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Registered
Join Date: Dec 2007
Location: lexington, kentucky
Posts: 537
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Cis experts help identify part
 have been taking the CIS apart to replace the couplers to the runners I'm not sure what these two items in the picture are and what they connect to. The things I'm referring to are the brownish orange plastic thing that looks like it should have a tube into it and the other is the black tube hanging down from to air box?? THE PICTURE IS UPSIDE DOWN JUST TO COMPLICATE ISSUES new computer not having too much luck Any ideas? car is a 74 but i have looked at another 74 system from a normal car and it is different mine is a carrera that had a few more horsepower than the regular one and they look different?? Last edited by mspirito; 09-08-2011 at 04:41 PM.. |
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09-08-2011, 04:34 PM
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Chief Head Scratcher
Join Date: Apr 2009
Location: Bainbridge Island, WA
Posts: 444
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What year is the CIS?
"brownish orange plastic thing" is your Cold Start Valve Flange Here is a pic of the back of my '79 CIS (before I cleaned it up). Hope it helps! 
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John Morris '79 911SC |
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09-08-2011, 04:42 PM
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Location: Nash County, NC.
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On the early cars that is just a plugged hole if you removed the piece and looked inside. Later injection used it for air flow when cold.
Bruce |
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09-08-2011, 04:48 PM
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Quote:
I'm not sure what you are referring to with the tube - but there is a drain on the bottom of the air box that goes to a fitting on the front right side of the engine by the fire wall.
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Rex 1975 911s and 2012 Range Rover Sport HSE 1995 BMW R1100RS, 1948 Harley FL |
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09-08-2011, 04:48 PM
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Location: lexington, kentucky
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The tube I'm referring to is the big black one in the center of the picture coming from the bottom of the cis box thanks
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09-08-2011, 04:51 PM
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the brown plastic pipe is the cold start valve adapter housing the vacant tube should not be open it was used on later 911 models that have a aux air regulater valve on passenger side of engine between cyl. 5 and 6 your car does not have that valve. the hose coming down from the center of the cis box is a oil drain or vent hose that should connect to a metal vent trap on the other side of the sheet metal (transmisson side) and at the end of this metal tube assy. it has a rubber drain end.
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09-08-2011, 06:19 PM
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1975 Porsche 911s
