JZ-GTE, pages SS-4 to SS-71). Values apply to oiled threads. TTY stretch bolts are replaced on disassembly.
Cylinder head
Engine block & bottom end
Timing belt & timing
Turbo (2JZ-GTE)
Intake, exhaust, cooling
NOTE - Head bolts: A 3-step TTY procedure (34 Nm + 90° + 90°). 14 x M10×1,25. Oil the threads AND under the head with engine oil. Use a 10 mm bi-hexagon socket. Paint-mark the front face before step 2 - it is easy to lose count mid-sequence. Total angle turn after the initial torque: 180°. Never reuse.
NOTE - Crank pulley 324 Nm: An extremely high single torque. The FSM requires oiled threads and a ring-gear stopper on the flywheel. Bad clamping = loose pulley = belt failure = valve contact on this interference engine. Think twice.
NOTE - GE vs GTE cooling systems differ: The water outlet on the cylinder head is 8,8 Nm on the 2JZ-GE but 21 Nm on the 2JZ-GTE. Water inlet × water pump has the same split (8,8 Nm GE / 21 Nm GTE). Easy to miss - check the variant before torquing.
NOTE - Oil squirters on the GTE: The 2JZ-GTE has 6 piston-cooling oil squirters in the block - each at 8,8 Nm. The 2JZ-GE has none. It is easy to overtorque and strip the M8 thread in the block. Remember this is a delicate 8,8 Nm torque, not a standard 20+ Nm.
NOTE - ARP values apply only to ARP bolts: ARP head studs PN 203-4205 for the 2JZ-GTE are specced to 80 ft-lbs with ARP Ultra-Torque or 110 ft-lbs with engine oil. That is ARP's spec. NEVER use ARP values on OEM bolts - OEM runs the 34 Nm + 90° + 90° TTY procedure.
Factory tolerances & wear limits
Original values from Toyota FSM RM502U SS-4 to SS-25. The GE and GTE share most values - variant-specific differences are marked.
Toyota does not sell any OEM oversize for the 2JZ. Aftermarket pistons (Wiseco, CP-Carrillo, Brian Crower, Manley) are required when overboring. The Toyota FSM documents warpage limits but no material-removal limit for resurfacing the cylinder head/block. Our practice: minimal material removal, always with a measurement record against the new head height.
Common Toyota 2JZ faults
The 2JZ bottom end is legendarily durable - most faults sit up top, around the seals, or on the GTE's sequential turbo system.
VVT-i actuator rattle (VVT-i variants)
Common • Medium- Symptoms
- A diesel-like rattle from the timing belt side on cold start for the first 1-3 seconds. It disappears once oil pressure builds.
- Cause
- Wear in the intake cam actuator (VVT-i) that makes it rattle until oil pressure locks it in place. Common on the 2JZ-GE VVT-i from the Altezza/IS300/Aristo after 200 000+ km. Neglected oil changes are often the root cause.
- How we fix it
- A new VVT-i actuator + new OCV (Oil Control Valve). Together with cylinder head reconditioning we replace both at the same time since they sit under the cam cover.
Rear main seal leaks
Common • Medium- Symptoms
- Oil drips between the engine and gearbox. Larger leaks after 250 000+ km. The car leaves oil marks in the garage.
- Cause
- The rear main seal ages and loses its interference fit. External PCV pressure from a clogged crankcase ventilation system accelerates the wear. On the GTE this is amplified by higher crankcase pressure under boost.
- How we fix it
- A new rear main seal (Toyota OEM or Elring) + a new flywheel O-ring. We measure the main journal runout at the same time, since wear there chews up the new seal.
Sequential turbo VSV failure (2JZ-GTE)
Common • High- Symptoms
- Constant overboost (10+ psi at low rpm), check engine, intermittent loss of power. At higher rpm: only one turbo works. The car feels sluggish below 4000 rpm.
- Cause
- The vacuum-controlled Variable Switching Valves (VSV) in the sequential twin-turbo system (CT20A/CT15A on JDM, CT12B on export) age and start to leak. The whole system with its Exhaust Gas Control Valve, Intake Air Control Valve and VSV solenoids loses the ability to schedule the turbos correctly.
- How we fix it
- A vacuum test of the whole system, replacing faulty VSVs and vacuum hoses. A common customer choice: skip the sequential fix entirely and convert to a single turbo or true twin parallel. We plan the conversion with you and rebuild the intake and exhaust.
Cracked exhaust manifolds (2JZ-GTE)
Common • Medium- Symptoms
- A ticking noise on cold start that disappears as the engine warms up. Later a constant exhaust leak in the form of a whistling sound, with soot marks on the manifold.
