The only way to get to the intake manifold gasket is to take the head off. I'm working on it right now and so far that is all i can say
Your intake manifold gasket needs to be replaced.
Get a very good mechanic and dont plan on getting your car back the same day. Or buy a new gasket and remove the intake and diy.
Extremely difficult as this is a major repair. Best left to a professional.
you need to make sure your plugs and wires are ok, if it is still rough 9 out of 10 chances it is your intake manifold gasket.
you go to a Machanic.
I've done several at my shop--these are not easy at all--the 5.5 hours alldata says it pays to replace the intake mani gasket is crazy--it takes all of 10 hours--most likely easier just to pull the cylinder head
no, use rtv sealant
Remove the manifold and change the gasket. And voila!!!
The removal of a head gasket from a 2005 Nissan Altima is a time consuming process and should be done by qualified and experienced mechanics. It will involve removing the valve covers, heads, and other accessories. In addition to a set of head gaskets, gaskets for the intake manifold and valve covers will be needed. A coolant flush and refill will also be required to complete this job.
If it was removed then YES.
any manifold? well it is basicly to seal 2 mateing surfaces preventing liquid and or air from leaking from there respective channels within the manifold
About an 8 hour job.