[xrad]

Two nice blue sky days in a row. Had to do something while waiting for my new used transaxle. Jacked up the car and cleaned the undertray. About 1/2 inch of muck. Found a leaky hose clamp on the power steering cooler line and fixed it. Also replaced power stering reservoir as the old one had some serious cracks and leaks when filled more than 1/2. Also new down tube from reservoir.



Then I tackled the coolant. Original coolant looking brown and dirty. Drained out the old. Refilled with H20. Ran for a while. Cooled and drained and then refilled the system filling running and draining a few more times until mostly clear. Then refilled with Zerex. Nice and clean as I can get it.



Next will be sway bar mounts...

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[Cloud9...68]

Feels good to get that stuff done, doesn't it?



I'm not sure this is as big a deal as many make it out to be, but Porsche recommends using phosphate free anti-freeze. I suspect that if you use DI water, it doesn't really matter all that much which type of anti-freeze you use, but to be on the safe side, I've used the Prestone phosphate-free stuff by last two coolant changes. It comes in an orange bottle. You might want to do a search on the topic, and draw your own conclusion. I don't seem to recall a sound chemical reason the standard stuff isn't perfectly fine, but again, you might want to do your own research.

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[flash]

i am hoping that you didn't use tap water - the minerals in there cause deposits in the radiator and block it fairly quickly



re phosphates et all:



http://books.google.com/books?id=bGg-v7YxG...p;hl=en#PPP1,M1

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[xrad]

filtered tap water , then filled w/Zerex ....phos free 50/50 mix....



http://www.valvoline.com/pages/products/pr....asp?product=10



Yep..it does feel good to get some things done...



Flash..nice symposium...can read the whole thing for free

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[Cloud9...68]

Good, I'm glad Zerex makes a phosphate free anti-freeze. The Prestone version (I had the colors wrong - it's actually a silver bottle with orange cap) was the only one I was aware of.



Thanks for the summary, Flash. I'll read through it when I have some time. It's odd, though, that BMW doesn't recommend the phosphate free stuff for our 2007 328i. You would think the requirements for the two cars would be pretty similar. I'm not positive that the Bimmer has an aluminum radiator (I would assume so), but of course it has an aluminum block and head, as do the majority of engines nowadays,

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