Vacuum leak

[jhenyre]

I have a 2003 exp 5.4, 4x4. I just replaced my pcv valve and hose, but the plastic (feels like plastic?) part that the hose plugs into on the rear of the engine behind the throttle body feels loose, and smoke test shows a vacuum leak here. I can't see it to tell what the part even looks like that connects the hose to the engine, but can you tell me what part it is so I can look it up? PITA to fix? Thanks

 

[Hamfisted]

I would just get the whole tree assembly. The age of the assembly makes everything brittle and potential leak spots.

Motorcraft OEM Vacuum Tree for 2003 5.4L


Dorman 46831 Vacuum Tree Assembly on Amazon

Ford 5.4 2V Vacuum Tree Assembly on Amazon





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[jhenyre]

I replaced that, but its not the hose that's the problem, it's whatever the hose attaches to at the back of the engine. I'm not sure if it's a threaded part or a plug

 

[Hamfisted]

That's the intake manifold. You'll probably end up pulling it off and epoxying the tube, unless you want to replace the intake manifold.