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Old 25-10-2017   #1
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Twinair valve actuator oil filter

I wrote this recently regarding the Twinairs valve arrangement.

Quote Originally Posted by Goudrons View Post
Obviously the system is reliant on engine oil, low engine oil and the valves/solenoids can't lift the valves and I seem to think there is/are "oil strainers" fitted to stop debris suspended in the oil entering unit.
The oil strainer part had me wondering, could these be blocking and causing failures?

I've seem the 4 cylinder filter/strainer for sale and I read they are tucked up behind the cam belt.
https://newalfaparts.co.uk/home/506-...-strainer.html

Looks like this could be pulled out, checked and washed out if required.


But what does the Twinair version look like and where is it fitted?

Part number appears to be 71770205.
Number 8 here
https://www.fiatdalys.lt/en/catalog/...-timing-system

Oddly, this doesn't show it fitted and more strangely the image of the actuator seems to me to be upside down to the way it's fitted to the car!

A bit more digging and this does appear to be the right way up and the filter can be seen screwed in to the unit slap bang in the middle of the image.
http://www.ilportaledeiricambi.it/va...5257488_i66229

You can make it out here on an image of a nearly complete engine (cam cover's missing), in between the solenoids black connector and the cam chain/pulley.
http://www.team-bhp.com/forum/attach...0ctwinair4.jpg

Now, is it accessible?
In the pic above of the used actuator, the whole unit appears to be quite oily, so it's inside somewhere?

https://www.ebay.com/itm/2012-FIAT-PANDA-312A2-000-875cc-Petrol-2-Cylinder-Manual-Engine/272534344981?epid=1243483237&hash=item3f74501515:g :LlkAAOSwt5hYiLJO&vxp=mtr
This image seems to show the filter is under the cam cover, but there is an access plug over it.

I feel a task coming this weekend, I might try pulling it out and see if it's gunked up.
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Last edited by Goudrons; 25-10-2017 at 19:18.
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Old 25-10-2017   #2
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Re: Twinair valve actuator oil filter

Nice bit of detective work.
Would be interesting too see if there is any restriction and gunk on a well serviced engine.
One thread to watch eagerly.
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Old 26-10-2017   #3
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Re: Twinair valve actuator oil filter

Replace it, every ~30.000mls, like I ( and many more) do on my 4 cil. MA unit, despite it's NOT mentioned in the service manual..
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Old 27-10-2017   #4
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Re: Twinair valve actuator oil filter

Can't find any images of the TA's actuator's filter, but found this from a 4 cylinder Alfa Multiair.
https://imgur.com/yZdK8PZ
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Old 27-10-2017   #5
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Re: Twinair valve actuator oil filter

Quote Originally Posted by Goudrons View Post
Can't find any images of the TA's actuator's filter, but found this from a 4 cylinder Alfa Multiair.
https://imgur.com/yZdK8PZ
That's the way it looks after many miles...
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Old 27-10-2017   #6
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Re: Twinair valve actuator oil filter

That filter looks grim.
So is the one in the picture from a badly serviced car, wrong oil, short runs and cool running or Fiat having an oil change interval of too many miles and long intervals.
A high tech engine like the TA in my mind should have oil and filter changes every six months or 6000 miles.
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Old 27-10-2017   #7
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Re: Twinair valve actuator oil filter

Quote Originally Posted by murphyv310 View Post
That filter looks grim.
So is the one in the picture from a badly serviced car, wrong oil, short runs and cool running or Fiat having an oil change interval of too many miles and long intervals.
I've not idea, I found the pic linked to a Alfa Forum.
I suspect the car may have had some use, but I'm guessing as they are on a forum they could be an enthusiast and perhaps not abuse service intervals.

http://www.alfaowner.com/Forum/alfa-...ed-filter.html
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Old 27-10-2017   #8
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Re: Twinair valve actuator oil filter

This is what a MultiAir ( TwinAir?) filter looks like after about 50.000 mls. with normal maintainance and quality oil....
So indeed, change oil more often!

