Line Boring Classic 911 Engines - PR Technology Technical Torque

PR Technology mechanical engineer Richard den Brinker walks us through line boring classic magnesium 911 crankcases in this detailed video. Richard specialises in Porsche race car preparation, fabrication, and engineering, including CAD design, TIG welding, and component machining. Most recently, the PR Technology-prepared RP968 World Time Attack Challenge Pro Class car has won the title for three consecutive years.

[@ovalwingnut]

I consider it a privilege to see that OEM line boring tool in the wild. Very COoL. Thank you and cheers from So.Ca.USA 3rd House On the Left.

[@normcameron2316]

Is that a left handed reamer or where you accidentally spinning it counter clockwise? I just love the different ways manufacturers, re-manufacturers and mechanics deal with bores. Caterpillar had a tool group for boring 3208 and similar blocks using a bar and lathe bit and power feed device. Before my time, Cummins had huge one piece reamers for correcting bores. Still got the manual somewhere.

[@sixpotshot]

Fantastic and so interesting video, thanks! More technical videos please 😊

[@Uswesi1527]

Very interesting, highly professional.

[@shanerorko8076]

I've done the same process for king pins. Im sure theres a hone material out there that can cope with mag, probably diamond with a certain type of fluid, but then you pretty much have to set the hone up just for mag which would be expensive.

[@john2ndname]

Do all Porsche machine shops have this available and what the cost of this if someone's case needs a bore?...cheers

[@errolrojas3460]

What year or years had the classic magnesium crank case?

[@Sasskin]

Do you get a good surface finish doing it by hand?

[@mercedesvan-doors34]

I'm surprised at just a single support at each end.

[@356type]

What version of the 911 workshop manual is that? I have not been able to find it on the carrera 3.2…..

[@colinbatchford8007]

Great video I've wanted to know about line boring though I'm into bikes the principle is the same.

[@sivertdrekslerdefer1255]

I hawe the tool in shorter for the beetle. Took me manny days to understand what it was😅

[@cmiimages]

Nice tool and well explained, but that's not really a power driven single cutter line boring machine. It is an accurate manual align reaming operation, while it achieves a similar result, its pure align reaming, not line or tunnel boring in the true sense.

[@Selmerpilot]

Yeahhhhhh true, but that’s just not how these are done. There’s maybe half a dozen places on the planet that can do these Mag Porsche cases correctly. Scary but true

[@stevelee5724]

True. But I've never seen this. And I wonder if he has come backs because it's not computer controlled accurate. Old school styles ay ! Cheers from New Zealand

[@shanerorko8076]

Thats BS there's thousands of shops that can do this job. Magnesium isn't as hard as metals like titanium​ yet there's plenty of shops that machine titanium every day. @Selmerpilot

[@Selmerpilot]

@@shanerorko8076 absolutely positively not with Porsche magnesium nor aluminum cases for that matter. Too many specialized tools required. Been working on these things for 20+ years, there's maybe 3 shops in the US with the best of them by far being Ollie's engineering. World famous.

[@shanerorko8076]

@Selmerpilot so you're trying to tell me that someone like Titans of CNC that build titanium and magnesium parts for the aerospace industry couldn't make a few holes round? Get a grip.

[@macthemec]

Mountain out of a mole hill, this isn’t out of the norm for any old engine block of that era

[@danielclark7495]

The doom music needs to go! :)

[@neilgillespie7435]

Loss the dumb noise

[@stevelee5724]

Wow ! Thats fvcken cool, man ! Hand ground. Is that guy Aussie or Kiwi ? I pick Aussie...