05-16-2015, 08:19 AM
Join Date: Mar 2006
Location: Schwarzenberg, Germany
Total Cats: 75
Is my water pump going out?
I have a problem with my 1996 VVT swapped and Rotrex equipped MX-5.
The car is running fine when there is no load on the engine. As soon as I get some load on the engine the car starts to get hot.
I can drive around with light load and get water temps of 93-94°C (199-201°F), as soon as I get on the throttle a bit more or if there is a hill I drive up or something like this the car starts to get hot up to 98°C (208°F) (this is where I usually get of the throttle to keep the car from overheating)
If I go back to cruising again, temps get back to normal values very fast...
I did 2 times a 450km drive with the car on the German Autobahn driving 160km/h (100mph) for an extended period - where I could keep the temps in check with just going into cruise mode when the temps were rising...
First thought was the thermostat, but this seems to be fine. Could my water pump be going out?
Thanks for your help and suggestions.