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Registered
Join Date: Sep 2007
Location: seattle
Posts: 106
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can 911sc be driven w/o oil hose resistor installed??
i posted a question last week regarding my friend missing the oil hose restrictor in his 911sc and the car not idling when removing the oil cap.
he ordered the resistor from dc automotive and will arrive this week and was told that it is not good to drive the car in its current state because the back pressure can blow up the oil tank? is this possible? his plans are to install the resistor this week but he has been driving the car and poerhaos he shouldn't? thx
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1980 911sc - Silver/black, Ltd Slip Diff. w/original Sport Seats w/Blue Plaid Inserts |
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Chief Head Scratcher
Join Date: Apr 2009
Location: Bainbridge Island, WA
Posts: 444
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The restrictor helps prevent the oil tank from burping liquid into the air box. As long as the hose is still attached, it is creating LESS pressure in the tank. I didn't think that the SC had a restrictor anyway. I know that my car went 189k miles with no restrictor..
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John Morris '79 911SC |
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We used to, once in a great while, get a car into my shop that had a missing restrictor. None of those oil tanks "blew up," and some had been driven many thousands of miles since the crank breather hose was replaced by others. Actually, as long as the oil cap is on, nothing else changes. I just don't know where some of these stories start!
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Keep the Shiny Side UP! Pete Z. |
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Join Date: Sep 2007
Location: seattle
Posts: 106
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Quote:
just wanted to make sure my friend wouldn't damage his engine if he continued driving it before he installs the restrictor. thx for the info!
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1980 911sc - Silver/black, Ltd Slip Diff. w/original Sport Seats w/Blue Plaid Inserts |
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Chief Head Scratcher
Join Date: Apr 2009
Location: Bainbridge Island, WA
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Ah, according to the PET it is used in '81 and newer. Would explain why I didn't have one in my '79. The restrictor for the pre-81 is built into the elbow that attaches the oil line to the air intake boot.
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John Morris '79 911SC |
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Senior Member
Join Date: Nov 2000
Location: Great NorthWest
Posts: 3,948
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My '78 also features ONLY the flame arrest item at the backside of the rubber plenum from plate to throttle body. But then again, I am not the PO and so still am not sure if the early SCs features BOTH the flame arrester AND the restrictor.
It appears from this thread that I do not need both? That would put my mind at rest.
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'78 Targa in Minerva Blue |
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Registered
Join Date: Sep 2007
Location: seattle
Posts: 106
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all i know is my friends car would stop running when the oil cap was removed - if i used a clamp on the oil hose leading from the oil tank to the intake, the car would idle fine so it was obvious it was missing the restrictor.
not sure how the pre-81's are setup
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1980 911sc - Silver/black, Ltd Slip Diff. w/original Sport Seats w/Blue Plaid Inserts |
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Chief Head Scratcher
Join Date: Apr 2009
Location: Bainbridge Island, WA
Posts: 444
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Quote:
I think that it is safe to say that you need ONE of them in place and that the cone is the newer style.
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John Morris '79 911SC |
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