Another overheating thread

[twobjshelbys]

Originally Posted by elmariachi

So you are saying either:

1. The 10-12 ounces of coolant that is leaving your system (and now going in that plastic bottle) is enough to make your temperatures fluctuate to such erratic levels; or

2. You had more air in the system that needed to be burped out; or

3. You needed more radiator cap; or

4. Some combination of the above.

I am surprised anything can get past that 20 lb cap, but maybe that's common for that engine platform.

1. It's a 1 liter bottle so it is shifting out more like a quart.

2. I might have had more air. When I started the engine to warm it up the expansion tank was empty. I let the engine warm up again and slowly added water (no more experimenting with 50/50) until I could see it flowing again but then it go too turbulent so I turned the engine off and then filled and capped the tank. There was a little water in the bottle to provide a vacuum. Then I took it for the drive.

3. I did put a 20lb cap on an yes, it still blew some by.

This morning when it was cool it had not pulled back into the expansion tank as I expected. That could be because the cap is just too much. The bottle was about 1/2 full and the tank was just below the baffle line so there was no loss in the system. I may try the 16lb cap again to see if it'll pull back.

I'll go on the search for a bladder-type overflow I guess.

Hard to believe the engine produces that much heat but I guess it does.