Intake Vacuum Plumbing?
Thread Starter
Instructor
Joined: Dec 2003
Posts: 177
Likes: 0
From: Sylacauga Alabama
Intake Vacuum Plumbing?
I am rebuilding my motor and going through old picture of my intake. I have the build sheet book and the Assembly Manual but I can't find any diagrams on the following hoses. Please see attached pic. If y'all have any better pics of a stock 1979 L-48 vacuum plumbing that would be greatly appreciated.
Le Mans Master
Joined: Mar 2004
Posts: 7,493
Likes: 1,501
From: Little Rock AR
I think your heat riser hose stripe code is white so that isn't it. Kinda sorta related though. The white hose attaches to a metal pipe that feeds the heat riser valve down by the bottom of the exhaust manifold on the passenger side.
The yellow stripe is for the EFE actuator that is on the snorkle of the stock air cleaner. It pulls vacuum to actuate the air intake flapper during cold warm up. Feed the vacuum to the temp sensor in the air cleaner base then out to the actuator flapper. Flapper pulls air from over the outside surface of the ehaust manifold to improve cold start or cold weather drivabillity.
-Mark.
The yellow stripe is for the EFE actuator that is on the snorkle of the stock air cleaner. It pulls vacuum to actuate the air intake flapper during cold warm up. Feed the vacuum to the temp sensor in the air cleaner base then out to the actuator flapper. Flapper pulls air from over the outside surface of the ehaust manifold to improve cold start or cold weather drivabillity.
-Mark.
