PointedThree - Photo DIY- Coolant Service a la Vacuum Method

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Photo DIY- Coolant Service a la Vacuum Method

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Posted 5/10/2009 1:26 PM

G-AMG
G-Class DIY Host

Date registered: May 2006
Location: South Texas
Vehicle(s): '04 G55, '80 280GE, '99 S420, '98 E320, 2011 E350
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Photo DIY- Coolant Service a la Vacuum Method

Yes, a very basic maintenance item, but one I think is overlooked, and often is POORLY and INCOMPLETELY performed.

Ask the "Stealership" *HOW* they do their $49.95 "Coolant" services...... I think you will find *MOST* will just drain the Radiator, and Refill.... end of story!
This leaves around 1/3 of the fluid still in the system. Yes, perhaps an infusion of fresh anticorrosive coolant is better than nothing,,,,, I believe in the WIS SPECIFIED method of Coolant Service as shown in this Post.

Personally I do Coolant Service every TWO years, instead of the "recommended" THREE years. I live in a horribly harsh environment of heat, humidity and salt, thus, my desire to have a more "accelerated" schedule. I also change the brake fluid ANNUALLY.

Please use care when working with the coolant system. ONLY open the system with temps less than 90C, and do it SLOWLY. Wear a face shield, gloves and protective clothing.

Apparently Zerex 05 is the "same" thing as the MB fluid for cheaper. WIS allow Distilled H2O. (Our water here is horrible).

I would strongly recommend the Vacuum Fill method. With the "Remote" expansion reservoirs, and their "weenie" tube with go to the radiator, it takes a long time to fill with the normal "gravity" method.. Plus you have the issue of "burping" out any retained bubbles in the system.