You should have a50/50 mix. Pure coolent doesn't work properly. I can't explain the reason, perhaps someone else has the explaination on this? John Imperial59crown@xxxxxxx wrote: > Today I went and bought an overflow canister, and > installed it in all of five minutes. It seemed to do the > trick, since I took her out for a long drive, both city > and freeway, and the temperature stayed right around 190 > degrees, climbing to 200 during long stop lights, but then > returning to 190 when rolling again. I would like to clean > out the system, but have no idea how to do this. The > radiator was flushed when I originally had the car in for > servicing, but I doubt the lines through the engine were > routed out. I'm pretty sure the radiator is running with > pure coolant, and no water, and since I live in Southern > California there is really no need for antifreeze. Would > it be beneficial to add water? Many of the coolants say > right on the label, do not add water. I also took Philipes > suggestion and took out my tranny dipstick, and put it on > the floor of the back-seat. I then put about a two foot > length of wire mesh clear hosing over the dipstick spo ut, > and attached it to the same bracket the window washer > fluid bag is attached to, and ran it to the front of the > engine compartment to drain, that is if the fluid gets > that far, since I also left a few coils in the hose. This > is a temporary fix to the tranny fluid ejection I get when > cold starting the car, which is due I think to the > breather hole being blocked by gasket. I haven't tested > this one out yet, but so far I need to refine my device, > since one of the coils must have come to close or touched > the exhaust header, and slightly melted it. I'll keep you > posted on how this one works! > Bill '59 Crown