rx7turbo

I have read several posts about that on flat 6 Porsches on here.

Not having any problems with either car but my curiosity is aroused.

What causes it?

Other than religiously doing your services, what else can you do to avoid it?

Is there a driving style that tends to lead to this more?

Mine get driven once a week these days as I have a company car but when I do take them out, I do romp on them on this one stretch of road I know of, just to "blow them out".

I also drive them around a little to first warm everything up and then to cool it down after the "romp".

I just want to reduce the chance of this ever happening.

Thanks in advance.

terbiumactivated

Not saying this causes "scoring" yet I'm frequently amazed at how many youtubers and even car show hosts will rev a freshly started motor to redline as soon as it starts...Just why?

danschy

I don't claim any particular expertise other than what I've picked up by reading forums, but I believe the scoring is typically attributable to inadequate lubrication. Two common scenarios are reving the car too aggressively before the oil is up to operating temperature and long high-G left turns (on the track with racing tires) which pull oil away from the scavenge pump resulting in low oil level in the sump and loss of pressure.

Noah Fect

If your old man didn't go full R. Lee Ermey on you when you did it as a teenager, you probably don't know any better.

terbiumactivated

My dad went "there" on a company representative who did it on a brand new car at his dealership, the engine wasn't even broken in all it had was like 30 POE miles to the ship.

various cheeses

I'm curious about this as well. I saw some talk about this on the planet-9 forums too. Are any 9A1 engines affected more than others?

jmh981

Ah, where internet rumours are born.....

Noah Fect

Let's just say that if you ask the barber, he will say you need a haircut.

fast1

Actually almost all demos suffer from this abuse. Many years ago one of my sons worked at a Porsche dealership and he told me that virtually every guy who test drove a Porsche, took it to redline immediately after exiting the dealer's lot.

rx7turbo

Do you have some ACTUAL info to share or do you just want to act like you know something everyone else doesn't?

extanker

ironic he is more factual than your romper room blow it out preventive maintenance plan

Marine Blue

I haven't read anything about cylinder scoring but I have read about bore scoring on the 987.1 cars. It's not a common issue and from what I have read the theory is that cars that weren't properly warmed up or have been used year round in very cold environments could see the issue.

extanker

good lord.......the bores get scored but the cylinders do not .....i will share this one

jmh981

I wasn't responding to any post of yours but - all it takes for something to get blown out of proportion is for someone to ask the question then someone else chiming in like, ''yeah, I heard the same thing.''

And then it's an actual thing and it goes round and round.

All indications are the 9A-1 is very reliable and robust...except in a GT-3 ;]

okie981

Go here: http://www.hartech.org

Click on the blue "Engine Guide" icon. Be prepared to read a long but very informative article about cylinder scoring on Porsche engines. There is plenty of other interesting info on the Hartech website.

I'm not aware of any scoring issues on the 9A1 engines used for several years in 911 and Boxsters/Caymans.