So I'm going to go ahead and replace the intake manifold gasket this weekend.. I have a few questions for you guys.. I have the 3.1 engine, fyi.

What exactly should I buy?

Do I need to do both the upper/lower gaskets?

Is it necessary to change the bolts, too?

I've read it's a good idea to do the fuel injector o rings, too..

What's the best gasket to get, so I don't run into this problem again anytime soon.

Approximate time this job will take? I'm setting aside all of Saturday in case it takes me longer than I hope it does...

are you doing upper intake or lower intake

Check out this thread: Topic: Hot coolant smell...no visible leaks?