1999 Mazda Millenia Millenia S overheating

1999 MAZDA MILLENIA
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GENEFRASE
  • MEMBER
  • 1 POST
Engine Cooling problem
1999 Mazda Millenia 4 cyl 231000 miles
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I read where someone else had an overheating problem but they've replaced everything and had a compression test done. I have the supercharged model. I have replaced the water pump and thermostat. It's not keeping any water and builds pressure in the coolant quickly to blow out the water. I've pressurized the coolant system with the spark plugs out up to 30psi and nothing came out. I even used a tube inside the sparkplug holes to listen for leaks. It doesn't run hot immediately or all the time. Could it be the supercharger pressurizing the coolant?
Jun 16, 2008 at 10:55 AM
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KHLOW2008
  • ASE Certified Mechanic
  • 41,814 POSTS
  • ASE Certified Mechanic
Hi Genefrase,

The head gasket should be giving the problem. The leak is not that big for you to be able to test with 30 psi.
Jun 17, 2008 at 10:47 AM
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