block guard?


Junior Member
do you all recommend using block gaurds? if so, why and who makes a good block guard? if not, why?

would you use one on a ls/vtec, all motor?


Senior Member
some people do, others don't because it keeps coolant from reaching parts of the cylinder sleeve and it can create hot spots which aren't good.

98% of cracked sleeves START at the center, and work their way up.
the block guard at the top does nothing but add heat to the combustion chamber, leading to more detonation, leading to more cracking in the first place.

sleeve it, or leave it stock


Senior Member

The block guard won't prevent cylinder wall failure, it'll just catch the rod that would sling through the block, and even then, they don't always work.