Thermo fans?

[Big Rob]

The spring in the bottom radiator hose can often collapse or be missing too. That causes the hose to close up due to the suction from the water pump and block water flow.
It usually becomes noticeable at high speeds though, so it's probably not your issue. Check it anyway though....

[Innuendo]

The spring in the bottom radiator hose can often collapse or be missing too. That causes the hose to close up due to the suction from the water pump and block water flow.
It usually becomes noticeable at high speeds though, so it's probably not your issue. Check it anyway though....

That is a good point but it is not only limited to the lower radiator hose. The top hose has been known to suck flat and stop water flow. In fact my top hose in Innuendo is doing that after a turn the engine off. I've been monitoring my temp gauge but haven't noticed anything bad as yet. Check if you can compress the hoses via thumb and forefinger, it should have a decent amount of resistance and a spring to prevent it from sucking flat.