Cartridge oil filter whats the deal?

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Orkney
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Cartridge oil filter whats the deal?

Post by Orkney »

just replaced and it was fine, until pouring the caught waste oil for recycling and lo and behold theres this bloody great spring !
Ok off with the filter casing - assume the spring is to push the bottom plate up? also assume thats where the bottom gasket should live between the plate & the filter?
Incidently in the haynes i have it only shows the felty type filter as mentioned ina previous thread.
Anyway upshot is thanks to the spring ive given up on it for today so which goes where? need to know as need to fix it as need scabby for the post run in the morning.
Shame is it sounded sweed and appreciative for the oil change until discovering the spring.
oh forgot to mention - removed cannister - fitted spring- refitted, started engine - half a gall of oil all over the floor :evil: :evil: :evil: obviously never got it lined up on the seal or soemething but well cheesed off !
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jonathon
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Post by jonathon »

Some of the canister filters only come with one seal, which is too thin to seal against the housing. The filters used to come with a choice of seals. :o :(

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alex_holden
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Post by alex_holden »

The spring goes in first, then ISTR there being a washer, then the bottom pressure plate, then the filter cartridge. It won't filter the oil without the spring because that's what pushes the cartridge up against the top plate. What gasket? The trickiest part of the job I find is to get the new O ring into the groove on the top casting as it's obscured by the top pressure plate.
Last edited by alex_holden on Sun Dec 09, 2007 6:12 pm, edited 1 time in total.
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Orkney
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Post by Orkney »

This one had 2 Jonno, top one was thicker, old one was a beast to get out without scoring the rims, older and more perished than teh missus it was !
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bmcecosse
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Post by bmcecosse »

I asume it's the rubber sealing ring - and yes there are always 2 provided because the same filter is used on many cars - eg TR7 and Stag. You should use the thin one - and stick it in with grease.
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jonathon
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Post by jonathon »

Actually, not all filters come with two seals. We have returned several because of this, so check with your supplier or visually check if collecting.

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Orkney
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Post by Orkney »

yes O ring / sealing ring was what i meant not gasket :-(
the thicker (wider) one seemed the better fit compared to what came out and teh gap. Will gie it a proper look at in teh morning in the light of a new day :-)
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chickenjohn
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Post by chickenjohn »

This kind of uncharacteristic struggle with Minor oil filters is what led me to change to the Mini spin on housing. Its the only mod on my cars! (But still have the original canister gubbins).
Cheers John - all comments IMHO
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IaininTenbury
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Post by IaininTenbury »

You can often find that the old sealing ring is still good for another tour of duty. This can save a lot of faffing, and is normally what I do on my own cars. You then end up with a few spares for when you buy a filter with the wrong ring...
Not exactly text book stuff, but think I first read that tip in Minor Matters Tech Tips some years back and it does make it a lot easier. Obviously check to see if it is sealing before you charge off down the motorway, but in my experience this always works.
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Orkney
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Post by Orkney »

Yes good tip - would have not changed the top ring bt for the fact it was of unknown history. This is only a running flush out for a week or two then will be chanching it and the oil again for some better oil.

What i cant figure out and next time it gets changed will take some photos is the actual rasembly order.
Older service mavual says (but does not show) about cannister reassembly..
Bolt through - spring - metal plate, sealing ring, filter cartridge.

2 problems with this - firstly the bottom ring to which it refers - the second one i have doesnt fit - the metal plate is several mm's smaller than the inside diam of the outer casing (not to imprtant as this filter has rubber top & bottom so is self sealing)
Other one is .. the metal plate - nowhere does it state ehich way up this is supposed to be i.e. middle recess up or down?
I'm guessing its up because if its down thats another 10mm your trying to force pressure on the spring before you can get the canister back on and the bolt started.
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alex_holden
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Post by alex_holden »

You put the bolt through with the washer and o ring under it, then you put the spring in, the other washer, the pressure plate with the dished part down, then the filter element. I'm not sure what the sealing ring you refer to is or why it matters that the pressure plate has a smaller outer diameter than the inside of the canister. If you put the pressure plate in the other way round the spring wouldn't be able to push as hard on the element and it wouldn't seal as well. Yes, you do have to push against the spring to get the bolt started (cue oil running up your sleeve because you've dutifully pre-filled the filter with fresh oil).
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Orkney
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Post by Orkney »

Think ive twigged what the old manual was on about now - was obviously reffering to the o ring on the outside - ie the seal between the bolt head and cannister.
Maybe i have the slightly wrong (oversize) filter cause it was a terrible job to get the cannister on. And by that i mean required an extreme amount of force to push teh cannister up to get the bolt started.
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alex_holden
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Post by alex_holden »

I have a Crosland 440 filter element here from ESM. It's 87.4mm long including the two paper washers glued to the ends, 71mm OD, and 33.7mm ID. It comes with three different sizes of sealing ring.
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Orkney
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Post by Orkney »

I'll compare the old & currently fitted when i replace the 'flushout' one next week against that measurement.
I'm half tempted to have a go with the felt ones but not until i know whats what exactly :-)
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alex_holden
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Post by alex_holden »

Do you want me to post you this one?
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Orkney
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Post by Orkney »

That would be brilliant Alex cheers, just let me know what i owe you. least I know i have a correct one as a starting point :-)
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Axolotl
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Post by Axolotl »

The concave washer goes with the dome upwards. It acts to centre the filter cartridge.

This picture, from the owners handbook, shows the correct assembly of spring, washer etc.,

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Cheers, Axolotl.

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Orkney
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Post by Orkney »

Dead handy Axy cheers - anychance youve got a bigger version of that pic?
Not surprisingly what i removed had the washers on the outside of the cannister !!!!
Its exactly the info i was trying to find.
Will PM you my email if you do have a bigger pic.
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Axolotl
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Post by Axolotl »

PM and e-mail sent.
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Orkney
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Post by Orkney »

Cheers for that - clarifies things greatly - and yeat another thing been incompetently done on scabby, still its a great learning experience !
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