Originally Posted by RamTech
If money is no object, sure, replace all the timing components for peace of mind. Chrysler has inspection guidelines for these parts and if they fall within those specs, there's no reason to replace them. Just remember, new parts can fail as quickly as old ones.
I wouldn't go tearing the heads off the engine until I verified with either a leakdown or chemical test that combustion gasses are entering the cooling system. If there is a problem and you have to pull the heads, there's no need to replace the water pump unless it's leaking or the bearings are bad.
I agree, no point in replacing stuff thats not necessary. You can buy a "block tester" at most parts stores, I think I paid 50 bucks for mine. Its a great way to check for combustion gases in the cooling system, although it wont tell you where they are coming from (head gasket, cracked block, cracked head etc.)
In my opinion, if you replace the timing tensioner i would replace the chain since they usually come as a set.