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Old 27-10-2017   #9
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Re: Twinair valve actuator oil filter

That's what they look like after 50,000 miles and haven't been cleaned?
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Old 27-10-2017   #10
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Re: Twinair valve actuator oil filter

That's why you should change it, despite it's not mentioned in the service manual...!!
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Old 27-10-2017   #11
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Re: Twinair valve actuator oil filter

Hi
The Rover KV6 had a similar issue with the breather filters and port fitted into each cylinder head. Mine was clear as was many others. Those like myself that did more frequent oil and filter changes didn't have the problem. To be fair though oils have improved since the engine appeared in the Rover 800 many years ago. It does beg the question even after alleged improved oils why is this type of carbon build up still happening? Is it fuel quality, short runs or what?
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Old 27-10-2017   #12
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Re: Twinair valve actuator oil filter

Oil change intervals are way too long, and it is very important to use the correct specs. oil, for the MultiAir unit and the TwinAir unit as well.
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Old 28-10-2017   #13
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Re: Twinair valve actuator oil filter

Well I had my filter out for a check.
It wasn't anywhere near as bad as the one above, but then again my engine only has 18K on it and oil is changed every 7500 miles.

It's not that hard to get at, it's obvious by where and how it's fitted it is meant to be accessed.

Tools.
10mm socket and a small extension bar.
Some way of removing the cap in the cam cover, I used the extension bar of a 1/4 in socket set. (cam cover and filter cap are different on mine then the images I originally posted in the Ebay link)
15mm socket (fairly thin walled)
Magnet
Clic R pliers.



Remove the engine cover/airbox by flicking open the Clic R clip on the pipe to the turbo and undoing the three 10mm bolts (two on the cover and one on the air intake pipe to slam panel)



The cam cover and filter cap are different on mine to the ones I have seen on other images.
It appears to be some sort of hard plastic, along with the filter cap rather than the alloy one I've seen images of.



My cap has a large slot cut into it and has a couple of arrow markers stamped it to it that align with marks on the cover.




A 1/4 socket extension just fits into the slot and the cap opens by turning the cap 1/3 turn anti clockwise, it's not a screw fit, just a couple of tabs underneath holding it on, like a oil filler cap fitting.





Now the filter's head is exposed.




15mm thin walled socket is needed to fit in the hole and loosen it, it's not tight, just nipped up.
The body of the filter is alloy, but the centre (pressure relief valve?) is steel so a magnet will just about grab it to lift it out.



Dirty?
Not too bad, though there was quite a bit of gunk stuck up inside.




Cleaned, I used some carb cleaner, first squirted from out to inside to flush the gunk out the bottom.




Refitting is just working backward.
Screw the filter back in and refit the cap so the two arrows line up.

Make sure when you refit the engine cover/air box that you push the turbo pipe back in fully.
There is a small notch in the pipe that lines up with a bump in the stub on the aibox.

Clic R pliers are needed to fit the clip back in place.
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Last edited by Goudrons; 28-10-2017 at 13:23.
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Old 28-10-2017   #14
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Re: Twinair valve actuator oil filter

Don't forget to uise some sealant on the tread, just in case.
A new filter has factory applied sealant on it...
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Old 28-10-2017   #15
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Re: Twinair valve actuator oil filter

The Twinair filter is a completely different part and appears to work in a different way to the 4 cylinder one.

Unlike the 4 cylinder filter, there's no evidence of sealant or thread lock on the Twinair version.

Again, unlike the 4 cylinder version, the Twinair one isn't exposed to the outside of the engine.

The Twinair one is actually fitted within the engine, inside the cam cover and by the looks of the valves centre, it's appears to be designed to bypass oil back into the engine/crankcase, it looks like there's some sort of pressure relief valve within it's core.

Applying sealant or thread lock might actually contribute to blocking the filter up in this case.
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Last edited by Goudrons; 28-10-2017 at 14:09.
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