Ok, so I am looking at having my valve cover gasket and also the cam tensioner gasket replaced. I know there is a half moon seal that needs to be replaced by the cam tensioner but the guy who is going to do it for me says there is a full circle on as well? I have not heard anything about this.

Also one of my pre-cat o2 sensors died. Will that cause my cat to die as well? I don't think it will if I replace it right away but yeah... just wondering.

Josh

 

no it wont cause any damage to the cat but take your rear o2 sensor and put it in the front and put the bad one in the rear for now....from what im told the rears do nothing but hey idk man make sure someone else approves of this first

 

In my experience the rear O2 is completely different from the front... I wouldn't recommend the swapping route without confirming part numbers and such. I sort of doubt that your front sensor is bad unless you are noticing a difference from normal running conditions. You would generally that feel the affects, the way the car is driving, like burning to much gas, or whatever... I would get it fixed sooner rather than later, before it gums up a CAT an cost you 1000's...

Shawn