2004 Porsche 911 gt3 problems

General information about Porsche-911 gt3
Overview of popular issues

The Porsche 911 GT3 is a high-performance homologation model of the Porsche 911 sports car. It is a line of high-performance models, which began with the 1973 911 Carrera RS. The GT3 has had a successful racing career in the one-make national and regional Porsche Carrera Cup and GT3 Cup Challenge series, as well as the international Porsche Supercup supporting the FIA F1 World Championship.

Road cars

996 GT3

911 GT3

The "GT3" nameplate was introduced in 1999 as part of the first generation of the Porsche 996 model range (commonly known as 996.1) as a homologation model for the cars entered in the FIA GT3 cup. As with Porsche's previous 911 RS models, the 996 GT3 was focused on racing, and so was devoid of items that added unnecessary weight to the car. Sound deadening was almost completely removed, as were the rear seats, rear loud speakers, sunroof, and air conditioning, although automatic air conditioning and CD/radio became no-cost optional add-ons.

The engine of the 996 GT's and Turbo set it apart from 996 Carrera models, as it shared nothing with the standard so-called "integrated dry sump" (eg. wet-sump) flat-six engine used in the water-cooled 996 Carrera engine introduced in MY1999. The 996 GT engine is naturally aspirated and based on "The Mezger" racing engine used in the 962 and 911 GT1 race cars. That engine was known as the 'Mezger' engine, after its designer Hans Mezger. The engine uses the original air-cooled 911's versatile dry-sump crankcase, with an external oil reservoir. The 996 GT3 has 360 PS (265 kW; 355 hp), compared to the 300 PS (221 kW; 296 hp) of the standard 996. In GT3 configuration, this so-called "split" crankcase (meaning the parting line of crankcase is on the crankshaft centreline) uses, instead of a fan and finned cylinders, separate water jackets added onto each side of the crankcase to cool banks of three cylinders with water pumped through a radiator. Thus, the GT3 engine is very similar to the completely water-cooled 962 racing car's engine, which is based on the same crankcase. The 962 differs, however, by using six individual cylinder heads while the "Mezger" (GT1 engine block) uses two cylinder heads, each covering a bank of three cylinders. The GT3 engine could thus also be thought of as similar to a 959 engine, but with water-cooled crankcase. Up until model year 2004 996 production, the basic casting used for the "Mezger" crankcase of the GT3 was the same as the 996 GT1 LeMans cars, and the same "964.." block part-number is visible on the bottom of the crankcase. Beginning with MY2004 however, production was outsourced to Valmet facilities in Spain, France, and Austria, and all subsequent road-legal Mezger engines are part-numbered "996.." (even 997 Generation).

Because the GT1 Mezger block uses the same legacy Porsche 356 engine to transmission mounting flange configuration, the 996 GT3 used a 6-speed manual gearbox also of air-cooled 911 heritage. This new G96/50 gearbox has interchangeable gear ratios and is more durable making it more suitable for racing than the standard type 996 Carrera's gearbox.

To bring the vehicle's track-prowess to the maximum level, Porsche endowed the GT3 with enlarged brakes, a lowered, re-tuned suspension system, lighter-weight wheels and a new front bumper with matched rear spoiler to help increase downforce, thereby increasing grip.

Porsche offered a no-cost option for the GT3 called the 'Clubsport' package. This option replaced the standard electrically adjustable leather front seats with manually adjustable racing bucket seats finished in fire-retardant fabric, single mass flywheel, bolt-in half-roll cage, 6-point drivers racing harness (also replacing the standard side airbags), fire extinguisher (mounted in the front passenger footwell) and preparation for a battery master switch. The Clubsport option was never offered to US customers, ostensibly due to the additional DOT crash testing that would have been required to allow US sales.

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Common 2004 Porsche 911 gt3 problems

Based on the sources provided, here are some common problems with the Porsche 911 GT3 2004 model based on complaints from owners:

IMS Bearing: The Porsche 996 series, including the GT3, is known for IMS bearing issues that can lead to total engine failure if not addressed. Upgrading the IMS bearing is crucial to prevent catastrophic engine damage and ensure the longevity of the vehicle.

These are some of the common problems reported by owners of the Porsche 911 GT3 2004 model, highlighting areas where maintenance and upgrades can help address these issues effectively.

What is the problem with the 911 GT3?

Problems with the 991.1 GT3's 3.8-liter engine were apparent right from the start. Shortly after the release of the car, Porsche issued a recall for all GT3 models in March 2014. That notice came as a result of loosened screw joints on the connecting rods. The issue ultimately caused two cars to suffer engine fires.

How many 2004 Porsche GT3 were made?

682

Porsche 911 GT3 Production Build Numbers

Car	Years of	Units Built
996.1 GT3	1999–2001	1,868
996.2 GT3	2003–2005	2,313
996.2 GT3 RS	2003–2004	682
997.1 GT3	2006–2009	2,378

What are the pros and cons of a Porsche GT3?

2024 Porsche 911 GT3 / GT3 RS

Highs Sharp chassis reflexes, outrageous performance, expertly tuned flat-six engine.
Lows Hedge-fund manager price tag, difficult choice between the wild RS or subdued Touring models, stiff-legged ride on RS model.

What is the top speed of the Porsche 911 GT3 2004?

The GT3 had a maximum speed of 302 km/h. The GT3 was available with a Clubsport Package for use in motorsport. From model year 2003 onwards, the revised engine delivered even more power and reached a maximum speed of 306 km/h. The 911 GT3 RS, launched in model year 2004, was designed as a road-approved racing car.

2004 Porsche 911 gt3 complaints

The NHTSA has received 0 complaints about various vehicle components related to the 2004 Porsche 911 gt3.

You can leave your car complaint via the special form below.

Additional sources

More sources of information about 2004 Porsche 911 gt3 problems:

What are the chances of a IMS failure in a 2004 Porsche 911 ...

https://www.quora.com/What-are-the-chances-of-a-IMS-failure-in-a-2004-Porsche-911-Carrera

Jun 7, 2016 ... The 996 and 997 series cars (except Turbo, GT2 and GT3 variants, which use an older engine block design) are prone to serious engine issues that ...

Are 911's really that reliable? : r/cars

https://www.reddit.com/r/cars/comments/s0xoom/are_911s_really_that_reliable/

Jan 10, 2022 ... I recently read a JD Power article about brand reliability and it said that Porsche ranked second or third I think. I've always wanted a 911 ...

997 Gt3 /RS owner beware of coolant issues | Porsche 911 UK ...

https://911uk.com/threads/997-gt3-rs-owner-beware-of-coolant-issues.34884/

Oct 2, 2010 ... 2004 ? So is this a 996 worry aswell ? Current - looking for something cheap for the summer..

IMS bearing... (yes, really) - Rennlist - Porsche Discussion Forums

https://rennlist.com/forums/996-gt2-gt3-forum/1250546-ims-bearing-yes-really.html

May 10, 2021 ... 996 GT2/GT3 Forum - IMS bearing... (yes, really) - My mechanic just called to tell me that my intermediate shaft bearing is failing, ...