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What is this?

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Old 03-12-2007, 06:31 AM
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What is this?

I bought my 4Runner and tore the motor down to rebuild it and this was stuck in one of the water passages. Can someone please tell me what it is? Thanks, Travis
Attached Thumbnails What is this?-dscf8798-2.jpg   What is this?-dscf8799-2.jpg   What is this?-dscf8800-2.jpg  
Old 03-12-2007, 06:58 AM
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Looks to me like it's some sort of protective cap for something.

Previous owner may have had the cooling system apart, and another lowly sole, dropped it in the return hose opening.

It circulated around the cooling system until it lodged where you found it.
Old 03-12-2007, 07:09 AM
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knock sensor/oil pressure boot? On my first gen runner it is soft rubber.
Old 03-12-2007, 07:16 AM
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the little filter on the end of the vsv on the valve cover?
Old 03-12-2007, 08:16 AM
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Whatever it is, it doesn't belong in a water passage!
Old 03-12-2007, 06:18 PM
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Originally Posted by 90SR5-4runner
I bought my 4Runner and tore the motor down to rebuild it and this was stuck in one of the water passages. Can someone please tell me what it is? Thanks, Travis
Easy one, its a "gas filter" (not gasoline either) and its located on a VSV which bolts to the valve cover. Usually, there is 2 or maybe 3 VSV's When I say "gas" I mean gaseous" as in air filter. (remember science class, ie liquids, solids and gasses)
Old 03-12-2007, 08:02 PM
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Thanks!!! I thought that was what it was but was having a hard time figuring out how it ended up where it did and there were still three on the valva cover. I gues someone made a mistake and tried to cover it up!! Thanks again. Travis



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