CAVU

Recently a forum member added the wrong type of fluid to his tank and a number of suggestions were made as to how best to remove it all. I have been trying to figure out how to remove the summer fluid so that I could install winter fluid. I tried a variety of hose diameters and hand pumps that were suggested and there is at least one turn somewhere near the top that is not conducive to removing all of the fluid.

I had been using my Mityvac line (fairly small diameter) to try and extract it all and all I could get at was about 100ml out of about 6 liters. Then the idea hit me. I had taken enough windshield wiper pumps apart to fix them and realized that I should be able to connect the vacuum line into the output side and suck it all out through the pump outlet and not harm the pump.

At the end I dumped about 100ml of my winter fluid in to help flush out the rest.

So here it is in pictures.

Marine Blue

Thanks for the write up and pictures.

Does anyone know if leaving the same fluid in the system for a long time is detrimental? I've never used my washer fluid since buying my car and I've debated about draining it and leaving it empty.

Anyone know for sure what is the best approach to preserve the system?

Mark Harris

Afshin,

If you decide to remove your ww fluid I have one of the Mityvac's with all the different hose diameters if you want to borrow it.

On our DD cars I suck the oil out every other change instead of pulling the plug. Mityvacs are amazing.

Marine Blue

Mark,

Thanks for the offer, I may take you up on it depending on my findings.

I still need to figure out the best approach to this. I planning on bringing my car in for service in November before hibernation and I will ask the tech what he suggests.

I have a large mityvac too for oil changes, enough to hold about 8 quarts but I hate to mix it with washer fluid. If you ever need a large one let me know.

Quadcammer

oh for the love of god

user 72902

I just use the wiper fluid that won't freeze year round.

Marine Blue

To enlighten you, I had a corrosion issue with my 928 washer fluid system which was due to old fluid. Not sure how the new systems are set up but I really don't want to deal with that again.

Minok

What sort of strange fluids are being put into the washer systems that causes this problem of needing to drain. Unless you put a non-washer fluid in the tank.

BIG smoke

Always use PORSCHE branded windshield washer fluid. It is the only real performance sanctioned fluid for use in the Black Forest. It will not void your Warranty.

really? I just hold my finger on the squirter until the summer fluid runs out.
Then replace the fluid with -40 stuff. Seems like a lot of work.

Friends wife did fill her windshield washer reservoir with oil. That was a very blonde moment.

extanker

hard to believe aint it

LexVan

If you drain it, your car will be a little faster, too. Getting rid of a gallon of washer fluid is like picking up 1 HP.

CAVU

In a separate thread someone put ammonia based window cleaner in the tank.