Coolant leaking into 318 cylinder 8

Dartswinger70 said
As a rule the LA block can go .040 over. I know its a subject of debate but I've always remembered that .040 for some reason.

Remember that doesn't take into any consideration for how much corrosion there is inside the water jackets. And all it takes is a pin hole. His block would have leaked at .040 just as easy.