Porsche Mega factory on TV
in [Car Maintenance]
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From: John on 17 Mar 2010 18:15 Just watched the programme on building the Porsche 911. I couldn't understand how they can put the engine together. It showed 3 cylinders going into one block - the big ends being fitted to the crankshaft and then the other cylinder block being fitted. Not sure how the con rods of the second cylinder could be fitted to the crankshaft once the two cylinder blocks are fitted as I didn't see a removable sump plate.
From: Mrcheerful on 17 Mar 2010 18:46 John wrote: > Just watched the programme on building the Porsche 911. > > I couldn't understand how they can put the engine together. > > It showed 3 cylinders going into one block - the big ends being > fitted to the crankshaft and then the other cylinder block being > fitted. > Not sure how the con rods of the second cylinder could be fitted to > the crankshaft once the two cylinder blocks are fitted as I didn't > see a removable sump plate. on the air cooled 911 the crank is built with the rods on and the case halves assembled round it, then the pistons and barrells go on
From: John on 17 Mar 2010 19:45 "Mrcheerful" <nbkm57(a)hotmail.co.uk> wrote in message news:KYcon.51123$Ym4.15917(a)text.news.virginmedia.com... > John wrote: >> Just watched the programme on building the Porsche 911. >> >> I couldn't understand how they can put the engine together. >> >> It showed 3 cylinders going into one block - the big ends being >> fitted to the crankshaft and then the other cylinder block being >> fitted. >> Not sure how the con rods of the second cylinder could be fitted to >> the crankshaft once the two cylinder blocks are fitted as I didn't >> see a removable sump plate. > > on the air cooled 911 the crank is built with the rods on and the case > halves assembled round it, then the pistons and barrells go on > But how would you fit the pistons to the con rods - or do they enter from the bottom - rather than the head end of the block?
From: Adrian on 18 Mar 2010 03:34 "John" <Who90nospam(a)ntlworld.com> gurgled happily, sounding much like they were saying: >> on the air cooled 911 the crank is built with the rods on and the case >> halves assembled round it, then the pistons and barrells go on > But how would you fit the pistons to the con rods - or do they enter > from the bottom - rather than the head end of the block? The conrods are dangling out of the crankcase, then you simply press the gudgeon pins in. The barrels are separate to the crankcase, so fit on individually - either before the piston's fitted to the conrod or after. Just depends on accessibility to the gudgeon and/or ring compressor. Same as a Beetle, same as a 2cv. On a 2cv, the crank & big-ends are all shrunk- assembled, rather than bolted.
From: Mrcheerful on 18 Mar 2010 05:20
John wrote: > "Mrcheerful" <nbkm57(a)hotmail.co.uk> wrote in message > news:KYcon.51123$Ym4.15917(a)text.news.virginmedia.com... >> John wrote: >>> Just watched the programme on building the Porsche 911. >>> >>> I couldn't understand how they can put the engine together. >>> >>> It showed 3 cylinders going into one block - the big ends being >>> fitted to the crankshaft and then the other cylinder block being >>> fitted. >>> Not sure how the con rods of the second cylinder could be fitted to >>> the crankshaft once the two cylinder blocks are fitted as I didn't >>> see a removable sump plate. >> >> on the air cooled 911 the crank is built with the rods on and the >> case halves assembled round it, then the pistons and barrells go on >> > > But how would you fit the pistons to the con rods - or do they enter > from the bottom - rather than the head end of the block? pistons go in to the bottom of the cylinder like a motorcycle engine. or you can put them in from the top, push them almost all the way through and put the gudgeon pin in and then finish lowering the barrell. |