ps filter, does it have an o-ring?

[bfd]

Hello everyone,

My first post here, my car is a 1992 300d 2.5 turbo.

I did a ps fluid flush yesterday, but i was in a real hurry. The flushing process went fine, but when I dropped the new filter in, it made a metallic clank noise. At the time I did not think too much of it. I discarded the old filter without giving it much visual inspection.

Now, today I am having an uneasy feeling about that clank noise. Should the ps filter have an o-ring at it's base? I went back and pulled the new filter out -it has a recess in the base that looks like it could fit an o-ring.

There was no o-ring sitting beneath the new filter and i fear that I may have thrown the old o-ring out with the old filter.

Can anyone tell me whether the filter should be fitted with an o-ring or not.

Thanks.

[Hit Man X]

Not on any of the filters I've used. Just at the top.

[bfd]

Ok thanks Hit Man,

I was puzzled as to how the filter made the seal at the bottom in order to seperate the clean side of the paper element from the dirty side. But I guess the design is such that the seal is not required to be so perfect -there is afterall a slight gap between the top circumference of the filter and the sides of the resevoir. I suppose the pressure of the spring does a good enough job of sealing the bottom of the filter.

bfd.