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Old 12-18-2012, 02:49 AM   #42
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Join Date: Jun 2011
Location: Brisbane, Australia
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My Ride: 2007 MX-5
Originally Posted by DeclanM3 View Post
It was at speeds between 60-80 when it occurred. I could be wrong but don't think a fan failure would make that much of a difference at those speeds?
It all depends on what the coolant temp reached. A large variety of conditions can cause the coolant temp to rise and the fan should come on at a certain temperature to get the air flow up - it's the only option the system has left at that stage.

If the fan doesn't come on due to a faulty sensor, faulty fan motor or dodgy electrical connection or something, then the overheat condition will continue until one or more of the other variables is changed for the better.

I never rule out anything...but I have never (in many decades) seen intermittent mechanical water pump failure.

Last edited by Brissyjohn; 12-18-2012 at 02:50 AM.
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