AT a glance, I need to change upper radiator hose.
I noticed a little coolant dripping down on manifold, so I assume it's time to change the hoses in the valley under the intake manifold

While all that stuff is off, also gonna change value cover gaskets.

What other hoses should I change?

 

Check them, if they look old and worn/soft, bulged up at hose clamps, or cracked, change them.


Also check the coolant cross over pipe assembly that goes to the cylinder heads, these are common for breaking where the upper hose connects, and also crack underneath. Check thermostat housing near top cap, they crack when the cap is over tightened and from old age.


Also check that your coolant is up to par. While changing the cam cover gaskets, check that the part load breather isn't clogged.

 

I would always change the upper and lower radiator hoses, crossover pipe, thermostat housing to aluminum, short connecting hose. But at this age, every hose and the reservoir are questionable.

If you are only driving locally, no need to change everything, as you're only a tow away, but for extended trips the peace of mind may be worth the investment.

I was delaying cooling system changes to my '06 with 50K mi, but a few days before a trip to Fl the thermostat housing began leaking. That would have been expensive at 300+ mi. from home, and it still wasn't cheap due to the complicated design, but a easy DIY.

The new thermostat has the engine running at 179- 183 F, so I'm not done yet. I'll start a thread on that issue soon.

I should add that unless you are using the Realgauge mod by whitexkr or a OBD app you really don't know what you the engine temp. is.

 

One leak that drove me crazy in the front was the temp sensor assy, the mount is just a press fit into the plastic pipe and it leaked under pressure, finally noticed a tear drop on it after a cool down. Dam thing was so loose I could practically pull out by hand, glad I caught it before a "there she Blew"
Jeremy