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996.2 · 2002–2005 HaloManual only

2004 Porsche GT2

3.6 L flat 6 turbo · RWD · Coupe · water-cooled

Power
477hp
Torque
457lb-ft
0–60
3.8s
Weight
3,175lb
lb / hp
6.7
Displacement
3.6L

Specification

US-market 2004
Power 477 hp
247 700
Weight 3,175 lb
2,910 3,640
Weight to power 6.7 lb/hp
4.6 lower is quicker 13.0

Where this car sits against every 911 in the catalog.

Engine
Engine code M96.70E
Layout flat 6, water-cooled
Displacement 3.6 L
Aspiration Twin-turbocharged
Power 477 hp @ 5,700 rpm
Torque 457 lb-ft @ 3,500 rpm
Redline 6,750 rpm
Specific output 133 hp / L
Chassis & body
Drivetrain Rear-wheel drive
Body styles Coupe
Transmissions 6-speed Manual
Curb weight 3,175 lb
Wheelbase 92.6 in
Length 174.5 in
Width 72.0 in
Height 50.4 in
Performance & market
0–60 mph 3.8 s
Top speed 198 mph
Weight to power 6.7 lb / hp
MSRP when new $181,000 base

About the 2004 GT2

2004GT3 finally sold in the US with 380 hp. Turbo Cabriolet added, and the 40th Anniversary Edition arrives with the X51 kit and 345 hp.

GT2Rear-drive Turbo with more boost, less weight and no stability net. Widowmaker reputation is earned.

Known issues

3 Specific to the GT2

Glued coolant pipe separation

Critical $1,500–$3,000
Affects

996 Turbo, Turbo S and GT2.

What happens

Coolant pipes in the engine bay are bonded rather than welded. Under heat and pressure the joints let go, dumping coolant with no warning and risking an overheat before the driver can stop.

Symptoms
  • Sudden coolant loss
  • Temperature spike under sustained load
  • Coolant pooling at the rear of the car
What to do

Pin-and-weld the pipes preventively. Standard practice on any Mezger-engined car that is driven hard, and worth confirming in the service history before purchase.

Parts for this job

Ignition switch failure

Minor $250–$600
Affects

All 996 and early 986, subject of a service campaign.

What happens

The electrical portion of the switch fails, leaving the car dead or unable to shut off.

Symptoms
  • No crank, no dash lights
  • Key turns with no response
  • Car will not shut off with the key
What to do

Replace the switch — an inexpensive part behind moderate labor.

Parts for this job

Radiator debris and corrosion

Minor $900–$2,400
Affects

All 996, worst in road-salt and leaf-litter regions.

What happens

The front radiators sit low and collect leaves and grit that hold moisture against the cores. Corrosion follows, then leaks, then A/C condenser damage behind them.

Symptoms
  • Slow coolant loss with no visible leak
  • A/C performance drop
  • Debris visible through the bumper ducts
What to do

Clean the ducts annually, fit radiator grilles. Replace both radiators and condensers together once they start weeping.

Parts for this job
Does not affect this car

IMS bearing failure, Rear main seal leak, Cylinder bore scoring, Air–oil separator failure — documented elsewhere in the 996.2 range but not applicable to the GT2. See the generation overview for the full picture.

Service intervals

11
Item Interval
Engine oil and filter 5,000 mi or annually
Spark plugs 30,000–40,000 mi
Serpentine belt 4 years / 40,000 mi
Coolant 4 years
Brake fluid 2 years
Clutch 60,000–100,000 mi
Transmission fluid 60,000 mi
Air–oil separator On failure
Coolant pipe pin-and-weld Once, preventively
Valve clearance check Per factory schedule
Suspension bushings and mounts 80,000+ mi

What fits this car

36 Sizes, capacities and part specs

The answers you need when something has already failed — bulb sizes by position, wiper lengths, battery group, fluid specs and capacities. Sizes are for US-spec cars and are a starting point: options and mid-year changes move them, so check against your own car and its VIN before ordering.

Bulbs

13 Positions and sizes for US-spec cars. Xenon cars differ at the low beam.
Low beam — halogen H7 55W ✓ Cars without the Litronic xenon option. Shop →
Low beam — Litronic xenon D2S 35W ✓ Factory xenon option. Do not fit an HID kit into a halogen housing — the reflector is the wrong shape and it blinds oncoming traffic. Shop →
High beam — halogen (996.2) H9 65W ✓ The facelift changed the high beam from H7 to H9. Ordering H7 for a 2002-on halogen car is a common and easy mistake. Shop →
High beam — Litronic cars H7 55W ✓ Xenon cars keep a halogen high beam. Shop →
Front turn signal PY21W Amber. A silver-coated bulb keeps the lens looking clear when off. Shop →
Front position / parking W5W Shop →
Fog light H3 55W ✓ Shop →
Brake / tail P21/5W Dual filament — one bulb serves both. Shop →
Rear turn signal PY21W Shop →
Reverse P21W Shop →
Licence plate W5W Shop →
Side marker W5W Shop →
Interior / map Festoon C5W 36 mm Shop →

