hose coming out of the rear of intake manifold?

[haidantbird]

recently had my engine and trans taken out for a new clutch, themechanic that took it out has quit and now i have a new guy putting everything back in. there is a hose coming out of the back of the intake manifold that i cant figure out what it is for, I am thinking it is something to due with the heater,(which is broken anyways and i wont be using) any one have any ideas what this hose is for?

thanks

 

[paul2748]

If it's small diameter hose it's a vacuum hose for the wipers or the heater. If a large diameter hose, for the power brakes.

 

[haidantbird]

I think its roughly 3/4 inch hose, it is plastic. Would the power brakes be coming out of the back of the Intake Manfold?

 

[Yadkin]

Hose is measured inside diameter, and you are probably measuring the outside. And I've never seen a hose made of plastic. Should be fabric reinforced rubber for a pressure line, plain rubber for small vacuum lines.

3/4" is a big hose, and Ford used 5/8" for the heater. The PCV system is probably a 1/2" hose, so someone might have retrofitted that. The power brake vacuum booster line might be as large as 3/8".