Does anybody else here flush coolant the old fashioned way?

Joined
Dec 24, 2003
Messages
270
Location
Springfield,MO
 
 
 
When I do my coolant flush I still do it the old way:

1. Drain Coolant

2. Add 100% water to cooling system, start engine and let idle for 5-7 minutes with heater on full blast.

3. Repeat process 4-5 times.

4. When I add coolant at the end, I put in a 60% mixture to make a roughly 50% mixture.


It's more time consuming, but very easy. This was the method stated in old repair books, and a mechanic buddy of mine said they did it this way for many years.

Just wondering if I'm the only weirdo doing it this way.
 
Joined
Sep 16, 2005
Messages
5,192
Location
Ponte Vedra, Florida
 
 
 
I thought the old fashion way was to have a shop use the latest equipment available :) . Sounds like your way is a good way but it sounds like a lot of work. Also, my personal concern is for the environment and I don't have the facilities to capture all of the old antifreeze and keep it from contaminating the area.
 
Joined
Apr 28, 2003
Messages
2,482
Location
Turquoise Trail, N NM
 
 
 
That's how I used to do it until I discovered a bunch of residue at the block drain bolt (used a coat hanger to clear it). I think that residue was the green coolant or minerals reacting (PO used only green + tap water for 14 yrs) w/ the aluminum (kind of looked like when aluminum is constantly exposed to salt water, like on a boat...it crumbles into like a coarse sand). Coolant was changed every 2 yrs.

After switching to Toyota red+distilled water, during my last flush this year, there was no residue at the drain bolt! Nowdays, I drain the block, mostly because having the header means reaching the drain bolt is a cinch (in plain view) rather than being hidden under the exhaust manifold, and it saves time. If you've had only Toyota red+distilled water in the engine, I'd have no issues of doing it the old-fashioned way, but flush w/ distilled water rather than tap water.
 

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