Models · Porsche
Porsche 911 GT3 996 buying guide
The 996 GT3 launched in 1999 with a naturally aspirated 3.6 Mezger flat six, a six-speed manual and rear-wheel drive. The facelifted 996.2 GT3 brought more power and revised aerodynamics, and was joined by the lightweight GT3 RS.
The versions
- 996.1 GT3 (from 1999): 3.6 naturally aspirated flat six, 360PS, 7,800rpm limit
- 996.2 GT3: 381PS, 8,200rpm limit, revised headlights, rear lid and wing
- 996.2 GT3 RS: 381PS, 682 built
- Six-speed manual only, rear-wheel drive, on the narrow body
- Carbon ceramic brakes were an option
What to check on a 996 GT3
3 model-specific things to look at when you view one. They're a starting point, not the full inspection.
Coolant pipe fittings
What to look for: Ask whether the engine's coolant pipe fittings have been pinned or welded, and look for the invoice. Check the coolant level and look under the back of the car for coolant residue. Ask about any overheating.
Why it matters: On the Mezger engine, the aluminium tubes that carry the coolant hoses were glued into the coolant housings. Heat cycling and overheating can loosen them, and a tube can let go suddenly. Securing them needs the engine out, so a car already done is a real plus.
The dual-mass flywheel and clutch
What to look for: On the drive, gently accelerate and lift off a few times in a low gear and feel for free play or a clunk in the drivetrain. Note where the clutch bites, and ask when the clutch was last replaced.
Why it matters: The standard GT3 has a dual-mass flywheel, which wears in the usual way. Specialists suggest replacing it along with any new clutch. Some owners fit the lightweight single-mass RS flywheel and clutch instead, which makes the gearbox noisier by nature.
Valvetrain noise
What to look for: With the engine warm, listen at the engine lid at idle and with gentle revs for clattering or rattling from the top of the engine. Ask about track use.
Why it matters: Cars that have seen a lot of track time can develop valvetrain noise from the cam timing actuators. Specialists treat that as a sign the engine needs a full rebuild, so it's one to have assessed before buying.
Also in the full guide
- Front suspension squeaks
- Radiators and the coolant expansion tank
- Track use and servicing
- The cold start, test drive and paperwork checks for the exact version you're viewing
The full guide to the 996 GT3
The CrankSight guide walks you round the car on your phone at the viewing, with every check for the exact version you're looking at: what to look for, where to find it, and what anything you find is likely to cost. As you go it builds an assessment of that car, and if you view more than one, it lines them up side by side.
£29 for the model, used on as many cars as you like, delivered within 72 hours or your money back.
Other generations
Porsche 911 GT3 991 · Porsche 911 GT3 992 · Porsche 911 GT3 997
General points for the model, last checked October 2026. Every car is different, so treat this as a guide to what to look at, not a verdict on any car. CrankSight is independent and has no connection with Porsche.