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Hey guys,

My ride is a base 08 Cayman w/ 48k miles. Coolant light just went on this morning, checked the level and there was literally no coolant to be found on the low-max levels. I just ordered a gallon of Porsche coolant from Suncoast, but for the meantime is it safe to pour some distilled water in there until the coolant arrives? and if so how much should I pour in?

Thanks in advance
 

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Distilled?? Just fill it from the hose. :) It won’t hurt anything so long as it doesn't freeze. Hopefully you're not in northern California.

Edit: Ok... I wasn't positive so I checked and you really should use distilled water if you have it available. In a pinch you can fill it from the tap to get you home but then should flush it and fill it properly.
 

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Distilled?? Just fill it from the hose. :) It won’t hurt anything so long as it doesn't freeze. Hopefully you're not in northern California.
lol im from Socal, but ive been reading on these forums to use distilled, but i guess it wont matter. So how much water should i pour in sir? because if i fill it all the way how would i be able to pour coolant when it arrives? sorry im new to this.
 

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See my edit. I double checked for completeness. :) As for how much to add... if you need to drive it, I'd fill it right up. Do a bit of Googling as I don't recall off hand whether you check coolant levels hot or cold. When the new stuff comes, flush and refill but first make sure you figure out where it went.
 

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what is the ratio of the Porsche concentrate w/ water?
 

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See my edit. I double checked for completeness. :) As for how much to add... if you need to drive it, I'd fill it right up. Do a bit of Googling as I don't recall off hand whether you check coolant levels hot or cold. When the new stuff comes, flush and refill but first make sure you figure out where it went.
Thanks. any suggestions as to where i would look to see where the coolant went? does coolant normally evaporate over time which is why it needs to be filled? or perhaps a leak is involved..ugh.
 

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Thanks. any suggestions as to where i would look to see where the coolant went? does coolant normally evaporate over time which is why it needs to be filled? or perhaps a leak is involved..ugh.
How often do you get the car serviced? I mean... coolant will evaporate a bit over time, and if you've somehow managed to overheat the car I suppose you could boil some off, but under normal circumstances it doesn't get consumed to the point that you're below the minimum line. The reason I ask how often you get it serviced is that this is something a mechanic should look at as part of any regular maintenance. So it stands to reason that you've lost a bunch in a reasonably short time period which suggests a leak.

Have you noticed any dripping or puddles under it? As for where to look... well... hopefully someone with more experience than me can help here. I haven't got my car yet so I haven't really been able to poke around in one. All I know is that when I pop the hood, there's not gonna be a radiator sitting there with hoses going into it... so I won't even try to make suggestions. :D
 

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Add distilled water until you at least get to the Min level. Also keep track of how much you add because if it's not too much you really wouldn't have to swap out the coolant. Don't recall what the capacity of our system is but if you have to add only a small percentage the protection level will still be fine. And of course look for leaks. :cheers:
 

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Discussion Starter #10
How often do you get the car serviced? I mean... coolant will evaporate a bit over time, and if you've somehow managed to overheat the car I suppose you could boil some off, but under normal circumstances it doesn't get consumed to the point that you're below the minimum line. The reason I ask how often you get it serviced is that this is something a mechanic should look at as part of any regular maintenance. So it stands to reason that you've lost a bunch in a reasonably short time period which suggests a leak.

Have you noticed any dripping or puddles under it? As for where to look... well... hopefully someone with more experience than me can help here. I haven't got my car yet so I haven't really been able to poke around in one. All I know is that when I pop the hood, there's not gonna be a radiator sitting there with hoses going into it... so I won't even try to make suggestions. :D
don't think i've noticed any drippings or puddles underneath, I bought the car at 45k miles used, so i havent had any major service other than replacing axle boots. I will however bring it into my local indy shop for an oil change and have them check for any coolant leaks or water pump issues and just go from there. Thanks again.
 

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i think its 50/50
50/50 is correct. I had no leaks, but the coolant in my 997.2 was down to about 2mm above the "low" line...took just over a litre and a half of the mix to bring it to the "full" line. That was two months ago...and the level hasn't changed. Who knows, maybe the dealer did a service at some point before I bought the car and didn't completely fill it. BTW, when mixed the coolant looks an awful lot like pink windshield washer fluid...I kept the half litre I mixed but didn't use but clearly marked on both sides of the container (actually a recycled/cleaned windshield washer jug) that it was Porsche coolant, 50/50 mix. Not that my wife would ever fill up her washer fluid with a jug in the garage, but better safe than sorry. I don't know what coolant would do to the wiper blades and trim around the windshield, much less the washer fluid pump...but I'd rather not find out.
 
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distilled water for short term. You really need the lubrication provided by the Porsche coolant for the water pump to stay healthy (they are already weak on these cars). I've noticed two things about all german cars in general, their water pumps and wheel bearings are garbage compared to the Japaneese who make parts that last twice to three times longer for 1/2 the cost.

I just did a coolant and thermostat swap in a 1999 Toyota Camry V6 with 254,000 miles on it, on its second water pump at that mileage.

The last time I lost that much coolant that fast was on an Audi TT where the seal on the water pump failed, and then again a year later, but you can see the water pour out when you run the car... oh and the plastic impeller broke so I had to fish parts of it throughout the cooling system FAIL
 

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KwS_987,
Check the top of your rear under tray for signs of dried coolant from the water pump. It is a white-ish color when dry. I'm on water pump #3. Sometimes the coolant tank or the cap can develop a leak. The coolant tank cap should have a 4 in the last digit to be the latest.

