Originally Posted by rwthomas1

Thanks for all the info so far. The waterpump was new 1 year ago. The plastic tank is not cracked. The coolant is pushed out the overflow/boilover tube until the coolant level drops down to just below the seam in the plastic tank. No way the tank is leaking, it would be pretty obvious. This strange habit of puking up coolant until it gets down to the "normal" level is the most perplexing part of this. How exactly do I test for a blown/leaking headgasket to rule that out for sure? Why would there be coolant in the oil? Blowby to the combustion chamber? I would think there would more likely be evidence of combustion gases in the coolant? The car doesn't use any coolant once it has puked out enough to get down to the "normal" range. "Normal" for this car anyway. If the radiator is plugged wouldn't it heat up running hard down the highway? I will pull the radiator and have it flow tested. Thanks all, RT