- Cause
- The OEM cast iron manifold on the 2JZ-GTE has a known tendency to crack between cylinders 5-6 and at the turbo flange. Thermal cycling + boost pressure wear it out over time.
- How we fix it
- Swap to an upgraded manifold (HKS, Greddy, or custom-built stainless). If needed we true the turbo flange before fitting. We NEVER recommend welding the OEM manifold - cast material cracks again.
Worn valve guides (high mileage)
Common at high mileage • Medium- Symptoms
- Blue smoke on cold start. Oil consumption of 0,5+ L per 1000 km with no visible leak. Declining power over time.
- Cause
- Natural wear at 300 000+ km. It wears faster with poor oil quality. Worst on the exhaust side (0,030-0,065 mm STD, MAX 0,10 mm per the FSM).
- How we fix it
- Cylinder head reconditioning with new guides (bronze sleeves or OEM), new valves if needed and fresh valve seats.
Cylinder wear & out-of-round (high mileage)
300 000+ km • High- Symptoms
- Rising oil consumption, loss of compression, blue smoke under acceleration. On the GTE this is amplified by boost load and any previous detonation.
- Cause
- The cylinder bore wears out-of-round over time, especially on a 2JZ-GTE that has lost ring seal after detonation. A block with the square 86×86 mm bore usually handles +0,5 mm oversize before sleeves are needed.
- How we fix it
- Measuring the bore + honing or boring to the next oversize. In severe cases: dry Darton MID sleeves that handle 1500+ hp.
2JZ rebuild prices
Workshop prices excluding VAT and parts. The final price depends on condition, variant (GE or GTE) and build spec. We give a firm quote after inspection.
Cylinder head reconditioning
Bottom end
Full rebuild
Performance build
Cylinder machining (6 cyl, 86 mm bore)
| Service | Price |
|---|---|
| Cylinder boring 6 cyl inline block (86 mm) | 4 977 kr |
| Plateau honing 6 cyl | 1 450 kr |
| Stress boring 6 cyl | 5 980 kr |
| O-ringing block 6 cyl | 3 600 kr |
| Deck resurfacing block 6 cyl | 2 700 kr |
Crankshaft work (7 mains + 6 rods, DOHC 14 cam journals)
| Service | Price |
|---|---|
| Crankshaft grinding (7 mains + 6 rods) | 5 000 kr |
| Polishing standard | 1 022 kr |
| Cleaning 6-cyl crankshaft | 920 kr |
| Straightening (large) | 1 400 kr |
| Camshaft journal grinding 14 (DOHC) | 4 312 kr |
| Remove/refit counterweights 12 | 3 066 kr |
Valve reconditioning (24 valves)
| Service | Price |
|---|---|
| Cutting 24 valve seats (standard) | 2 730 kr |
| Cutting 24 valve seats (large) | 4 158 kr |
| Valve guide replacement 24 (light alloy) | 3 822 kr |
| Manufacturing valve seat rings 24 | 4 620 kr |
| Bronze sleeves fitting 24 | 3 402 kr |
Resurfacing (I6, large cylinder head size)
| Service | Price |
|---|---|
| Cylinder head resurfacing 6 cyl (standard) | 1 800 kr |
| Cylinder head resurfacing 6 cyl (large) | 2 100 kr |
| Block resurfacing 6 cyl (standard) | 2 400 kr |
| Block resurfacing 6 cyl (large) | 2 700 kr |
| Manifold resurfacing 6 cyl (GTE turbo manifold) | 3 800 kr |
Connecting rod work (6)
| Service | Price |
|---|---|
| Small-end bushing replacement 6 (Ø22 mm piston pin) | 3 360 kr |
| Manufacturing small-end bushings 6 | 4 347 kr |
| Length adjustment connecting rod 6 | 4 347 kr |
| Press-fit piston replacement 6 | 2 373 kr |
| Piston ring replacement 6 | 1 659 kr |
| Big-end resizing 6 | 3 528 kr |
| Inspection/straightening connecting rod 6 | 2 121 kr |
| Full reconditioning connecting rod 6 | 4 746 kr |
| Shot peening connecting rods 6 | 3 402 kr |
Pressure testing & balancing
| Service | Price |
|---|---|
| Cylinder head pressure testing 6 cyl (small) | 2 814 kr |
| Cylinder head pressure testing 6 cyl (large) | 4 200 kr |
| Pressure testing cylinder block | 1 400 kr /h |
| Rotating assembly balancing inline 6 cyl | 5 100 kr |
| Weight matching connecting rods 6 | 1 974 kr |
| Weight matching pistons 6 | 1 638 kr |
| Flywheel balancing | 2 100 kr |
| Balancing flywheel + clutch | 2 842 kr |
Indicative prices for the 2JZ configuration (6 cyl inline, 86 mm bore, 24 valves, alloy cylinder head, cast iron block). Labour prices excl. VAT and parts (piston rings, bearings, gaskets, bolts). For the 2JZ-GTE we always recommend new ARP rod bolts on every rebuild - especially on the VVT-i GTE where the OEM rods are known to be weaker. Get a quote for an exact price after inspection.
