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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 09-16-2016, 09:38 AM
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Edgy36-39 Edgy36-39 is offline
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Dealer Coolant Change

Did cooling and brake fluid at a recent CCA DIY event at a dealership. This is how they do coolant changes -- they need to move cars out.

Full post here: http://chrisparente.com/2016/09/15/n...-of-annapolis/
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Old 09-16-2016, 09:51 AM
MKJS MKJS is offline
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Nice write-up!

Does the rad pressure thing work by forcing new fluid through until all the old is pushed out, kind'a like the brake bleeder? Or does it actually suck the system "dry" and then refill under pressure? And is it all done with the connection at the tank? Guessing that would mean it actually sucks the system dry. But how does it vent when putting coolant back in??

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jim

Last edited by MKJS; 09-16-2016 at 09:54 AM.
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Old 09-16-2016, 01:11 PM
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Wgosma Wgosma is offline
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I bet that coolant system is similar in its workings to a system used for refrigerant. Probably a 3-way valve and vac pump; suck the old coolant out, change position of the 3-way valve and that allows fresh coolant mixture in. I could use one in my garage, but probably. It gonna happen- too much $$$ for way too little use- probably worth it to have shop with this setup do this every 3-4 years.
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Old 09-16-2016, 02:26 PM
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Edgy36-39 Edgy36-39 is offline
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Thanks. Sucks out, then pumps new fluid in. Here's the product writeup:

http://www.aecgroup.net/product/coolant/
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