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84-85 Trucks & 4Runners 2nd gen pickups and 1st gen 4Runners with solid front axles

Anyone know what this is?

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Old 11-15-2014, 01:19 PM
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Anyone know what this is?
Hello,
While I was replacing my vacuum lines on my 85 I think i knocked the cap off this thing. Not sure what it is but I would like to know what it does. Any help is appreciated.

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Thanks in advance!

Christian
Last edited by Yont283; 11-15-2014 at 01:20 PM.
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Old 11-15-2014, 02:36 PM
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Year, model, engine would help.
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Old 11-15-2014, 02:47 PM
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Looks like the BVSV (bi-metal vacuum switching valve) I think it's a part of the EGR vacuum system.

Here's the related diagram
Last edited by B-Fake; 11-15-2014 at 02:49 PM.
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Old 11-15-2014, 06:40 PM
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thanks b-fake! that looks like it

it's a 1985 4runner with a 22re
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