Wiper blades

3
Driver side 24 in Shop →
Passenger side 24 in Shop →
Rear Not fitted No rear wiper on the 996 coupe or cabriolet. —

Battery

3
Group size Group 48 (H6) Confirm tray and terminal orientation before ordering — some cars were built with a taller case. Shop →
Minimum cold cranking amps 680 CCA —
Terminal layout Positive on the right, viewed from the front of the car —

Fluids and capacities

8 Capacities are approximate service fills, not dry-rebuild volumes.
Engine oil — capacity 8.7 qt (8.25 L) with filter ✓ Fill to the dipstick, not to the number — the M96 reads accurately only when warm and level. Dry fill is 12.5 L, which is not what you need for a service. —
Engine oil — specification 0W-40, Porsche A40 approved Shop →
Coolant — capacity 23.8 qt (22.5 L) ✓ Roughly 5.9 US gallons. —
Coolant — specification Porsche pink G40, phosphate-free Do not top up with universal green. Mixing chemistries in an aluminium and plastic system is a slow, expensive mistake. Shop →
Brake fluid DOT 4, low viscosity Shop →
Manual transmission 2.6 qt, 75W-90 GL-5 Shop →
Power steering Pentosin CHF 11S Shop →
Fuel tank 16.9 gal 23.7 gal on cars with the optional long-range tank. —

Wheels and tyres

5
Bolt pattern 5 x 130 mm
Centre bore 71.6 mm
Lug bolt thread M14 x 1.5
Tyre size — 18 in front 225/40 ZR18
Tyre size — 18 in rear (wide body) 295/30 ZR18

Torque values

4 Critical fasteners. Verify against factory documentation before relying on any of these.
Wheel lug bolts 96 lb-ft (130 Nm) ✓ All 996 variants. Star pattern, on the ground, calibrated wrench, and re-check after a short drive.
Engine oil drain plug 37 lb-ft (50 Nm) ✓ New crush washer every time.
Oil filter housing cap 25 Nm (18 lb-ft) ✓ The figure is moulded into the cap. Do not over-tighten into the aluminium housing.
Spark plugs 22 lb-ft (30 Nm) ✓ New plugs. Reused plugs go to 19 lb-ft (25 Nm). No anti-seize — Porsche prohibits it per technical bulletin 9102.

Fitment for the 2004 996.2 GT2. Torque values in particular are safety-relevant — verify against factory documentation rather than relying on this page alone.

Buying guide

7
  1. 01

    Cut the oil filter open

    Ferrous glitter or bearing material in the pleats is a walk-away signal. Bring a filter cutter to the PPI or ask the shop to do it in front of you.

  2. 02

    The Mezger engine is not the worry — the bill is

    The GT1-derived engine is genuinely robust, but everything around it is priced as a halo car. Plugs, clutch, brakes and tyres all cost a multiple of Carrera money, and specialists who will touch one are fewer.

  3. 03

    Confirm the coolant pipes are pinned

    Ask for the invoice. An unpinned car is not a deal-breaker but it is a known job you will be paying for, and an overheat while you wait is the expensive outcome.

  4. 04

    Assume track use until proven otherwise

    These cars were bought to be driven hard. Look for roll bar mounting holes, harness wear, fresh-but-mismatched brake hardware and a suspiciously recent engine-out service. Track use is not disqualifying; undisclosed track use is.

  5. 05

    Price the ceramic brakes before you buy

    A full PCCB replacement can approach the value of a running Carrera. Measure disc wear at inspection and budget accordingly, or find a car on steel.

  6. 06

    Value the boring stuff

    Recent clutch, recent radiators, fresh suspension bushings and a thick folder of independent-specialist invoices are worth more than low miles and a detail job.

  7. 07

    Colors and options move the price

    Manual over Tiptronic, sport seats, and a color that is not silver or black all matter to the next buyer more than they should.

Parts and gear

22 Chosen for this car, not for the commission

What a GT2 actually costs to keep, grouped by why you would buy it. Prices are typical US parts-only figures — labour is separate, and the DIY note says whether that matters. Where a link earns us a commission it costs you nothing and never changes what appears here.

Parts that fix a known problem on this car

6 Each one maps to an issue above
  • Cooling $500–$1,100

    Radiator and condenser pair

    Once the cores start weeping there is no repair. Replace radiators and the condensers behind them as a set while the bumper is off — doing one side, or doing radiators without condensers, means paying the same labour twice.

    FCP Euro → Shop job
  • Cooling $120–$260

    Coolant expansion tank

    The plastic tank goes brittle with heat cycles and splits, usually at the seam, usually without warning. Almost every 996 needs one eventually. Do it with the cap and the level sensor.

