no it is not possible
No. They intake and heads need removed.
no.
According to Chilton's, on a V6 you can, but with the V8 you have to take off the intake manifold and get inside...
how can transmission fluid git in the intake
Check the fuel pressure regulator.
On a 5.3. at the top rear of the engine, behind the intake manifold. I is very difficult to get to without first removing the intake manifold.
the firing order will be located on the intake usually the aluminum part of the engine on the top you may need a lite to seeit
If the engine is the 24 valve "Duratec", then the majority of owners report that removing the upper intake manifold makes the job a whole lots easier. The 12 valve "Vulcan" provides enough room to be able to access the rear bank, cylinder numbers 1-3, without removing the manifold. See "Related Questions" below for more
If you do'nt know that you should'nt work on it!
take it to a mechanic
Intake valves are in the cylinder heads.
It is underneath the intake manifold, on the inside of the passenger side cylinder head. It cannot be removed without removing the intake. Note that, despite the instructions, you do not need to remove the upper intake from the lower. Don't waste the upper intake gasket. Remove it as an assembly. I also took out the fuel rail...I couldn't get the EGR tube out, and that is an alternative way to get to the far back, right intake bolt (facing the engine compartment from the front). Also, be VERY gentle with the plastic connectors as you remove them. I broke almost half my fuel injector connectors...nightmare. Good luck.