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
Your intake manifold gasket needs to be replaced.
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
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.
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.