As above really - block is in the car, head is off, head ready to go back on, but block still has remnants of gasket on it.
Someone who shall remain nameless advised me to use 600 grit wet & dry with WD40 on it to remove the crud, but that seems like a dangerous idea, what happens to the gunk? Sure, if it does down a water passage, then you can flush that out, but what happens if it goes down an oil passage? You end up with fine grained sand in the block, surely?
I've got a gasket scraper, but am loathe to use it on the block until someone tells me if i'm doing it right!
Someone who shall remain nameless advised me to use 600 grit wet & dry with WD40 on it to remove the crud, but that seems like a dangerous idea, what happens to the gunk? Sure, if it does down a water passage, then you can flush that out, but what happens if it goes down an oil passage? You end up with fine grained sand in the block, surely?
I've got a gasket scraper, but am loathe to use it on the block until someone tells me if i'm doing it right!