I HAVE A 4

  • Tiny
  • davidwade
  • 2001 Ford F-150
  • 70,000 miles

I have a 4.2 ltr. Engine that I'm told has a vacuum leak at the bushing of the lower intake manifold (below the fuel intake/outake, by the firewall) I'm told that the entire manifold will have to be purchased to take care of this. Is this fact or fiction?

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Wednesday, January 16th, 2013 AT 1:55 AM

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  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,409 posts

Why does the manifold itself need replaced? What did they tell you? Also, is it plastic?

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Wednesday, January 16th, 2013 AT 2:02 AM
  • Tiny
  • davidwade
  • Member

Top manifold is plastic and the bottom one is aluminum (metalic). Im told that the bushing isnt sold separately and that it's all part of the manifold assembly. Since I asked this qustion I have purchased a Dorman lower manifold for $230 (online) thru PartsGeek. It comes with all seals and gaskets. I hope I made a good move. The bushing in question is in the back right. I think it is from the shaft that turns to open and close the ports on the right side. I saw the smoke test myself and that was the only spot (except for a little at the PCV) where smoke was getting out. Engine seems to be running good but the check engine light still lives after a couple of other things were replaced (sensors).

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Wednesday, January 16th, 2013 AT 2:50 AM
  • Tiny
  • Jacobandnickolas
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If you got the gaskets and all, you did fine. Let me know if you have questions in the future

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Wednesday, January 16th, 2013 AT 2:53 AM
  • Tiny
  • davidwade
  • Member

Thank you.I sure will

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Wednesday, January 16th, 2013 AT 3:08 AM
  • Tiny
  • Jacobandnickolas
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  • 68,409 posts

Good luck

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Wednesday, January 16th, 2013 AT 3:13 AM

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