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Need help, Hissing Noise coming from Engine when vehicle is off

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Old 05-16-2011, 12:23 PM
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Need help, Hissing Noise coming from Engine when vehicle is off

Drove one block to check on a neighbor’s dogs and heard a hissing noise when I arrived. Drove the 1994 3.0 4Runner home and the hissing noise was still going. It is coming from the passenger side, power steering area, but can’t pinpoint it anymore. It has been going on now for about 20 minutes. Any ideas????
Old 05-16-2011, 12:58 PM
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Nail in the tire? I know that's a dumb question but that's about the only thing other than noise from the rad if the engine overheats that I can think of that would make a hissing noise.

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Old 05-16-2011, 01:08 PM
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[GVIDEO][/GVIDEO]
Originally Posted by Junkers88
Nail in the tire? I know that's a dumb question but that's about the only thing other than noise from the rad if the engine overheats that I can think of that would make a hissing noise.
I thought that at first because that is exactly what it sounds like, but I checked the tire over and the noise is defiantly not coming from a tire.

I don't know if it may be something with the vacuum or a/c that make act different since I only drove it about a 1/4 mile.
Old 05-16-2011, 04:51 PM
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Starting to think it was a freon leak. Will find out tomorrow.
Old 05-17-2011, 05:22 PM
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Found the problem...

Old 05-18-2011, 04:59 PM
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What was it?
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