1997 Dodge Intrepid over heats coming out of over flow bott

1997 DODGE INTREPID
135,000 MILES • 6 CYL • FWD • AUTOMATIC
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STEVEN123456789
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  • 1 POST
the car keeps loseing antifreeze out of over flow bottle i change thermostat and there is no antifreeze in oil i start it and when it gets hot the water surges up and down in over flow bottle
Oct 31, 2009 at 1:42 AM
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CH112063
  • ✓Experienced Mechanic
  • 1,320 POSTS
With high mileage, a leaking headgasket will cause combustion pressures to enter the cooling system but may not allow it to enter as much on the intake(vacuum) stroke. You can test it a couple of ways.
Maybe a cylinder head crack also. It is common and a set of gaskets fixes it most of the time. Check it for that using a pressure tester or engine coolant combustion tester kit. It's being burned through the exhaust many times so you won't see it accumulate in the engine oil.
Oct 31, 2009 at 12:08 PM
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