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Discussion Starter #1
Hi,

Another thread, but this time on how to change your oil breather. If your like me and get worried about how your engines running, then this is a must.

Before we start i need to say:

*****I have performed the maintainace myself and i am comfortable with my ability to do so and i can not be held responsible if you damage your vehicle in an event to follow my guide.*****

OK lets start:

I bought the complete repolacment kit for around £40 from my local dealership:



but you can buy the up-rated Vortex breather for £20.25 inc vat which would save you money and use the old cover, your choice totally.

To start, you will need to take the pollen filter out first, which is located infront of the windscreen:



There are three clips, one on each side and one on the front, turn them and they should pop up and they have springs supporting them. Lift the panel up:



You will need to take the panel out, so be careful and pull from one side and it will come out. Once out, take the old filter out:



where the filter was, you will see 4 T30 (Torx30) screws holding another panel in place:



Unscrew the screws, they should stay within the panel once they have been unscrewed. Dont pull the panel out yet as you will need to un-clip the pipes running across the front of the panel. Put you finger under the cilp and put abit of leverage and pull away from the panel slightly and it should uncilp:





Once you have done that, you can now take the panel out. Lift the panel first and pull from one side:




You no need to take the engine cover off. There are 5 bolts holding the cover on. 2 at the front, 2 at the back and one on the right side near the coolant cap.:




Push the rubber gromet off and you will now be able to take the cover off. On the left side of the engine you will see the inlet pipe and the air filter cover. The inlet pipe is held on by one bolt and the air filter cover is held by 4 bolts:



In the picture, you can see i have undone the pipe bolt and you can see first 3 air filter cover bolts. Unscrew them all and get ready to unscrew to last one which is around the rear of the cover:




Once you have got it unscrewed, you will be able to lift the cover off and slide it under the pipes running across the engine:



Next to the air filter you will see the breather cover:



The cover is held down by by 3 5mm hex-head bolts, unscrew them:



And slowly and carefully take the cover off, if you have the old style breather it will look like this:



And next the the new on:



On the engine, you need to replace 2 seals, they will have little tabs on them which you can see and use to take them out:





New seals on the left, old on the right:



Before i put the new seals in, i gave the holder a wipe down to get rid of any excess oil:



In with the new seals:



And slowly and carefully put the new breather and cover on:




Screw the 3 bolts back in and reverse the guide to get the engine back to normal.

Like all my threads, i hope this comes to some use and i hope you can benefit from my guide.
 

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Another good one Lloyd - You must spend ages on these guides.. Top man :thumbsup:thumbsup

I did this a couple of months ago... Not too difficult, even for a sausage-fingered numpty like me ;)

One point though - I only swapped the vortex bit that goes in place of the toilet roll.. I didn't get the whole top unit with the orange membrane visible through the hole... Anyone know if it's critical to replace that bit too ?? Cheers all..
 

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whats the purpose of changing the oil breather please ? I have mayo in my 318 E46 petrol engine. A mechanic told me that it may be the oil breather thats causing this. Anyone heard of this before ?

many thanks
 

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Discussion Starter #12
Im not a mechanic but if i found that, i might get a preasure check done on the engine to see if the head is possible on the way out but i would first do an oil & filter change with motor flush, get a new oil breather and see how you get on before you go and see a garage.

Dont know if im thinking thats the right thing but can anyone correct me or help?
 

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great post L16YD L, this helped me a lot this weekend in replacing mine.

i bought the "new shape" breather from bmw and used the existing cover - the sales person told me once this one is in it does not need replacing again, unlike the sponge one? anyone know if this is true?
 

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Does the 330D have the same sort of oil breather and in roughtly the same place? :confused

I am going to de-swirl-flap my 330D and thought it might be worth doing the oil breather as well while it is in bits... :thumbsup

Also as I have a 2003 model, will it have the vortex model or foam sort? :shifty:

Thanks
Dave
 

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Discussion Starter #18
Does the 330D have the same sort of oil breather and in roughtly the same place? :confused

I am going to de-swirl-flap my 330D and thought it might be worth doing the oil breather as well while it is in bits... :thumbsup

Also as I have a 2003 model, will it have the vortex model or foam sort? :shifty:

Thanks
Dave
It should be in the same place, unless its been changed before, it will most likely have the foam filter.
 

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Cheers Lloyd, using your guide i just replaced my 'loo roll' for the new vortex in my lunch break. keep them coming.
 

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Replacing Air Filter on 320D M Tec

Many thanks for your useful guide and instructions. I successfully changed my oil and oil filter just recently (7,500 mls) but found little or nothing with exhaustive searches for changing the Air Filter on my 320D until I came upon your posting.

BMW certainly don’t make it easy in comparison to previous cars I have owned which took just minutes. It is a major pain to have to go to this trouble to change an Air Filter but thanks to you it makes it a whole lot easier.

By the way, I popped my car into a local garage last year for, Oil change, Oil Filter and Air Filter, also (7,500 mls). I supplied all the parts along with 2 x 4 Litre tubs of 5W / 30 Castrol Edge. I told the guy 5.5 litres exactly and that I would be collected the remaining 2.5 litres on return.

That worked out fine.

They asked for €85 euro which I agreed to and to pop back in 2 hours to collect.
When I returned, I was happy that the work had almost been completed but I did however note to the mechanic that the old ‘’allegedly removed’’ Air Filter looked quite fresh in the box apart from a few greasy oil marks and he just nodded and mumbled yes.

It was just today after I made an inspection that in fact the Air Filter was never actually replaced on that occasion as the outer lint cover was a dark grey. The one which was allegedly removed last year and which I still have in the box was never fitted.

Evidently he must have figured it was too difficult and I was fobbed off with a lie.

When I removed the engine cover last week I noticed that one of the 4 Hex bolts which holds down the Air Filter housing was missing. When I got under my car last week to remove the sump plug the missing hex bolt fell out when I dropped down the sump panel cover.

The moral of the story is that you just don’t know what these monkeys are doing with your pride and joy and if one can do this work ones self it really is worth the effort.

Thank you for your most excellent post. I will be replacing my Air Filter myself this coming Saturday.
 
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