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Old 7th August 2020, 17:12   #1
Eddiebassman
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Default Pcv filter material missing

Hi all. So I changed my pcv filter today which was fairly straight forward. However, it must be so long since this was done as all the filter material has vanished leaving just the plastic cage behind.

What problems could be caused by having no pcv filter for a prolonged period of time and is there anything worth checking?

The intercooler hose on my car is certainly porous as it’s caked on oil and has probably been like that for some time. I’ll be replacing this at some point soon (after payday).

I should point out that the posts by artic and greyghost helped me get this done, I would have had no chance without these, so thanks gents.
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Old 7th August 2020, 17:37   #2
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Old 7th August 2020, 19:47   #3
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Quote:
Originally Posted by Eddiebassman View Post
Hi all. So I changed my pcv filter today which was fairly straight forward. However, it must be so long since this was done as all the filter material has vanished leaving just the plastic cage behind.

What problems could be caused by having no pcv filter for a prolonged period of time and is there anything worth checking?

The intercooler hose on my car is certainly porous as it’s caked on oil and has probably been like that for some time. I’ll be replacing this at some point soon (after payday).

I should point out that the posts by artic and greyghost helped me get this done, I would have had no chance without these, so thanks gents.
Are you sure it has not been replaced bt the BMW vortex replacement, Which does not have a filter fitted??
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Old 7th August 2020, 22:36   #4
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Ah damn it, that makes sense. Here’s are some pics, now you said the word vortex, I noticed a coned shape at the bottom.
I guess this is worth keeping for next time since I’ve swapped something good for something mediocre!
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Old 7th August 2020, 22:40   #5
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Ah damn it, that makes sense. Here’s are some pics, now you said the word vortex, I noticed a coned shape at the bottom.
I guess this is worth keeping for next time since I’ve swapped something good for something mediocre!
The Jury is out on these.. Personally I prefer the original filter element, the filter will catch any crud and not let it pass through your engine.
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Old 8th August 2020, 11:35   #6
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The Jury is out on these.. Personally I prefer the original filter element, the filter will catch any crud and not let it pass through your engine.
I totally agree with you Trikey, I'd rather have to change the filter knowing that it catches the muck and it will be disposed of rather than the type that makes the engine ingest it's own waste.
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Old 8th August 2020, 11:46   #7
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Quote:
Originally Posted by Eddiebassman View Post
Ah damn it, that makes sense. Here’s are some pics, now you said the word vortex, I noticed a coned shape at the bottom.
I guess this is worth keeping for next time since I’ve swapped something good for something mediocre!
that looks like the cage that holds the filter material to me, ie someone has removed the filter material to release any blockage and reduce the smoke.

The PCV vortex I had always thought was just that, a spiral design - to create the vortex, which has a valve and spring in its centre.

With reference to vortex, there are many stories on the BM forums of them failing. Cheap ones tend to fail due to plastic fatigue, with the 'better' ones tending to fail due to seizing closed (I assume the spring fails and/or the valve gums closed ).

Another point with the vortex type ones. If you have one fitted, and get a little smoke, even though the intercooler hoses and rings check out fine, confirm the integrity of the vortex housing or seals have not been compromised (this is common on the BM forums also).
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Old 8th August 2020, 14:43   #8
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Yes, that looks like the toilet roll type with the felt bit missing. Nothing in my Vortex one looks like that.
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Old 8th August 2020, 14:48   #9
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Quote:
Originally Posted by clf View Post
that looks like the cage that holds the filter material to me, ie someone has removed the filter material to release any blockage and reduce the smoke.

The PCV vortex I had always thought was just that, a spiral design - to create the vortex, which has a valve and spring in its centre.

With reference to vortex, there are many stories on the BM forums of them failing. Cheap ones tend to fail due to plastic fatigue, with the 'better' ones tending to fail due to seizing closed (I assume the spring fails and/or the valve gums closed ).

Another point with the vortex type ones. If you have one fitted, and get a little smoke, even though the intercooler hoses and rings check out fine, confirm the integrity of the vortex housing or seals have not been compromised (this is common on the BM forums also).

The Vortex type is just a plastic funnel, however BOTH types have the rubber and spring diaphragm at the side of it. I changed both bits of mine as I figured the diaphragm must have been a bit tired after 100K. A lot of people seem to forget about the diaphragm bit.
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Old 8th August 2020, 20:29   #10
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Both types need the rubber and spring diaphragm, it is a depression limiting valve. The gases vent into the intake side of the turbocharger, and when it spools up the crankcase could go below ambient pressure if the valve didn't close.
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