Mass Coolant Leak, Then Nothing?

[LI996]

99' 996. 27k miles

About a month ago the low coolant light started blinking (slow blink). I topped it off and crossed my fingers hoping that it was just a little low (light went off everything seemed fine). Within 200 miles it was back on so I figured there was a slow leak. I let the car idle but couldn't find any trace of a leak. I brought the car to my mechanic (I'm lucky he's 2 minutes from my house). Had the car looked over but the mechanic couldn't find anything ether. I drove the car for a few more weeks (100 or so miles a week) with no problem until last night.

After a 60 mile spirited drive I parked the car, turned it off and roughly a pint or so of coolant began leaking from the rear, drivers side over the exhaust. I let the car cool down, refilled the coolant and started it up expecting to see where the coolant was coming from. Nothing happened, everything seemed normal (no warning lights). I drove the car 60 miles back to my house, the low coolant light started blinking slowly near my house. Still no sign of a constant leak.

[Loren]

99' 996. 27k miles

About a month ago the low coolant light started blinking (slow blink). I topped it off and crossed my fingers hoping that it was just a little low (light went off everything seemed fine). Within 200 miles it was back on so I figured there was a slow leak. I let the car idle but couldn't find any trace of a leak. I brought the car to my mechanic (I'm lucky he's 2 minutes from my house). Had the car looked over but the mechanic couldn't find anything ether. I drove the car for a few more weeks (100 or so miles a week) with no problem until last night.

After a 60 mile spirited drive I parked the car, turned it off and roughly a pint or so of coolant began leaking from the rear, drivers side over the exhaust. I let the car cool down, refilled the coolant and started it up expecting to see where the coolant was coming from. Nothing happened, everything seemed normal (no warning lights). I drove the car 60 miles back to my house, the low coolant light started blinking slowly near my house. Still no sign of a constant leak.

:welcome:

Most leaks only happen under pressure - so you would need to get the car good and warm.

From your description you have a coolant tank leak. Fairly common and Porsche has changed the design 4 or 5 times.

Do a search here or read through the DIY section if you want to fix this yourself.

[white99c2]

I went through the same exact issue for 6 months. My car even had pressure tests done on it. I first changed the expansion tank cap. Look under the drivers side exhaust pipe for signs of a leak, It will stain the metal. My expansion tank leak was very slow than one hot day last summer I went to Wal Mart Shopping came out and there was a puddle under the car. Coolant tank is my bet.

99' 996. 27k miles

About a month ago the low coolant light started blinking (slow blink). I topped it off and crossed my fingers hoping that it was just a little low (light went off everything seemed fine). Within 200 miles it was back on so I figured there was a slow leak. I let the car idle but couldn't find any trace of a leak. I brought the car to my mechanic (I'm lucky he's 2 minutes from my house). Had the car looked over but the mechanic couldn't find anything ether. I drove the car for a few more weeks (100 or so miles a week) with no problem until last night.

After a 60 mile spirited drive I parked the car, turned it off and roughly a pint or so of coolant began leaking from the rear, drivers side over the exhaust. I let the car cool down, refilled the coolant and started it up expecting to see where the coolant was coming from. Nothing happened, everything seemed normal (no warning lights). I drove the car 60 miles back to my house, the low coolant light started blinking slowly near my house. Still no sign of a constant leak.

[LI996]

Thank you guys very much. Your expertise is greatly appreciated.

[kbrandsma]

Thank you guys very much. Your expertise is greatly appreciated.

Check your coolant cap. If it ends in 01 replace it.

[roperin]

Ok, I have a 2001 C2 Cab, it was leaking coolant onto the exhaust pipe drivers side, leaving a white stain. I replaced the coolant expansion tank and cap. the car still gets hot, if the guage is linear in its readings it gets to about 195 degrees. I'm thinking I might have a look at the radiators for blockage and also replace the water pump and the thermostat. I hear no noise from the water pump but i can't think of anything else. how do i get at the thermostat? I watched the videos and read the tutorial but didn't hear anything about the thermostat. Thanks in advance for any help.

Roperin

Bob Leslie

lakeland Fl.,