88k on mine and no problems. Although i too think i may have a coolant leak in the heater core. How would you go about determining if the cooolant leak was the heater? There is no visible coolant under the car. Just another claim under the extended warranty policy
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Blueneonman -
'95 5.0L Mustang GT Convertible | K&N Custom Cold Air Intake | FMS 9mm Wires | Hollow Cats | Flowmaster 2 Chambers | BBK Subframes | 6-pt Rollcage | King Cobra Clutch | FMS Adjustable Clutch Cable | B&M Short Throw | Coolest Neon Lighting on a Mustang EVER!
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http://www16.brinkster.com/blueneonman/