Whining noise in engine on low revs. PCV? - Page 2

LT South Africa · Jul 19th, 2016, 12:22

There is high vacume in the crank. I have to use two hands to remove the oil cap with the engine running. If I pull the dip stick I hear a distinct Pop of the vacume. When I place my thumb over the dip stick inlet it sucks with considerable force. So it seems there is more vacume than pressure. If this makes any sense.

canis · Jul 19th, 2016, 13:38

This guy ...

https://youtu.be/VmHM-jVsmOs?t=2m51s

... says his excessive vacuum was caused by a broken diaphragm in the PCV box. Does yours have one of these? Mine doesn't have anything of that sort.

Note: This guy is one of those annoying people who makes his videos without a clue what he's going to say, and spends most of his time saying "er" and "um" and long pauses while he gathers his thoughts. I apologise in advance. He's tedious to watch, but it's the only one I could find.

LT South Africa · Jul 19th, 2016, 14:06

Thanx Canis. Appreciate the help. I heard about this diaphragm. I had a look for this but could not quite identify it. I did find that on the top of the pcv there is a rounded section of plastic which seems to be separated from the main pcv. I wondered if this diaphragm was not possibly inside there. But it's a sealed unit and I did not want to damage the pcv by opening this.

Jul 19th, 2016, 12:22	#11
LT South Africa Leonard SA Last Online: Sep 16th, 2016 05:24 Join Date: Jun 2016 Location: Lanseria	There is high vacume in the crank. I have to use two hands to remove the oil cap with the engine running. If I pull the dip stick I hear a distinct Pop of the vacume. When I place my thumb over the dip stick inlet it sucks with considerable force. So it seems there is more vacume than pressure. If this makes any sense.

Jul 19th, 2016, 13:38	#12
canis Non Fragile Last Online: Oct 13th, 2023 05:46 Join Date: Apr 2010 Location: Chadderton, Oldham	This guy ... https://youtu.be/VmHM-jVsmOs?t=2m51s ... says his excessive vacuum was caused by a broken diaphragm in the PCV box. Does yours have one of these? Mine doesn't have anything of that sort. Note: This guy is one of those annoying people who makes his videos without a clue what he's going to say, and spends most of his time saying "er" and "um" and long pauses while he gathers his thoughts. I apologise in advance. He's tedious to watch, but it's the only one I could find.

Jul 19th, 2016, 14:06	#13
LT South Africa Leonard SA Last Online: Sep 16th, 2016 05:24 Join Date: Jun 2016 Location: Lanseria	Thanx Canis. Appreciate the help. I heard about this diaphragm. I had a look for this but could not quite identify it. I did find that on the top of the pcv there is a rounded section of plastic which seems to be separated from the main pcv. I wondered if this diaphragm was not possibly inside there. But it's a sealed unit and I did not want to damage the pcv by opening this.

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