Help gasket residue in oil filter

[rbizet]

Hello,

I am trying to get some feedback as to what the rubber residue in my oil filter could come from. It is definitely not metallic, it is pliable, has a rubbery feel to it and the color is olive green. It looks like a gasket material.

It started to appear during last oil change 6k ago. My car is a 2000S with about 55k miles and always maintained perfectly.

I thought it might be the AOS but I replaced it and the diaphragm which has the same olive colour was intact.

I was told that when the previous owner had the valve cover resealed maybe they used a green compound but I checked the engine and the gasket material is black.

I am running out of idea where is this coming from?

Please anybody can help?

Thanks in advance

[pk2]

weird, some plasic internal part that is deteriating? dipstick tubeee...rubber "O" ring...dunni

PK

[txhokie4life]

possibly the timing chain guides for the tensioner?

Pix of damaged guides

[wvicary]

Spark plug tube O-rings?

[rbizet]

Thanks for the suggestions, I sent my oil filter to Jake Raby let see what he comes up with.

I don't believe the o-rings would end up in the sump.

The chain tensioner a possibility, but I have never seen the material up close is it olive green and very pliable like a rubber gasket?

Thank You.

[RFM]

Perhaps someone replaced the sump cover in the past, and used too much green silicon sealant, instead of the OEM colorless type.