My intake manifold cracked the other day so I have taken it off and am looking to replace anything that would be "wise" to replace while I have it torn down.

Right now I'm replacing the manifold with the Dorman 615-188 Upper Intake Manifold which comes with all of the gaskets and a new thermostat.

I also bought new spark plugs and was considering a new serpentine belt.

Is there anything else I should consider?
Is there any reason for me to replace the Curved Boot Ignition Coil at this time?

Some of the springs separated from the boot when I took them off. Is that considered damaged?

I have a 2000 F150 Lariat with the 5.4.

 

You don't necessarily have to change the coils, but I'd definitely replace the boots and springs.

http://www.rockauto.com/en/parts/sta...ug)+boot,10150

 

I would changed the cylinder head temp sensor while the intake manifold is off and any plumbing that may run under there too.

 

don't forget the upstream oxygen sensors...

 

Ended up just replacing the spark plugs and coil packs.