wildbilly32

No engine expert here but I don't believe that is a chunk missing. The engine was running when sent in. I think Jake would have called if he had found an exploded cylinder liner. Regardless the liners get machined out anyway.

Flat6 Innovations

No chunks were missing. That’s a factory windage notch-
This build is coming along well, and as scheduled. We edited more video this past week, and will get it scheduled to be released on the channel.

wildbilly32

Engine out and apart. #5 doesn't look good. #6 is toast! Update video from Flat6 Innovations:

wildbilly32

Some feedback I received: #6 was horribly scored, #5 almost horrible, and #4 just starting. All of that can clearly be seen in the above video. Bore scoring is replacing the IMSB problem but on steroids! I don't wish to sound like an alarmist but if you have one of these cars pay attention to proper recommended maintenance activities/procedures, the engine sounds, tailpipe appearance and oil consumption. The sky is Not falling but information is power so my advice is to soak up as much as possible.

85eurocarrera

[QUOTE=wildbilly32;15959873I don't wish to sound like an alarmist but if you have one of these cars pay attention to proper recommended maintenance activities/procedures, the engine sounds, tailpipe appearance and oil consumption. The sky is Not falling but information is power so my advice is to soak up as much as possible.[/QUOTE]

From what I understand;
Use a good motor oil
Drive off immediately after cold start, keeping rpms at or below 3k until operating temps are reached.
After that, what more can you do?
Thanks for your thread! Very informative! And very jealous of your new motor. 😎

wildbilly32

Above is a good start. Jake and Flat6 Innovations has produced 8 videos including a FAQ video about bore scoring. There is tons of information in those videos that I can't even come close to recounting here. I would encourage watching and re-watching these videos to absorb all of the things that can help/hurt the engine. I have done this and still miss things that I catch next time through the series. As Jake says you can do all the right stuff and still end up with bore scoring. I say why not do what you can to prevent it.

Disclaimer time(again): I do not work for F6I. I do not have a financial interest in F6I. I am paying for my engine work. I choose F6I from what I read over a period of years and from talking to Jake. They are the best...in my opinion. I am happy to share this journey with the goal of helping people understand the issue. I am excitingly waiting for the return of my car!!

10/10ths

I shipped my 2004 Boxster s to Jake and he installed his IMS Solution and a lot of other upgrades for me. I've put 35,000 miles on her since then and it has all been pure joy.

wildbilly32

Per you title...Yes, they do rule! I made my decision based on facts and I am completely comfortable that things will be done correctly at F6I.

Flat6 Innovations

Thanks for the kind words. You were great to work with :-)
One good thing about the 986 Boxster- they simply do not score bores!

Mike Mullins

possible reason for no issues on 2.5, 2.7 3.2 motors?

just curious,

Thanks
Mike

wildbilly32

SURE!!! Now you tell me!!!

Flat6 Innovations

These engines do not use forged pistons, lack ferrostan piston coating, and have more open running clearances. They also have better stroke/ bore ratios, as well as rod/ stroke ratios, and a slew of other benefits.

Dom991.1

So the Boxster motors did not use forged pistons but the 911 did?!? Does it just go by the displacement of the motor? I know you show a number of variables but is the displacement a common denominator? I’ve watched the ‘bore scoring’ series (great stuff), just thought still trying to figure out which motors/years/models were best to AVOID this issue. Thank you for weighing in! -Dom

Flat6 Innovations

The Boxster never shared the displacement of the 911, until 2007 when it became a 3.4 engine, when the Boxster S got the M97.21 Cayman S Engine. The 07 and 08 Boxster are the only Boxster engines that are scored bores.

its not a displacement issue, it’s an engine designation issue. There’s 17 engine designations in the M9X engine family.

Basically any 986 is safe from bore scoring, as well as any 987 base (2.7) or Boxster S 987 from 2005 and 2006, with M96.25 and M96.26 engine designations.

Dom991.1

That’s great detail - thank you for that response!