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Join Date: Jul 2019
Posts: 4
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911 piston orientation
I’m disassembling my 1974 911 2.7 for a rebuild, and documenting as I go. I believe the #1 piston was installed upside down when it was rebuilt many years ago. All the pistons have the hump pointing towards the fly wheel except #1. Please take a look at the picture and let me know if my suspicion is correct. I want to make sure I get it right when I reassemble the engine. Sorry the pic is upside down.
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10-19-2019, 12:49 PM
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Join Date: Dec 2014
Posts: 13,822
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Yes all should be the same. You should pick up Wayne's book on rebuilding and modifying 911 engines.
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10-19-2019, 01:47 PM
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Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,467
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You’re right on #1 cylinder. the concave area is by the spark plug when you build 2.7 to 3.2
Bruce |
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10-19-2019, 03:34 PM
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Join Date: Jul 2019
Posts: 4
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Thanks for confirming.
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10-19-2019, 04:42 PM
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How about the other side?
Do you a picture of cylinders 4-5-6? When your are looking or facing at these cylinders, the hump should be on the left side of the CIS pistons.
Tony |
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10-19-2019, 06:15 PM
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Join Date: Jul 2019
Posts: 4
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4 5 6 side
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10-19-2019, 07:31 PM
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