First time engine rebuild here,when I go to do my fuel injectors and take apart my intake manifold and such are there any gaskets and seals n stuff I need to replace on the manifold and stuff when I take it apart? I only have the fuel injectors and I’m gonna be getting my spark plugs here soon once I get them I was gonna spend a weekend working on my jeep but if I have to wait longer for gaskets n shit it’s ok I just wanna know before I tear into it if they are even there

 

I just finished replacing my fuel injectors on my '09 with 3.8L, 187K miles. There are 6 O-ring type rubber gaskets on the upper intake manifold. It's usually recommended to change them if you're having to take the upper intake manifold off. They're pretty inexpensive and simple to change. Do you have to change them? I would say no. I had to replace my Lower Intake manifold gasket at about 125K miles, and I replaced the uppers at the same time. They looked fine. When I replaced the fuel injectors this time around, I didn't bother replacing them and they looked fine. They often fall off when you take the upper off, they just sit in there.

The Mopar P/N for Upper intake manifold gaskets on 3.8L (4781580AA). It's item #8 in picture