Bob, Anti-freeze does eventually wear out, and lose it's anti-corrosive properties. Then the metal parts start to rust and turn the fluid brown. Drain it all out and flush the system with a good radiator flush and refill with a 50:50 mix of antifreeze and soft water, and you should be OK. Most anti-freeze should last 5 years or so at least, although some folks recommend replacing it every 2-3 years. That's probably overkill, but yours is definitely due for replacement!
Lee Scott '87 C-27 #6350 header image LEE A. SCOTT Shelby, AL http://www.oldjags.com [email protected] <mailto:[email protected]> <mailto:[email protected]> b0bmann2 wrote: > > > In prepping for the winter here in Detroit, I decided to check the > anti-freeze level on my Universal M-18. The fluid is an awful, murky > brown, which i've never seen before. What to do? Radiator flush and > re-fill? Anything else? Why the discoloration now when it was fine the > last several years, have I finally worn it out? I was planning on > using Sierra to replace the fluid, is that OK? > > Bob Mann > > [Non-text portions of this message have been removed]
