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What is name of this piece on exhaust manifold?

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Old Jul 30, 2017 | 12:30 PM
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What is name of this piece on exhaust manifold?

The black piece that threads onto the shiny piece. Mine broke off at threads.
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Old Jul 30, 2017 | 12:34 PM
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Re: What is name of this piece on exhaust manifold?

Check valve

A "pneumatic diode ", if you will.

It allows fresh air to go into the exhaust, but prevents exhaust from backing up into the AIR pump.
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Old Jul 30, 2017 | 12:37 PM
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Re: What is name of this piece on exhaust manifold?

Hmm, with engine running, I can hear and feel exhaust popping out of it. Also, can't seem to locate on sites like Advance and Autozone.
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Old Jul 30, 2017 | 12:41 PM
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Re: What is name of this piece on exhaust manifold?

https://www.rockauto.com/en/catalog/...eck+valve,4912
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Old Jul 30, 2017 | 01:02 PM
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Re: What is name of this piece on exhaust manifold?

Thanks Tuned, that is perfect! And after further review, I am going to need the piece that it threads onto. That is what has threads broke off, but the valve has the broken threads in it, impossible to remove.
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Old Jul 30, 2017 | 01:09 PM
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Re: What is name of this piece on exhaust manifold?

I looked up 1990 you might want to double check they should be the same.
https://www.rockauto.com/en/catalog/...tion+pipe,4904
Use a line wrench and pb blaster to help remove the air tubes from the manifold.
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Old Jul 30, 2017 | 01:11 PM
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Re: What is name of this piece on exhaust manifold?

Yea, I just found that too. Thanks for your help!!
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