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porsche heats up after a while

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Hi guys...sorry to bother you but this is driving me mad...bought a porsche boxster 2.5 tiptronic(1997) 2 months ago and suddenly its temperature light keeps coming on...ive put water and it goes off but after a while (lets say 1 hour driving) it comes back on... any advices? i havent seen coolant fluid anywhere and ive changed the tap on the radiator just in case...




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Hello from Italy!

Can you post a video of the light flashing and temp gauge?

Does the light flash every .5 seconds, 1 second, or two seconds?

Where is the gauge needle point to when it flashes?

Is the coolant level remaining constant in the reservoir or is it leaking (or disappearing)?

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Pull up the trunk carpet near the coolant resevour tank and look for coolant. You may have a cracked tank (usually on the very bottom).

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I'm not quite clear. Are you losing coolant ? Is the light flashing or solid? From what I've seen here if it loses coolant it's most likely the coolant tank and if not it's most likely the coolant level sensor. There are several scenarios that can make this light flash. Engine compartment fan, coolant temp., coolant level. I just went through a similar problem on my 1999 911. There is a chart that shows most of the things that can make it flash. If your not losing coolant do a search or look at "Low coolant Light" under 996 series. They are very similar. Good Luck and don't give up.

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Believe it or not mine ended up being the engine compartment purge fan sensor had removed itself from it proper spot and was hanging down by the exhaust manifold. Far cry from having low coolant.

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