Secondary Air Injection Manifold

Tiny
WHITESHIRTSAMMY
  • MEMBER
  • 1996 FORD F-150
  • 4.9L
  • 6 CYL
  • 4WD
  • MANUAL
  • 146,500 MILES
I am confused on how the air injection manifold connects to the nut. The nut is treaded and will connect to the cylinder head but the manifold will not tread into the nut. Am doing a rebuild of a 300i l6 4.9l engine. The cylinder head is new and also the Secondary Air Injection Pipe.
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Friday, May 14th, 2021 AT 8:01 AM

3 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
I am not sure I understand which portion you are not getting connected. From what I understand you are trying to connect the distribution tube that you pictured to the manifold? If so, you need the check valve and diverter valves before it gets to the manifold.

Take a look at the picture below.

If this is not what you are looking at, can you get pictures of your engine and we will see what we can figure out?

Thanks
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Saturday, May 15th, 2021 AT 7:05 PM
Tiny
WHITESHIRTSAMMY
  • MEMBER
  • 60 POSTS
I was confused about how the air injection manifold stays inside the nuts after installing the nut on the cylinder head. I installed everything and notice the intake manifold makes contact with the air injection manifold so it will not radle out of the nuts if I hit a speed bump too fast.
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Saturday, May 15th, 2021 AT 8:01 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Oh, okay. I understand. Thanks for posting that info though because if you were confused, then others will be as well and this will answer they questions as well.

Thanks for using 2CarPros. Glad you figured it out. Please let us know if you need other things in the future. Thanks
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Sunday, May 16th, 2021 AT 5:32 PM

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