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#1 (permalink) Old 02-17-2013, 06:41 PM
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Question Weird sound from engine?

I was noticing that the oil light was taking a little more time to shutdown then usual. It needs oil. When I went to the dip stick and pulled it. A weird sound came out. Like if you were opening a soda. A fizz sound. OK, when I went to pour the oil. I opened the oil cap. It was a little hard to open but again, the fizz sound came from inside the engine. Any opinion? Is this right or something is wrong?
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#2 (permalink) Old 02-17-2013, 07:09 PM
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Does the PVC vent the motor? If not whatever vents motor is clogged it sounds like.
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#3 (permalink) Old 02-17-2013, 07:35 PM
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Originally Posted by hd72m View Post
Does the PVC vent the motor? If not whatever vents motor is clogged it sounds like.

Is this good, or bad. If bad, how to fix it?
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#4 (permalink) Old 02-18-2013, 03:30 AM
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mensajero is this you?
You have posted and helped more people than anyone on this site so that is why I am puzzled by your question.
I am not sure if it is the PVC or what but maybe someone else can chime in,no it does not seem like a big deal for you.
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#5 (permalink) Old 02-18-2013, 07:06 AM
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Like doctors. It's always healthy to have a second opinion. Maybe its something I might not know.
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#6 (permalink) Old 02-18-2013, 09:41 PM
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Like doctors. It's always healthy to have a second opinion. Maybe its something I might not know.
I don't believe that there is any part on your RAV that you haven't installed, disassembled, reassembled, upgraded, and/or reinstalled at some time or another. I think that this situation would be a "no brainer" for you . . .

Jim
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Jesus is Lord
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#7 (permalink) Old 02-19-2013, 03:28 AM
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1st thing I thought was someone swiped his name or something...
Was hoping someone would post what our motor uses to vent extra pressure.
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#8 (permalink) Old 02-19-2013, 01:58 PM
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i would check you pcv valve . in theory you could have excess pressure building up.
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#9 (permalink) Old 02-20-2013, 05:20 PM
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Garage
This is the ventilation valve assembly: ToyoDIY.com

There's two ventilation hoses. One goes from the right side of the rocker cover to the open side of the throttle body. The other goes from the back of the rocker cover to the vacuum side of the throttle body by way of the PCV valve.

It won't be the valve that's clogged. It's only open under vacuum anywayz and isn't mean to equalise crankcase pressure. It'll be the other one that is more likely the problem. Part number is 12261-74020. That being said, it could actually be both. There's lots of oil vapour in there when the car is running and over time it can clog things up.

Basically what's happening is your engine is generating vacuum, as it should, which opens the PCV valve and sucks blow-by back in from the crankcase. This is probably working fine or you would have bigger problems (bad idle, lean surge, etc). When you turn the car off, the manifold pressure becomes higher than the crankcase pressure so the valve shuts. The second hose (without the valve) is there to equalise the pressure. If it's clogged, that will never happen and you will have a bit of negative pressure in the crankcase. So, when you opened the crankcase you increased the air pressure and what you heard was the air rushing back in.

So, just take off both hoses, check and clean. Also check and clean the manifold inlets to make sure everything is open and happy. Should be a simple fix. Take you 5 minutes.
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#10 (permalink) Old 02-23-2013, 03:43 PM
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