Hold up and email <a href="www.engnbldr.com" target="_blank">EB</a> He has a cube you can put in there. The powder stuff is DEATH.

Troubleshoot a bit more. Pull your plugs; usually if a plug is white, then likely coolant is present.

Other non-invasive checks are a leakdown to check the top end, a cooling system pressure check, and a coolant test to test for the presence of exhaust gases.

Figure out what to do from there, but do those checks BEFORE you go adding any product to your system and considering your options. <img src="/forums/images/graemlins/shame.gif" alt="" />

My plugged nickels.