How common is bore scoring 997?
While cylinder bore scoring has been an issue on a relatively small percentage of 996 and 997 models, it isn't a universal problem.
Change your engine oil once a year or every 3-5k miles. Have an engine oil analysis performed by SPEEDiagnostix at every engine oil change. Utilize a high-quality boutique type of synthetic engine oil such as Joe Gibbs Driven DT series or Motul 8100 X-Cess.
Unfortunately, any engine with a hypereutectic engine block can suffer from cylinder bore scoring, not just the M96/M97 engine used in Porsche Boxster, Cayman, and 911 models.
Change oil at the recommended intervals – It's important to change your car's engine oil every 6 months or 5,000 miles, preferably with Driven DT40 or DI40 as these oils are formulated with increased levels of Moly additives that most oils do not have, which in turn helps to protect the cylinder walls.
Porsche 997.2 Carrera 2 S: A Brief
The 997 generation Porsches saw a run from 2004 to 2012. In that, the production run was split between the 997.1 (2004-2008) and 997.2 generation (2009-2012) 911s. Firstly, the 997 brought back the original round headlights instead of the disfigured ones found in the 996.
In general, scoring of the cylinder wall and piston skirt first presents itself as scuffing that then, over time, leads to scoring. There are a number of main reasons for this to occur which include: Poor fit of piston to bore. Wrist pin walking out of pin bore.
What Is the IMS Bearing. The Porsche IMS (stands for intermediate shaft) is a geared shaft that runs through the front and rear of the engine. It indirectly drives the camshafts on either side of the engine by way of the mechanical rotation of the engine's crankshaft. The actual shaft itself was not the problem.
Although biral cylinders are a significant upgrade over cast iron cylinders, Porsche started using solid aluminum cylinders all the way back in 1951 in its production cars, before cast iron and later biral-type cylinders were first used on later Porsche 356 and 912 models followed by 2.0 through 2.4 liter 911 models.
A scoring engine is an executable that has a well-defined input, a well-defined output, and performs a purely mathematical task. That is, the calculation does not depend on the environment in which it is running— it would produce the same result anywhere.
Porsche 997 is the internal designation for the Porsche 911 sports car manufactured and sold by the German automobile manufacturer Porsche between 2004 (as Model Year 2005) and 2013.
What is a 996 Porsche?
The Porsche 996 is the internal designation for the 911 model manufactured by the German automaker Porsche from 1997 until 2006. It was replaced by the 997 in 2004 but the high performance Turbo S, GT2 and GT3 variants remained in production until 2006.
The Porsche 997 has been the first of the modern 911s, which took its design inspiration from the classic 911 again. With the oval shaped headlights, it is already considered as a future classic.
Comparatively rare, especially with the more desirable six-speed manual transmission, the 997 GTS is a car that looks likely to hold its value well. It may not be an investment per se, but this is a car you buy to drive and enjoy, and enjoy it you will.
Like many modern, second-hand 911s, prices of the 997 base models have been falling ever since they left an OPC forecourt. However, the depreciation on both Gen1 and Gen2 variants is slowing up, so we went to two 911 specialists to find out how low 997 Carrera prices are expected to go.
A minor change in piston-to-wall clearance can be considered normal, but changes in the piston-to-wall clearance of more than 0.002-inch should be considered a good excuse for a change.
JB Weld scored cylinder repair PART 1 - YouTube
The amount of Material Removal when Honing(abrasive flow machining) can be controlled to remove as little as . 001” and will depend on target set by customer. The rougher the starting surface finish is, the more material removal will be needed to achieve the best finish possible."
Porsche has been at the center of a recent controversy due to IMS (intermediate shaft) bearing failure in some 997 production cars, but recent data shows that there may not be as many problems as initially thought.
The cost of a IMS Retrofit replacement bearing and labour for installation is usually more than $4,000 but can be done in conjunction with the clutch. This is a small investment compared to the cost of rebuilding or replacing the entire engine.
Porsche upgraded the IMS along with the design of the IMS bearings on 2007 model year cars onwards. For the Porsche engines fitted from 1998 to 2006/07, there have been many aftermarket solutions to address the issue We have fitted and assessed many of these solutions.
Are all Porsche engines flat?
Most of the sports cars produced by Porsche since its inception in 1948 have used the flat-four engine or its sister variant, the flat-six engine. The Boxster and Cayman models use the flat-four boxer engine while the 911 models have the flat-six engines.
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Porsche flat-six engine.
| Porsche flat-6 engine | |
|---|---|
| Production | 1963–present |
| Layout | |
| Configuration | flat-6 |
| Displacement | 2.0–4.2 L (122–256 cu in) |
It features the largest engine ever fitted to a production 911, a 500-hp 4.0-liter flat-six. The crankshaft is pilfered from the GT3 RSR race car, and the connecting rods are rendered in titanium.
Porsche 997 is the internal designation for the Porsche 911 sports car manufactured and sold by the German automobile manufacturer Porsche between 2004 (as Model Year 2005) and 2013.
The Porsche 996 is the internal designation for the 911 model manufactured by the German automaker Porsche from 1997 until 2006. It was replaced by the 997 in 2004 but the high performance Turbo S, GT2 and GT3 variants remained in production until 2006.
