Question 1

Oil Pump Drive Collar Failure (R32, R33, CRITICAL)

Accepted Answer

The engine loses oil pressure instantly and without warning. The oil pressure gauge drops to zero, the engine seizes within seconds. Total engine destruction. The RB26DETT oil pump is driven by a collar (sleeve) that fits over the crank snout. On R32 and R33 engines, this collar is made from relatively soft steel and is retained by a single roll pin. Under high RPM, the roll pin can shear or the collar can spin on the crank, causing the oil pump to stop turning. The engine loses oil pressure immediately and the bearings are destroyed within 10-15 seconds. Install an aftermarket hardened oil pump collar. Nismo and several aftermarket companies (Tomei, GReddy) produce upgraded collars with improved retention. The job requires removing the front timing cover and, on some configurations, the gearbox. Cost: $200-400 for the collar, $300-600 for labour. This is a non-negotiable modification for any R32 or R33 GT-R. It should be the first thing done on a newly purchased car if the history is unknown.

Question 2

Ceramic Turbo Wheel Failure (All Models)

Accepted Answer

Loss of boost on one or both turbochargers. In severe cases, ceramic wheel fragments are ingested by the engine, causing catastrophic damage to the cylinders and pistons. The factory T28 turbochargers use ceramic (silicon nitride) turbine wheels. Ceramic is lighter than steel, which gives faster spool-up, but it is brittle. Thermal shock (rapid temperature changes), over-boost, and age cause the ceramic to crack and eventually shatter. A shattered turbine wheel sends fragments through the exhaust manifold and, if the fragments pass through the wastegate, into the intake tract. Replace the factory ceramic-wheeled T28 turbochargers with steel-wheeled equivalents. Genuine Nissan steel-wheeled T28 replacements are available, as are aftermarket upgrades (Garrett GT2860RS is a popular direct replacement). Steel-wheeled turbos can handle higher boost and are not susceptible to thermal shock failure. Cost: $2,000-5,000 for a pair of quality replacement turbos, plus fitting.

Question 3

CAS (Crank Angle Sensor) Failure

Accepted Answer

Engine misfire, loss of power, intermittent cutting out, or complete no-start. The misfire may be random or consistent, and can come and go. The CAS is a magnetic pickup sensor located inside the front timing cover, driven off the exhaust camshaft. It provides the ECU with engine position data for ignition timing and fuel injection. The internal components wear with age and heat, and the signal becomes erratic. CAS failure is one of the most common problems on all RB26DETT engines. Replace the CAS. Genuine Nissan units are available ($300-500). Aftermarket trigger kits (which use a crank-mounted trigger wheel and external sensor) eliminate the CAS entirely and are more reliable for high-RPM applications. Cost: $300-600 for a CAS replacement, $500-1,500 for an aftermarket trigger kit.

Question 4

Head Gasket Failure

Accepted Answer

Coolant loss, white smoke from the exhaust, overheating, milky oil, and/or combustion gases in the coolant (detectable with a block tester). The factory multi-layer steel (MLS) head gasket is adequate for stock boost levels (0.55-0.7 bar) but is the first point of failure when boost is increased. The RB26's long, slender head is prone to lifting between cylinders under high boost, which breaks the gasket seal. Even on stock cars, age and thermal cycling can cause the gasket to fail after 200,000+ km. Replace the head gasket. On a stock engine, a genuine Nissan MLS gasket is adequate. On a modified engine (above 1.0 bar boost), an aftermarket metal gasket (Tomei, HKS) with head studs (replacing the factory bolts) is required. The head must be checked for flatness and machined if necessary. Cost: $1,500-3,000 all-in for a stock replacement, $3,000-5,000 for an upgraded gasket with studs.

Question 5

Coil Pack Failure

Accepted Answer

Misfire on one or more cylinders, rough idle, loss of power. The RB26DETT uses individual coil packs for each cylinder (coil-on-plug design on R33 and R34, coil-and-lead design on R32). The coil packs deteriorate with age and heat. The R32's coil pack leads are particularly susceptible to insulation breakdown. Replace the coil packs. Genuine Nissan units are available, as are aftermarket upgrades (Splitfire, HKS). Replace all six at once, if one has failed, the others are not far behind. Cost: $400-800 for a set of six.

Question 6

Injector Issues

Accepted Answer

Rough idle, misfire, rich or lean running on individual cylinders. The factory Nismo 440cc injectors are good quality but can become clogged or develop leaking seals after decades of service. The injector O-ring seals harden and leak fuel, causing a rich condition and fire risk. On modified cars with larger injectors, incorrect sizing or poor tuning causes drivability issues. Have the injectors professionally cleaned and flow-tested ($150-250 for a set of six). Replace O-ring seals ($20-40 for a set). If the injectors are beyond cleaning, Nismo 740cc or 1000cc injectors are the standard upgrade for modified engines. Cost: $600-2,000 for a set depending on size.

Question 7

Boost Leaks

Accepted Answer

Sluggish acceleration, reduced boost pressure, the car feels slow despite the turbos appearing to spool. The RB26's factory intercooler piping uses rubber joins with worm-drive clamps that deteriorate with age and heat. The factory intercooler end tanks can crack. The blow-off valve (BOV) diaphragm wears. Vacuum lines crack and leak. Any leak in the pressurised intake system reduces the boost reaching the engine. Perform a boost leak test: pressurise the intake system to 15-20 psi with the engine off and listen/feel for leaks. Replace all rubber joins ($50-100 for a set), upgrade clamps to T-bolt style ($30-50 for a set), and inspect the intercooler for cracks. Replace the BOV diaphragm or upgrade to an aftermarket BOV ($100-400). Cost: $200-600 for a complete refresh.

