I had the same problems as the oringinal post^^ also a lack if power, I took it as the headgasket, decided it was a good a time as any to replace with a uprated gasket, took everything apart,after reading this I'm begining to think maybe a little more coolant may have been better, but that doesn't explain the lack of power, wen I removed the head the fifth cylinder looked as tho it had steam cleaned it's self! Any ideas,