Cheapest way to repair an overheated engine maybe blown gasket or warped head in a 1988 300ZX Nissan non turbo
Read have some additives guarantee to repair warped or blown gasket in the web
There is no cheap way without damaging things further, those additives are meant for big Diesel engines as a temporary fix, if you put them in today's cooling systems they plug up vital ports and other cooling system componets thus creating more problems than helping.
Search Nissan 300ZX Questions
Nissan 300ZX Experts