454 cracked from freezing. heads crack too? always? sometimes? never?
 

bought a neglected arriva for the bravo setup. block cracked, manifolds cracked. do the heads survive, or usually die in this circumstance. they are probably peanuts anyway. just wondering if they were 100 dollar heads or 8 dollar heads at 10 cents a pound.

It's so f in cold out... bet there will be many cracked blocks to choose from this spring.I'd bet 10cents pound lmao

Last couple days have been brutal . Imo , kiss those heads goodbye unless the water was down some .

Pop off the intake. If the water passages are dry there may be a chance they lived.

this engine cracked a couple years ago. intake bolts so rusty i gotta take grinder to the heads. 226 total hours. shame what some people do to their boats.

derik,im afraid they are scrap iron.

Pull valve covers identify casting numbers and rock on bro . But remember 2 piece 4 bolt main caps which you may have , and 8 quart gen any pan have suprising value and easy pickings with the motor dumped on its head

Besides a brutal freeze pop on a gen 4 will zip the intake anyway .its ugly .i grab the crank pan caps and punt.

Had a couple blocks freeze up a few years back. Cracked above the lifter galleys and rnext to the freeze plugs on both sides. Blocks were junk but heads were fine.

GM should make freeze plugs out of paper mâché or PVC. I think I've actually seen three in my life time that actually suited their purpose. Lol