Oil leak near filter

Oil filter adapter. It uses a set of o rings and the best location to get them is the dealer. Getting it off the block requires a torx bit and wrench. You can see the bolt if you look into the cavity left by removing the oil filter.

Should be NAPA MPE OP6695SB or ECH OP6695 Although it is called an oil pressure gauge switch.

If you have an auto tranny and cooler lines in the radiator, make sure you keep an eye on the lower connection. It tends to leak if you don't tighten it down enough. (nearly pumped all my tranny fluid out one day before I found out)

This is called a filter boss. (Some also term it the adapter.) It is O-ringed to the block and held together with torx bolts. Over time, OEM seals harden and leak. This is a well known problem. Newer blocks incorporate the boss casting which eliminates the need for O-rings altogether.

If you source a new O-ring from the dealer, you'll get the same nitrile rubber part, which will buy you another year or two before it hardens and leaks again. Nitrile rubber takes a set too easily and doesn't do well with temps above 200 degrees for long.

If you want to replace this part only once, go with a very high-temp (>400 deg.) mil-spec ring. I suggest 70 Durometer Viton rubber. Stay far away from neoprene and urethane O-rings - they can't take the heat.

There are a few good online sources;

I like

- they have just about anything you could ever want in O-ring selection. While you're there, check out their material chart:

You might check around town to see if someone local can order Viton O-rings for you instead.