"Jim" wrote in message
...
It sounds like the cooling system arteries are starting to clog up. At 16
years you should be on your 3rd set of risers and 2nd set of manifolds.
The wear plates and gaskets should be replaced whenever you replace the
water pump impeller. Hoses and belts should be carefully inspected. Make
sure you are not sucking air on the pump inlet side due to loose hose
clamps etc.Did you use a 143 deg. thermostat?

To each his own I guess. Can't deny I've reused a few gaskets in my life.
I inspect my impeller for a few years and if it's still good I reassemble.
Most kits come with the works though and I'll put in what ever I get in the
kit if I'm replacing the impeller. I'd forgotten about the belt, that's a
good point. Sometimes they only slip while underway and not as much at
idle.