Question 8

Wastegate Actuator Wear

Accepted Answer

Over-boosting (boost exceeds the set level), erratic boost control, or inability to maintain target boost. The factory wastegate actuators use a diaphragm and spring that weaken with age and heat. The actuator rod and pivot point wear, introducing slop. On a stock car, this can cause boost to creep above the factory 0.55-0.7 bar target. Replace or rebuild the wastegate actuators. Aftermarket actuators with adjustable preload are available. An aftermarket electronic boost controller (Turbosmart, HKS, GReddy) provides far more precise boost control than the factory system. Cost: $200-500 for actuators, $300-800 for an electronic boost controller.

Question 9

ATTESA E-TS Faults

Accepted Answer

ATTESA warning light on the dashboard. The car may default to rear-wheel drive only, losing the all-wheel-drive functionality that defines the GT-R's handling character. Common causes include: low transfer case fluid (the most common and easiest fix), a failed G-sensor (mounted under the centre console, detects yaw and lateral acceleration), a faulty ATTESA control unit (ECU), or worn clutch packs in the transfer case. Start with a transfer case fluid change (Nissan-specified ATF, 1.5L capacity). If the light persists, diagnose with a Consult scanner. G-sensor replacement: $200-500. Transfer case rebuild: $1,500-3,000. ATTESA ECU replacement: $500-1,500 (used).

Question 10

HICAS Malfunction

Accepted Answer

HICAS warning light on the dashboard. Rear-end instability at speed, vague rear-end feel, or the rear appearing to steer independently of the front. The R32 and R33 use a hydraulic HICAS system with a rear steering rack actuated by a hydraulic pump. Hose leaks, pump failure, and rack seal failure are common. The R34 uses an electronic HICAS system that is more reliable but still develops faults in the electric motor and sensor circuitry. Many owners choose to delete HICAS rather than repair it. A HICAS delete kit ($200-400) replaces the rear steering rack with fixed-length tie rods, eliminating the system entirely. This is widely regarded as an improvement for spirited driving and track use. If you want to retain HICAS, a full system overhaul costs $1,000-2,500.

Question 11

Gearbox Synchro Wear

Accepted Answer

Grinding or crunching when shifting, particularly into 2nd, 3rd, or 4th gear. Worse when cold or on quick shifts. The Getrag manual gearbox is strong but the synchro rings wear with enthusiastic use. Drift-oriented driving (lots of clutch kicks and quick shifts) accelerates wear dramatically. Gearbox rebuild with new synchro rings, bearings, and seals. Cost: $2,000-4,000. A replacement gearbox from a wrecker is an alternative: $2,000-5,000 depending on condition.

Question 12

Overheating Under Track Use

Accepted Answer

Coolant temperature climbs rapidly under sustained high-load driving (track days, spirited mountain driving). The factory cooling system struggles above 110 degrees C. The factory radiator is marginally sized for the heat output of the RB26DETT at full boost. The factory thermostat opens at 76.5 degrees C, which is fine for street driving but too warm for track use. Modified cars producing more boost and power generate significantly more heat. Upgrade to an aftermarket aluminium radiator with greater capacity ($400-800). Install a lower-temperature thermostat (68 degrees C). Add an oil cooler if not already fitted, the RB26 benefits significantly from an oil cooler under track conditions. Cost: $1,000-2,500 for a complete cooling upgrade.

Question 13

AFM (Airflow Meter) Contamination

Accepted Answer

Rough idle, hesitation on acceleration, poor fuel economy, rich or lean running. The GT-R uses twin hot-wire airflow meters (one for each turbo). The hot-wire elements become contaminated with oil vapour from the PCV system and general intake air contamination. The contaminated element gives incorrect readings, causing the ECU to miscalculate fuel delivery. Clean the AFMs with MAF sensor cleaner spray ($15-20 per can). Do not touch the hot-wire element with anything, only spray cleaner. If cleaning does not resolve the issue, replacement AFMs are required: $300-500 each. Many modified cars delete the AFMs entirely and run a MAP (Manifold Absolute Pressure) sensor-based tune instead.

Question 14

ECU Capacitor Failure (R32)

Accepted Answer

Erratic engine behaviour, random fault codes, intermittent cutting out, or complete ECU failure. The R32 GT-R's factory ECU uses electrolytic capacitors that deteriorate with age. After 30+ years, these capacitors leak electrolyte onto the circuit board, causing corrosion and short circuits. Have the ECU recapped, a specialist replaces all electrolytic capacitors with new, high-quality components. Cost: $200-400 at an electronics specialist. This is preventive maintenance that should be done on every R32 GT-R regardless of symptoms.

Question 15

Rear Quarter Panel Rust

Accepted Answer

Rust visible behind the rear wheels, often starting as bubbles under the paint. In advanced cases, the rear quarter panel is perforated. Road spray from the rear wheels is trapped between the inner and outer quarter panel skins. Japanese road salt accelerates the process. Many grey-imported GT-Rs have spent years in salted Japanese conditions before arriving in Australia. Cut out affected metal and weld in repair panels. The rear quarter is a structural panel, so repairs must be done properly. Professional repair: $2,000-5,000 per side depending on severity.

Question 16

Boot Floor Corrosion

Accepted Answer

Rust in the boot floor, visible when the carpet and spare wheel are removed. Water ingress through the boot seal and taillight seals. Trapped moisture corrodes the floor from both sides. Replace the boot seal and taillight seals. Treat surface rust with converter. Patch or replace perforated sections. Cost: $500-2,000 depending on severity.

Skyline GT-R (R32 / R33 / R34)

Skyline GT-R (R32 / R33 / R34) known problems