Re: will 29 deg. crack my block?
if it were mine, i would. i agree w/dons, the weatherman don't know all and anytime he says it's even getting close to freezing, i'm out draining the block and manifold. agree w/others too. might as well learn to do it yourself. then ya can drain it and know it won't freeze. freeze cracks are preventable with a small amount of time invested... the consequences of draining too late are very serious and expensive...
side note. it's 32* out right now per noaa at my location. has been for about an hour. my outside thermometer says 36* and my glass of water in the backyard is not started to freeze yet... this time of year i watch the est. forecast temps close. picked a nice day to winterize since the est. temps were forewarned. my boat was drained empty a week ago and two days ago reconfirmed it was empty and filled w/anitfreeze.... so, i'm not worried..... preventative maint. goes along way to peace of mind....