Change in GT3 crankcase
11-11-2003, 12:42 AM
#1
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Change in GT3 crankcase
The upper photo was taken of a GT3 engine delivered from the first batch of GT3's delivered to the USA. Note that it has a 964 casting number and is actually the same casting used in the last air cooled cars.
The lower photo was taken of a GT3 delivered last week. Note has a different crankcase casting with a 996 casting number and the casting has been modified to eliminate features used in the air cooled cars. It also appears to have ribs not in the earlier crankcase. Both pictures are taken from same side of engine.
The lower photo was taken of a GT3 delivered last week. Note has a different crankcase casting with a 996 casting number and the casting has been modified to eliminate features used in the air cooled cars. It also appears to have ribs not in the earlier crankcase. Both pictures are taken from same side of engine.
11-11-2003, 11:35 AM
#3
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The depressions with the yellow dot and the blue "H-J" are machined to receive oil drain tubes from the cylinder heads on an air cooled car. The one with the blue dot remains in this GT3 case as I believe it would be machined to receive an oil line in a turbocharged engine application now, but is still unused in a GT3.
The little walls projecting perpendicular to the crankcase above the depressions described above mate with air ducts on an air cooled engine. These ducts are retained by a screw threaded into the blank boss directly above the "101" in the casting number. These are now eliminated in the 996 case.
The 3 vertical depressions are new and I wonder if they indicate some internal design changes to stiffen the case as well.
The little walls projecting perpendicular to the crankcase above the depressions described above mate with air ducts on an air cooled engine. These ducts are retained by a screw threaded into the blank boss directly above the "101" in the casting number. These are now eliminated in the 996 case.
The 3 vertical depressions are new and I wonder if they indicate some internal design changes to stiffen the case as well.
11-11-2003, 07:59 PM
#5
Official Wednesday AM Red Bull F1 test driver
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Nice to see others had as much of that damned cosmoline as mine did. I've already spent two hours just on the engine removing that crap! I'm pretty sure mine says 964 but I'll look again. It was delivered in October...
11-11-2003, 09:11 PM
#6
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No major implications. Looks like Porsche just changed crankcase suppliers (or added a new one) and has a new rev of the case design w/o the air-cooled remnants. It's like back in the days of the SC to 3.2 Carrera transition where the tooling for the case with the bolt-on sump plate finally wore out and they went to the new design w/just a drain plug. Not that they didn't strengthen the case when they did that rev and I think the SC RS was the first car to get the new case.
11-11-2003, 09:31 PM
#7
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I think it will just be a curiosity in the future for collectors.
It happened somewhere between serial number 2101 and 2281.
It happened somewhere between serial number 2101 and 2281.
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11-11-2003, 09:57 PM
#8
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Made in Spain!!!!! That does it, I am going to buy a 350Z now, instead of that Latin GT3 car. I know that 350 Z is made in Japan!
Made in Finland (Boxster) is one thing, but made in Spain? I guess I shouldn't be so harsh. The Spanish did make a heck of a motocross bike many years ago, the Bulltaco, of some such spelling. Hey, they used to make sailing ships too, real rugged at that, good for long voyages to the yet unknown New World!
Made in Finland (Boxster) is one thing, but made in Spain? I guess I shouldn't be so harsh. The Spanish did make a heck of a motocross bike many years ago, the Bulltaco, of some such spelling. Hey, they used to make sailing ships too, real rugged at that, good for long voyages to the yet unknown New World!
11-11-2003, 11:57 PM
#10
Racer
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Greetings,
Is this case for all new 996 cars or just the GT-3? Made in Spain sounds like another money saver for the penny pinchers at Porsche. I think it sucks. Less Old School.
Best,
Don
Is this case for all new 996 cars or just the GT-3? Made in Spain sounds like another money saver for the penny pinchers at Porsche. I think it sucks. Less Old School.
Best,
Don
11-12-2003, 12:22 AM
#11
Burning Brakes
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Rennman: The engine case for the GT3 engine is still completely different from the "standard" 996 engine case (I don't think there's any common engine parts actually). It used to be the 996 and Boxster motors were collectively known as the M96 series but I think Porsche muddied the waters by slapping an M96 designation on the GT3 engine. And this is far from the first non-German sourced GT3 part. The rear wing on the Mk 1 GT3s, and the Series 1 996 AeroKit, was made in France. I imagine you'll see more of this as Porsche implements the cost cutting measures they were speaking of earlier this year.
11-12-2003, 02:00 AM
#12
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The first time I noticed the GT3/Turbo/GT2 engine had a 964 crankcase was at the Frankfurt auto show during the Turbo's introduction. The camshaft housings on the Turbo engine on the show stand said:"Made In France". Speedline of Italy has made wheels for Porsche for years. Cromodora of Italy has made the transmission castings for years. The wing on the GT3 I looked at yesterday said:" Made In Switzerland". It's a global car and I don't think the quality necessarily suffers because of it.
11-13-2003, 11:22 PM
#13
Official Wednesday AM Red Bull F1 test driver
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Just checked again and I have a German case in my German car, a 964 part number. My VIN is just before 2281. Car was delivered in mid October. Though I'm sure it makes no difference I like my 964 case better than the Spanish one... especially after the cosmoline is removed !
