Many use the same damage heads... pitted head...and just hope for the best.

http://www.benplace.com/bjp_head2/head3_011.jpg

Coolant... water...are not the problems or solution, a bad head design is
the main problem....

so, you invest in 2 heads + installation or a re-seal? most people will go
on the re-seal... and hope for the best.

Cheers, Ben