Ah, where’s the fun in that? Amazing how much stuff accumulates in these blocks. If your block drain doesn’t drain with a lot of gusto, and your having over-heating issues, it’s your plugged block, not necessarily the thermostat or radiator or whatever (although those don’t help if plugged or non-functional.). The flow in the pic is after I blew air into the block drain and freed up a lot of junk after which the flow nearly cleared the far side of this very handy big bucket, especially with it being 20-deg. F outside (65 in shop). Fluid is evaporust.By all means don’t spend a bunch of money on a messed up F block.
Well I might take up the offer (?) if things look crappy after I inspect post-flush. In the meantime, have any extras of these that are functional?I’ve got 3-4 that I’ll never use