hello guys i just took the head off my motor so as to change the Headgasket.
and when i checked the cylinder head it seemed warped in the middle as there was a dip when i place a ruler across it !!
how can i ensure that the head is flat ???
will this be a big problem if i just put the head back on ???
if i sand the high area's so they match the low ones...should it be ok ???
what paper is best to use ??
any other advice please