Out messing with the car yesterday getting it ready to go racing tonight and let it run a few minutes then shut it down. Listen and I can hear a "hissing" sound, like a pool float that has a leak. I look around don't see anything so put it on jack stands and look in the location of the Knock Sensor (since I just replaced it). Thought maybe it was not in there right but the coolant was coming from the area that the dip stick tube is 'screwed' into the block. I thought the leak might have from around the head bolts but they are dry as a bone, it was dripping from the screw that the dip stick uses to go into the block. HOW IS THAT? I have been seeing some coolant on the starter but not enough to concern me too bad. But now I know where it is coming from. Now is that screw in or near the coolant passages, how would there be an issue there? What should be done? This is just odd to me..

 

Dont know... But thanks for the he post... I was going to look at my knock sensor and that area too... now it gives me something else to check out..
I have no coolant leak on the front of the car.. thinking it can only be... coolant sensor, knock sensor, (oil dipstick screw?), or on the back of my heads where the coolant lines run

 

Pull it and reseal it. Are you sure it's not loose?