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Old 07-04-09, 11:08 AM
jeffrsmith jeffrsmith is offline
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Cadillac(s): '99 Cadillac SLS
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Re: Overheating over 60mph

Quote:
Originally Posted by Playdrv4me View Post
To the OP... you are having CLASSIC early headgasket failure symptoms. You need to follow Ranger and Sub's advice or you'll just end up finding out the hard way later.
I'll second that. When I first bought mine I wasn't aware of the HG problems. For the first three months of ownership the car ran fine, apart from having to add coolant on a regular basis, also noting that when I would open the fill cap there always seemed to be pressure. Then the car overheated on me, once. I tested for combustion gases in the coolant reservoir and guess what. I continued to drive it for another month and had no further instance of overheating or need to add coolant. When I pulled it apart the gaskets were shot. Good luck!