Join Date: Dec 2007
Car: 2001 Legacy 2.5
Feedback Score: 0 reviews
Here's a funny theory, but I'll throw it out there since we're talking about stop-leaks.
On the 2 cars I needed to add the Bars Liquid Aluminum stop leak to, what happened is both were very neglected and had old green coolant. We're talking several years old and when I drained/flushed them, lots of white, powerdery stuff came draining out (I'm assuming that's the silicates and/or phosphates that have dropped out over time).
Anyway, I refilled both with Peak Global (no silicate/phosphates). Not that long after, both started using coolant. Now I'm not saying the Peak Global caused this, but here is my theory. The old, dirty, silicate-filled coolant was acting like it's own stop-leak! When I drained that out & put the good stuff in, no more crud to stop the leaks (wherever they may be, both cars had no visible external leakage).
What does everyone think about this theory of mine?