my lsvtec was smoking white in color and i decided to take the head off and spray the head gasket with copper spray and put it back on and when i did the car didnt start i checked the compression and it had about 60 in all cylinders what happend did i forget something or does the headgasket need to be changed and not sprayed with copper spray. p.s. i reused the gasket

 

replace the headgasket...its one of those non reusable parts