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Registered
Join Date: Jan 2009
Location: Marietta, Ga (Atlanta)
Posts: 2,970
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The restrictor allows you to check the oil level dipstick with a running motor without the engine dying. Don't know which models need it, but
a car with a MAF flapper unit sure does (Carrera and 964)
But something strange, I replaced the MAF flapper with an actual modern Mass Airflow unit, and it no longer needs the restrictor when checking oil while running. Go figure.
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'80SC Widebody 3.6 transplant Anthracite "The Rocket"
Long gone but still miss them all:
'77 911 Targa, '72 BMW 3.0CS Coupe(finest car I ever had!)
'71 911T Coupe White, '70 911T Coupe Blue
'68 911 Coupe Orange, '68 911L Soft Window Targa
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