I,d like to clarify my query. Can I disconnect the engine compartment tubing from the fire wall or does the tubing pass through the firewall? from the interior I can see what looks like a block that may be a junction block or a manifold? I was hoping that tubing pushes on to this block
I have replaced the vacuum tubing in the engine compartment . There is a manifold on the fire wall and the tubing that passes through the firewall pushes onto this manifold. so pull off the old and push on the new. Same inside under the dash.