Finally, some good news thanks to an honest garage.

My troublesome 996.2 had a tapping noise from bank 2 was starting to smoke a little bit. I took it to my local Porsche specialist who boroscoped it, saw a couple of dark lines and came to the conclusion that my engine had Bore Score and required a £13K rebuild. After looking at all the options (whilst saving for a re-build), I decided to send the car to Sid at Porsche Torque as he has done all the work on my car in the past and I trust him to do the full re-build with 6 new liners etc. He's also a lot cheeper than the original garage. Turned out it was just the oil air separator and a noisy tapped. "I knew the problem the minuet I started it up and heard it - definitely not bore score)" this is when years of experience count. Most garages would have taken my cash and done the job I asked them to do, but Sid is honest, and has saved me literally thousands. I've been driving it all day and it's running perfect. Top Man, Top garage. Cars lining up ready to be worked on. Whilst I was there he showed me an M91 engine with BoreScore so I could see the difference. M91 Bore Score.

That is good news. I get the impression there is a sense of cashing in on owners fears without further investigation. Even IMS is considered 'mandatory' to have changed by some garages.

That's great news. Glad it's gone in your favour

Why do they suffer from piston score can someone enlighten me.?

It is generally thought that the water jacket between liner and crankcase is too small, which can cause local boiling, and reduced cooling. This is most likely during warm up, when the thermostat is closed. Hence why people fit lower temperature stats so the water starts circulating earlier. It usually occurs on cylinders 5 or 6, as they are last in the coolant flow. It happens less, if at all, on the 3.4, where the water jacket is larger. The best way to help prevent scoring is a careful warm up, keeping the revs and load down, but that it just good practice anyway.

Oil starvation leading to excessive friction on the bore, piston & rings. In certain conditions, one bank is usually more susceptible to less lubrication - poor maintenance, hard acceleration from cold and not allowing the engine to cool down after a hard drive can exacerbate the issue.

Why do people choose to give theor engines a good thrash when they are not fully warmed up. I always warm up my engines in whatever car I drive even if it's not mine. My BMW did 250k had it from new always warmed it up before hard revs the only reason it didnt do more miles was down to the ABS pump and body work let it down for the MOT. It makes you wonder if some of these engine issues are down to engines being treated badly. Phil

Hi Guys leading on from that thread, another option is also to change the oil to something like Millers Nanodrive. When talking to indie they told me that when doing an oil change with, for example Mobil 1, it was like water when they released it. I'm led to believe the nanodrive gives the engine more of a coating. Although I'm no expert. Steve 2006 Cayman S

How often do you see performance cars being driven hard out of business parks; RS6's, Subaru's, M3's etc? I put it down to clueless when understanding engineering. Agree, most damage is done in early years. One reason why Porsche led turbo technology is their ability to innovate. The 944 turbo has its own coolant pump that cools down the turbo after the engine is turned off, a neat feature and this is 1980s - dramatically extends the life of the turbo. Although I still always gave the engine to recover from a drive. I know 'oilman' is worth contacting with regard to oil technology - some perfectionists will change oil every 6 months regardless of mileage.

I use millers race formulae 5-40 in mine. Cost twice as much as mobile1.