Tuning the Toyota 2JZ
The 2JZ-GTE is one of the world's most proven tuning platforms. The bottom end handles double factory power or more without blinking.
- 1
Bolt-ons + ECU tune
Boost controller, ECU tune, downpipe, intercooler upgrade. Stock turbos in true-twin mode - if they have high mileage they should go through turbo reconditioning first. All on the factory bottom end.
400-450 hk - 2
Single big-turbo conversion
Garrett G35, Precision 6266 or similar - see our turbo upgrade. Fuel pump, 1000+ cc injectors, front-mount intercooler. Stock rods reliably handle up to ~600 hp.
500-600 hk - 3
Built bottom-end + forged internals
Forged pistons (Wiseco / CP-Carrillo), forged rods (Manley Turbo Tuff / Carrillo H-beam), ARP head studs + main studs. Requires cylinder boring, cylinder head resurfacing and crankshaft reconditioning. A larger single turbo (Precision 6870, Garrett G42), race-spec ECU.
700-900 hk - 4
Full race build
Forged pistons with custom CR for methanol/E85, a billet crankshaft at 1200+ hp, custom cam profiles (Brian Crower, GSC - or ground in-house via our cam grinding), porting of the cylinder head, dry sump, custom manifold. 2JZ builds have been clocked over 3000 hp in drag trim on the right setup.
1000-1500+ hk
Robert Wiklund has built 2JZ engines for drag and drift applications since the engine was introduced and plans your build personally - from an ECU tune on the factory bottom end to a complete race prep.
Toyota 2JZ questions & answers
What does a Toyota 2JZ rebuild cost?
A complete 2JZ rebuild costs 32 000 - 55 000 SEK for labour. The 2JZ-GTE runs a little higher due to the extra inspection of the piston-cooling oil squirters and the turbo system. Parts (piston rings, bearings, gaskets, ARP bolts for the GTE) are extra. We give a firm quote after inspection.
What are the most common 2JZ faults?
VVT-i actuator rattle (on VVT-i variants after 200 000+ km), a leaking rear main seal, sequential turbo VSV failure on the 2JZ-GTE, cracked OEM exhaust manifolds on the GTE and valve guide wear at high mileage. The bottom end is extremely durable - most faults sit up top or on the turbo system.
What is the difference between the 2JZ-GE and 2JZ-GTE?
The 2JZ-GE is the NA version with 10:1 compression and 220-230 hp. The 2JZ-GTE is the twin-turbo version with 8,5:1 compression, piston-cooling oil squirters and a beefed-up lubrication system - 280-330 hp from the factory (the official JDM gentlemen's agreement figure, real output often higher). The bottom end is identical in geometry but the GTE has different pistons and oil squirters.
How much power can a 2JZ-GTE handle on the factory bottom end?
Reliably 500-600 hp on stock rods and crankshaft with the right lubrication and fuelling. 700 hp is the point where OEM rods start to get unreliable under continuous use. For consistent performance over 700 hp you should build the bottom end with forged components.
Is the 2JZ an interference engine?
Yes. Both the 2JZ-GE and 2JZ-GTE are interference engines (pistons and valves can contact each other). A snapped timing belt typically means bent valves and the need for cylinder head reconditioning. The timing belt should be changed every 100 000 km or every 8 years, whichever comes first.
Can you build a 1000+ hp 2JZ?
Yes. We build 2JZ bottom ends with forged pistons, forged rods, ARP studs, larger valve springs and custom cam profiles. Robert has 30+ years of motorsport experience and has built performance engines for the likes of Toyota Team Europe. We validate on our own hub dyno. Budget 90 000+ SEK for a complete 1000-horsepower build incl. parts.
Do I need a complete engine to send it in?
No. We accept a short block, a cylinder head separately, or a complete engine. A common setup is to send just the short block + cylinder head by post, or drop it off at our Tyreso workshop. Contact us for a quote first and enclose your name, email and phone. We ship it back worldwide.
How long does a 2JZ rebuild take?
3-5 weeks from an approved quote to a finished engine. More complex performance builds (1000+ hp) take 6-10 weeks due to lead times on custom parts and the balancing required.
Have a 2JZ that needs rebuilding?
Call us or send a quote request and we will help you plan the build. We offer a 12-month warranty on all work.