Folks: I am having problems with my 16V '88 Jetta blowing antifreeze/coolant out of the overflow tank, then getting hot during city driving..... I am told the 16V head is prone to "Micro-cracks" in the combustion chamber area... Anybody have experience with this problem?? Or is this hog wash??? Please let me know what you may know, or any other areas I need to concentrate my efforts on ..... Thanks... BC