Pressurized oil pan?
#1
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Pressurized oil pan?
Today I was tinkering under the hood and had the motor running. I actually did the water injection cleaning, which really smoothed out how the it was running afterwards, but after i let the car run for about 5 mins to do this procedure, I shut down the car, and took off the oil cap. I could hear a hissing sound like taking the cap off a soda bottle. What would cause this?
Some background info, I have converted to non-sequential and only have one line running to the filler neck. The one with the PCV valve in it. I checked to make sure it wasnt backwards and its not. Any ideas guys?
Some background info, I have converted to non-sequential and only have one line running to the filler neck. The one with the PCV valve in it. I checked to make sure it wasnt backwards and its not. Any ideas guys?
#3
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Depending on how soon after shutdown you removed the cap and heard that sound, it could be from one of the combustion chambers on the compression stroke that has'nt fired, bleeding down.
#5
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Originally Posted by SidewaysR1
I have converted to non-sequential and only have one line running to the filler neck. The one with the PCV valve in it. I checked to make sure it wasnt backwards and its not. Any ideas guys?
If you use a PCV between the oil filler and manifold the PCV closes when under boost. That means whenever the engine is under boost you are not venting the sump which can lead to such things as blown out dipsticks, oil leaks or blown gaskets.
The '93 system has both lines in place. Perhaps the PCV valve was federally mandated at the time or something? I don't know. The only line you need is the one from the oil filler to the primary intake; no need for a PCV valve in this line.
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