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JUST hit 60,000 miles in my 05 Aero. One of those things where you look down at the right moment and notice it. KEWL! 60,000 miles!
Then while cruising along on the highway to Columbus OH for the 1/2 marathon, about 5 miles later, I notice my temperature gauge rising....slowly. Hmm....that's NEVER happened before. Is this a false reading or something? Then it climbs even faster and I immediately get off the gas even more. Fortunately there's an exit/gas station right there nearby.
Belts start to squeal...We definitely have a have a problem Houston!
Pop the hood and coolant is everywhere! I'm tryin to look to see and determine it's the top hose from lack of firmness (insert gay joke har-har-har)
Leave car there overnight. Did the 1/2 marathon and came back.
Nursed the car home with driving/coasting on the backroads all the way home.
Take off the intake shrouding to get to the top hose and see a 1" gash on the hose where it's closest to the radiator. I grumble how the engineers were so stupid to have it so close.
Then I noticed MY fail.
On the upper hose is a rubber 'sleeve' if you will. It had moved down and was not even in the area to do it's job of protecting the upper radiator hose closest to the radiator.
So this is reminder to all my friends here to check that the next time you're under the hood!
I thought the sleeve was there to protect the hose from the spinning alternator bushing. It did that for me when I put it on a little too tight.
Your hose might have split from fatigue and pressure.
When the hose would be cool, it wouldn't be close to the radiator, but once hot and expanded slightly, it was was definitely rubbing. A nice 1" gash to show for it.
I had that hose collapse in on itself when my radiator cap went bad, and decided replacement was in order at that point. I suppose, too, that hoses are like tires in that the rubber ages, and if they are 6 or 7 years old, they probably need some attention. Good to hear that you are OK, and it sounds like you got the car shut down soon enough to avoid more serious issues.