2010 Dodge Grand Caravan 3.3L had one of the plastic Y pipes going to the heater core inside the engine bay burst and dumped all my coolant, causing the engine to overheat and I got the chime. When it chimed I immediately pulled over, was 100 yards from home at that point, let it cool down naturally and drove it the rest of the way. After I replaced the Y pipe with the Dorman aluminum one and filled it back up with coolant (2 1/2 gallons) I took it for a test drive. When I turned it on initially there was no problems while I warmed it up and bled the cooling system of air. But as soon as I backed out of the drive way and put it in drive it started misfiring, and withing 50 yards it set a misfire code on cylinder 3. Drove it 1/2 mile and back to verify, and yes, a bad misfire. No codes on any other cylinder. Before I yank the heads off and replace the head gasket, taking the heads to a shop to have them look at them and get them ready to be re-installed, is there any thing else I should be concerned with? I haven't seen any evidence yet of coolant getting into the crank case. I have not pulled the spark plug in cylinder 3 yet, I'll do that tomorrow. Both Y pipes have now been replaced with aluminum ones, wish I had done that before the failure, but hindsight is 20/20. Thanks for any advice.