[Mk2] [Generic] Differences Between N/A and Turbo Oil Filters

[paul port]

[gtech]

Of recent months I have been to two different Toyota dealers for filters and on each ocassion been supplied with the shorter filter, this is for the turbo, the parts guys insist that toyota now use one part number for both the NA and Turbo.

[simmo490]

the filter is now the same for both turbo and NA`s

even all parts companys have the same stock number now

simmo

[JeffD]

Ben, here is a much nicer diagram than mine. Dirty oil up through the outer holes, clean oil out through the middle. If it was the other round it would mean:

1) It would be impossible for the by-pass valve to work as it would be going against the direction of flow,

2) The are of filtration would be a lot smaller rendering the winged part of the element a waste of time,

3) If filter became blocked it would become completely blocked - eh-oh!

http://aa.bosch.de/aa/en/static/produkt ... nktion.htm

[JeffD]

First of all, turbo and N/A oil filters are NOT the same. Here is a photo of the back of N/A filter box bought from Toyota:



Norice that the fitment says "S - Series (exc. 3S-GTE)" ie. excluding 3S-GTE - NOT a turbo.

Further, they are different sizes as shown here :



If you have been supplied the shorter filter for a turbo you have been given the wrong one :-(

The parts guy at Toyota I deal with is pretty sharp about knowing his stuff and I've bought from 2 different sources to makle sure. There is more than one part number for each type of filter - see here for cross reference:

http://www.flashmetal.com/index.asp?fun ... T&catid=40

To me that highlights the value of sourcing from Toyota as opposed to motor couldnt care less factors LOL!

Anyway, back to Paul's question: First of all thanks for improved diagram LOL! As mentioned (and also in your diagram) dirty oil travels up the outside of the filter and passes through the filter element into the central chamber so the only selant needed is to seal the inner chamber from the outer. At the bottom this is done with a rubber seal (half of which shown in original photos). At the top that see-through glue bit seals the central chamber to the by-pass valve. Thats all the sealing you need. Oil doesnt bypass the filter by going down the center of a wing as per the diagram because in reality theres no hole as per your diagram as the fold is very tight. Also the glue seal covers the inner chamber end. If yout still unsure PM me your address and I'll post a piece :-)

[paul port]

Seriously... there must be a cap there to seal that hole...
Some filter manufacturers use glued on card, some have a glued on metal cap.
The rubber bit is purely the anti-drain valve.

If you are telling me that there is no seal on that filter - EG you could poke a pen down the gap I indicated...

Then you have yourself a faulty filter - and be very glad you did not install it on your car!!!

Paul

[JeffD]

Right, I think I know what your getting at now - your thinking that oil could flow down the hole in the fold and in effect bypass the filter element (show by the red lines here):



So I got a knife and tried and inserted it into the 'hole' to try and split the fold apart - no such luck - they are glued - trying to seperate the fold only breaks the wing apart so oil cant do what your worried about :-)

Hers a pic which doesnt show this very well LOL!



Looks like filter manufacturing has moved on! :-) Definitely not faulty.

[JeffD]

Here is a better pic of the glue at the top of the pleat which stops this hole:

[PFrazier]

What filter should I be using on my 1990 MKII T?

[JeffD]

If you PM me your chassis/engine number I will double check for you but it should be the longer of the 2 filters ie. the turbo one.