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Registered
Join Date: Apr 2005
Location: Seattle
Posts: 12
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2.7 block material
I understand that there are some 2.7 911 engines that were not the dreaded magnesium ones that had so many problems.
Can anyone give me a couple of quick ways to tell what the block is made of? |
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04-14-2005, 10:22 AM
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Join Date: Dec 1999
Location: TX USA
Posts: 9,804
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All 2.7 engines had '7R' Mg cases. Some 2.8 RSR engines were retrofitted with aluminum cases from a factory 'update' kit via the racing dept ...
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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04-14-2005, 10:30 AM
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Air Medal or two
Join Date: Jul 2003
Location: cross roads
Posts: 14,079
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well.....this sounds stupid......but aluminum looks like aluminum,,and magnisum looks like "it",, mabe hold a pc of aluminum next to it?? To the half way exp. eye one can recognize aluminum ez.
If it is a 2.7 chances are termendous thats its a "mag" case...and there is nothing wrong with them if the updates have been done.
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D troop 3/5 Air Cav,( Bastard CAV) and 162 Assult Helicopter Co- (Vultures) South of Saigon, U Minh Forest, Delta, and all parts in between |
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04-14-2005, 10:43 AM
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Join Date: Dec 2000
Location: The Hague, Netherlands
Posts: 806
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There was a short run of 2.7 RS engines with a aluminium (silumin) crankcase. From chassisnr 9113601490 an aluminium crankcase was fitted for homologation purposes.
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Peter '13 981S '73 911T '05 996 4S cab, now gone '70 911S Targa, now gone |
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04-14-2005, 12:22 PM
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Super Moderator
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Aluminum will look "silverish". Magnesium is more of a darker grey...
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Chris ---------------------------------------------- 1996 993 RS Replica 2023 KTM 890 Adventure R 1971 Norton 750 Commando Alcon Brake Kits |
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04-14-2005, 01:52 PM
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Join Date: Dec 2000
Location: The Hague, Netherlands
Posts: 806
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Also, the alu case that was used on the 2.7 had cooling ribs on the bottom.
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Peter '13 981S '73 911T '05 996 4S cab, now gone '70 911S Targa, now gone |
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04-15-2005, 01:59 AM
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1970 Porsche 911 S 
