Originally Posted by ihiryu

Hmm. I don't want to throw any shade around, but you had a coolant leak, and then spun a bearing. Any possibility the tune issue? Sounds like you pressurized the cooling system on the dyno ?



If you ran too much timing, or too lean, it's definitely going to pop the head gasket, pressurize the system, and leak externally. Now normally I've seen when this happens coolant comes spewing our the reservoir, but I guess it's possible to leak out of some other seal BEFORE the radiator.



And of course, you now have a spun bearing. I just find it hard to believe that a lot of other guys are boosted on stock internals, making a bit more power than you, and so far so good on their stock motors.