    FCP Euro → DIY or shop
  • Cooling $200–$480

    Water pump and thermostat

    The original plastic impeller degrades and can shed into the cooling system. Fit a pump with a metal or upgraded impeller and change the thermostat at the same time — the labour overlaps almost entirely.

    FCP Euro → DIY or shop
  • Electrical $40–$100

    Ignition switch

    A genuinely cheap part behind moderate labour, and the reason for a great many "dead 996" forum posts. Worth carrying the part before the failure strands you rather than after.

    FCP Euro → DIY or shop
  • Interior $50–$160

    Door handle repair kit

    The interior door pull mechanism is a known breakage. Repair kits and reinforced replacements cost a fraction of the factory assembly and fix it permanently.

    FCP Euro → DIY
  • Exterior $150–$450

    Headlight lens replacement

    The 996 lenses cloud and craze with age, which ages the whole car more than any other single thing. Replacement lenses restore the look without touching the housings or the aim.

    FCP Euro → DIY

Worth doing before it fails

7 Cheaper than the repair it avoids
  • Cooling $90–$200

    Radiator grille screens

    The reason the radiators above rot. Mesh inserts in the bumper ducts stop the leaf litter and grit that hold moisture against the cores. A hundred-dollar part guarding a two-thousand-dollar repair, and it fits in an afternoon with the bumper on.

    Shop this → DIY
  • Turbo $150–$400

    Coolant pipe pin-and-weld kit

    Pins and hardware for permanently securing the bonded coolant pipes on a Mezger car. The parts are cheap; the labour is not, and neither is the overheat you get without them.

    FCP Euro → Shop job
  • Engine $110–$210

    Low-temperature thermostat

    Opens earlier and holds the engine meaningfully cooler in traffic and on track. Widely fitted on M96 cars by owners who would rather run cool than argue about whether it prevents bore scoring. Cheap, reversible, and it makes the temperature gauge tell you something.

    Shop this → DIY or shop
  • Engine $25–$60

    Magnetic drain plug

    Catches ferrous debris where you will actually see it, every oil change, for the price of a tank of fuel. Paired with a cut-open filter this is the cheapest engine-health monitoring that exists for an M96.

    Shop this → DIY
  • Ignition $250–$480

    Coil pack and spark plug set

    Six coils and six plugs. Coils fail on age rather than mileage, so replacing them as a set with the plugs turns a future roadside misfire into a scheduled afternoon.

    Shop this → DIY
  • Chassis $150–$400

    Engine and transmission mount set

    Twenty-year-old mounts sag and let the drivetrain move, which reads to the driver as vagueness and vibration rather than as a broken part. Replacing them restores the directness people buy these cars for.

    FCP Euro → DIY or shop
  • Chassis $300–$750

    Front control arm and bushing kit

    Tired bushings quietly ruin the steering feel that is the whole point of a hydraulically-steered 911. This is the single most transformative suspension spend on a high-mileage car, and it is invisible on a test drive until you drive a fresh one.

    FCP Euro → Shop job

Consumables you will rebuy

5 Ordinary running costs
  • Fluids $70–$140

    Porsche-approved engine oil

    The M96 is specific about weight and additive package, and this engine is not the place to save eight dollars. Roughly nine quarts a change, and on a shortened interval that is the most-repeated purchase a 996 owner makes.

    Shop this → DIY
  • Fluids $15–$45

    Oil filter and sump hardware

    Bought with every oil change, and the thing you cut open afterwards. Get the crush washers in the same order.

    Shop this → DIY
  • Fluids $30–$80

    Porsche-spec coolant

    The correct pink specification, not universal green. Mixing chemistries in an aluminium and plastic cooling system is a slow, expensive mistake.

    Shop this → DIY
  • Fluids $15–$60

    Brake fluid

    Two-year replacement, annual if the car sees track use. A high-temperature fluid is the cheapest brake upgrade there is.

    Shop this → DIY
  • Service $25–$70

    Cabin and engine air filters

    Both are ten-minute jobs that shops charge properly for. Buy them together with the oil.

    Shop this → DIY

Tools worth owning

4 Bought once, used for years
  • Diagnostics $250–$1,000

    Porsche-specific diagnostic interface

    A generic code reader sees a fraction of what a 996 stores. A Porsche-specific tool — Durametric is the long-standing owner choice — reads every module, shows actual fault history and lets you clear an airbag light without a dealer visit. It pays for itself on the second use.

    Shop this → DIY
  • Inspection $30–$80

    Oil filter cutter

    Opens the filter so you can spread the pleats and look for metal. The single cheapest early warning an M96 owner has, and it works for the life of the car.

    Shop this → DIY
  • Lifting $150–$420

    Low-profile jack and jack pads

    A standard trolley jack will not fit under the sill, and the jack points crush without a proper puck. Buy the pads with the jack — people always come back for them.

    Shop this → DIY
  • Storage $50–$130

    Battery tender

    These cars have a real parasitic draw and hate sitting. A flat battery can also scramble the alarm module, turning a dead battery into a diagnostic appointment.

    Shop this → DIY