Quote Originally Posted by hunter_alexander View Post
I thought that the sc 3800's didnt have that intake gasket problem. Thought it was only for the NA 38's.
Both engines use the same gasket design.

Quote Originally Posted by hunter_alexander View Post
for the O2 sensor, why only the front one? By that I mean, there are two right? Why would only the front one go bad?
The one in front of the cat has nothing to protect it in case of a overly rich condition or coolant burning in the combustion chamber or any of a number of things. These things can foul a O2 sensor pretty quickly.

The rear O2 sensor is sitting behind the cat (because its job is to monitor the cat's performance) so the cat takes care of a bunch of the nasty before it reaches the sensor.