+1 on distilled water.

Good Luck,

Rob
 

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The cooling system on a 987 holds about 6 gallons, so even a quart of distilled water isn't going to dilute the mixture significantly. But, as has been stated, where did it go? If the coolant has been flushed or any other cooling related maintenance has occurred (water pump is likely) in recent history, then it may just be some air in the system - not a leak. It's hard to completely bleed the system, So often there is need of adding coolant later.
 

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distilled water for short term. You really need the lubrication provided by the Porsche coolant for the water pump to stay healthy (they are already weak on these cars). I've noticed two things about all german cars in general, their water pumps and wheel bearings are garbage compared to the Japaneese who make parts that last twice to three times longer for 1/2 the cost.

I just did a coolant and thermostat swap in a 1999 Toyota Camry V6 with 254,000 miles on it, on its second water pump at that mileage.

The last time I lost that much coolant that fast was on an Audi TT where the seal on the water pump failed, and then again a year later, but you can see the water pour out when you run the car... oh and the plastic impeller broke so I had to fish parts of it throughout the cooling system FAIL
Am having the same problem. My Cayman S 2008 is giving me warning for more coolant. My Porsche shop recommended time add distilled water. Or he can fill it up for me but I have to leave the car overnight . It needs to cool
Down for 4 hours before we can put more water. Am really confused , I just need to add distilled water for Porsche coolant?
Neni Shriver
 

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Coolant is mixed with water in the cooling system, usually in a 50/50 mix. Since the cooling system holds around 6 gallons adding a little distilled water to top up doesn't really effect the mix ratio much.

The real question is where is the coolant going. Unless you've had work done on your cooling system recently any trapped air should have burped out long ago. Something to have your dealer check out.

You can top up with distilled water in the interim. Just make sure that the system is cold as it's under pressure when hot. It's good practice to put a rag over the cap when opening just in case. When it says Caution Hot it's for real.
 

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you can spot a coolant leak pretty easy under the car. It will look like dried ice cream and it kinda builds up, white or red or pink depending on the coolant used. Its usually a sign the water pump needs to be replaced.
 

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Make note of this: Cooling systems are NOT DESIGNED to CONSUME ANY COOLANT. If you're having coolant disappearing there is a leak somewhere. The leak might be minor and might not get worse - but chances are it WILL get worse at the most inopportune time in the most dangerous place. If you aren't skilled enough to really dig into the engine and cooling system I'd strongly suggest handing this off to a pro.
 

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I wouldn't totally agree with that statement and here's why:
If you over fill a cold engine or put more than the min in; when it gets hot it will dump the excess out the overflow.
So the next time you check it cold; the level will be lower but not because you have a leak but because level was higher than where it the system wants it to be.
My experience has been only fill it to min since that's where the system is going to adjust it to.

My guess is that these people who find that their car is 2 quarts low after 50k miles is probably because the car overheated at various points during that time and the owner just never checked it until the dash light came on. ? make sense ?

Power steering in pre electric steering cars suddenly have a problem and start burning parts up because people don't open the engine cover and ever check the fluid level plus Porsche stupidly puts the power steering where you can't easily check it and doesn't put a sensor on it to let the driver know - hey your PS's low, add some fluid. And they never did anything about it even after years of burning power steering racks and pumps etc. Their reply was "we are not seeing any problem with power steering" while websites like this were reporting - I burnt up my power steering rack, melted the lines and there is fluid all over the engine and it's burning when it hits the headers.
Well that's because in just normal street driving you probably will never use any fluid but once you start over taxing the system with bigger stickier tires and track events you do burn it up. Once I started checking my PS after every DE and added that maybe 1 once it was down then I never had a problem with it again. No special fluid or coolers or different pulleys needed. Just a splash of fluid needed.
 

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I wouldn't totally agree with that statement and here's why:
If you over fill a cold engine or put more than the min in; when it gets hot it will dump the excess out the overflow.
So the next time you check it cold; the level will be lower but not because you have a leak but because level was higher than where it the system wants it to be.
My experience has been only fill it to min since that's where the system is going to adjust it to.

My guess is that these people who find that their car is 2 quarts low after 50k miles is probably because the car overheated at various points during that time and the owner just never checked it until the dash light came on. ? make sense ?

Power steering in pre electric steering cars suddenly have a problem and start burning parts up because people don't open the engine cover and ever check the fluid level plus Porsche stupidly puts the power steering where you can't easily check it and doesn't put a sensor on it to let the driver know - hey your PS's low, add some fluid. And they never did anything about it even after years of burning power steering racks and pumps etc. Their reply was "we are not seeing any problem with power steering" while websites like this were reporting - I burnt up my power steering rack, melted the lines and there is fluid all over the engine and it's burning when it hits the headers.
Well that's because in just normal street driving you probably will never use any fluid but once you start over taxing the system with bigger stickier tires and track events you do burn it up. Once I started checking my PS after every DE and added that maybe 1 once it was down then I never had a problem with it again. No special fluid or coolers or different pulleys needed. Just a splash of fluid needed.
Augie is correct. Coolant system fluid expands when heated into the expansion tank and all expansion tanks have overflow tubes. If the expansion exceeds the expansion tanks capacity, it will overflow. There is no leak. It's designed to work that way. Therefore it's technically NOT a closed system. Particularly hot climates and with slight overfills, I live in southern Florida for example, can cause it to happen often. I add a little distilled water to my system, usually annually, and I do not have any leaks. I've had to do this every year for the past 12 years. The amount is negligible when capacity is considered. Agree completely with the power steering fluid issue.
 
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