Originally Posted By: eljefino
Originally Posted By: TechnoLoGs
I try to quickly open then close the cap after it is shut off, a few times, when it is hot. Is that helping?
No! In normal conditions there's a small vacuum under the cap, when it gets big enough it slurps a little coolant from the overflow tank. Opening the cap removes this vacuum and it has to start over with a couple heat/cool cycles to get back where it needs to be.
In other words, it's a siphon, and it needs a little water to get working. It sets up automatically, except when you mess with it, which seems to be most of the time.
I see.
So, if you were me, you would STOP messing with the cap, keep an eye on the overflow, and let it set up that way?
If so, I will just put the rest of the antifreeze in the overflow and take this long drive to PA tonight...
and javacontour, it appeared to do so first warm-up of the day, and knowing its probably original Stat, me as el-cheapo right now hopes it cleans up, but Eddie's description was the best. Though it USED to fluxuate when taking off from lights, but coolant was low and dirty then.