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Marv D · 08-08-2014, 02:40 PM

The deck on the 511 casting is thin to begin with. If someone 'cleaned the threads' with a standard tap.... and old corroded bolts were used.... good chance he pulled the threads out of the deck. New bolts or studs ain't gonna fix that!

The 400 deck and bolt holes are a weak link for sure, Here's a 509 casting that was making just over 650 at the crank, was pushing the head up hard enough to pull the deck, cracking it from the bolt to the water ports and it pinched the piston enough to turn it to junk. Sometimes 'studs' work too good LOL

http://www.small-block-chevy.com/ima...0/400blk_a.jpg

http://www.small-block-chevy.com/ima...0/400blk_b.jpg

Think maybe we discussed this early in this thread (or in another),, sorry if it creates an echo

08-08-2014, 02:40 PM	#81
Marv D Registered Truck Offender Join Date: May 2008 Location: hells training ground (aka Ariz) Posts: 3,118	Re: 400/406 Builds The deck on the 511 casting is thin to begin with. If someone 'cleaned the threads' with a standard tap.... and old corroded bolts were used.... good chance he pulled the threads out of the deck. New bolts or studs ain't gonna fix that! The 400 deck and bolt holes are a weak link for sure, Here's a 509 casting that was making just over 650 at the crank, was pushing the head up hard enough to pull the deck, cracking it from the bolt to the water ports and it pinched the piston enough to turn it to junk. Sometimes 'studs' work too good LOL http://www.small-block-chevy.com/ima...0/400blk_a.jpg http://www.small-block-chevy.com/ima...0/400blk_b.jpg Think maybe we discussed this early in this thread (or in another),, sorry if it creates an echo __________________ Still playin with trucks, even at my age! When you're dead, it's only a problem for the people around you, because you don't know you're dead. .....It's kinda the same when your STUPID. I just did my taxes and reviewed my SS statement. Thanks to the current administration it looks like I will only have to work till noon on the day of my funeral.