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Re: Cracked Block! [Re: Eric] #1525088 10/29/13 09:23 PM 10/29/13 09:23 PM
Joined: Apr 2007 Posts: 1,165 Central Ohio, USA Bigbeep OP super stock
Bigbeep OP super stock Joined: Apr 2007 Posts: 1,165 Central Ohio, USA	Quote: I've heard the 66' blocks are among the worst. I had one in the Duster and it broke also...with much less HP...If you want I have a 76 440 short block you can have...going to need some cleaning up.. Thanks Eric but I am ok on blocks here. Just not sure which way to go right now with the budget at hand. Thanks for the offer though. Beep

Re: Cracked Block! [Re: Bigbeep] #1525089 10/29/13 09:30 PM 10/29/13 09:30 PM
Joined: Apr 2011 Posts: 320 jonestown,pa D dmking enthusiast
dmking enthusiast D Joined: Apr 2011 Posts: 320 jonestown,pa	go with the 400 block. i have cracked a 73 440. up threw the mains and a crack between the freezrplugs all on the drivers side. i got a thick 440 late block. we shall see how this lasts but i will build a 400 next no more 440 that are stepped on sort of hard. good luck. 7905316-IMG_0057small.JPG (120 downloads)

Re: Cracked Block! [Re: roadhazard] #1525090 10/29/13 09:33 PM 10/29/13 09:33 PM
Joined: Apr 2007 Posts: 1,165 Central Ohio, USA Bigbeep OP super stock
Bigbeep OP super stock Joined: Apr 2007 Posts: 1,165 Central Ohio, USA	Quote: Sorry to see that John How do you manage to keep the side of that block so clean? Aren't they all that clean? Vacuum pump makes keeping the slippery stuff on the inside easy! doesn't seem to be working for the coolant though.............. Oh and some really, really good gaskets buddy! Beep

Re: Cracked Block! [Re: Wv68charger] #1525091 10/29/13 09:37 PM 10/29/13 09:37 PM
Joined: Apr 2007 Posts: 1,165 Central Ohio, USA Bigbeep OP super stock
Bigbeep OP super stock Joined: Apr 2007 Posts: 1,165 Central Ohio, USA	Quote: John I hate to see a post like this but I can tell you if and when you build another one it's worth the wait to buy an Indy block just be sure to have it checked out and go big if your budget can afford it you will be much better off. Yeah an Indy block is at the top of my wish list. But reality I'm sure, will keep me grounded. Beep

Re: Cracked Block! [Re: Bigbeep] #1525092 10/29/13 09:58 PM 10/29/13 09:58 PM
Joined: Aug 2008 Posts: 941 Texas, USA ChrgrCuda super stock
ChrgrCuda super stock Joined: Aug 2008 Posts: 941 Texas, USA	Dam, sorry to hear about this John. Like many of the folks that are 10 times smarter and more experienced then me, I would go with the 400 block as well. Good luck man, can't wait to see one of my favorite Mopars back up and running! 68 Cuda Notchback [Email]10.86@120[/Email] 69 Charger R/T 440/505 2009 Challenger SRT8

Re: Cracked Block! [Re: Bigbeep] #1525093 10/29/13 10:00 PM 10/29/13 10:00 PM
Joined: Nov 2003 Posts: 2,131 New Lenox IL cudadon top fuel
cudadon top fuel Joined: Nov 2003 Posts: 2,131 New Lenox IL	Quote: How much steam can you make with one safely? Thanks, Beep John my 400/493 makes around 750 HP. Flat tappet cam, 12.7 comp., nothing very fancy. Don 7905352-byronwheelie2012.jpg (127 downloads) http://i131.photobucket.com/albums/p314/cudadon/BKD6_09_10_191A.jpg

Re: Cracked Block! [Re: Bigbeep] #1525094 10/29/13 10:22 PM 10/29/13 10:22 PM
Joined: Jan 2003 Posts: 31,256 Oregon A AndyF I Win
AndyF I Win A Joined: Jan 2003 Posts: 31,256 Oregon	I've never seen a vertical crack in that location but the horizontal crack between the freeze plugs is very common. That vertical crack is interesting. There shouldn't be much stress in that area. Hard to say without looking at the parts during a tear down. Rotating assembly could be out of balance, maybe detonation, maybe something bad going on with the hard block.

Re: Cracked Block! [Re: Bigbeep] #1525095 10/30/13 01:59 PM 10/30/13 01:59 PM
Joined: May 2005 Posts: 1,032 ohio 6 67mprfan super stock
67mprfan super stock 6 Joined: May 2005 Posts: 1,032 ohio	[quote I have also been told that the 66 and 67 blocks were the thinnest in the area at the bottom of the water jackets. Beep I hope that's not true I got a line on a 66 or 67 block Sorry about the miss fortune 7905874-camerapicsdownload257.JPG (127 downloads) 71 demon stock stroke 440/indy ez-1 running 10.10 @ 132.14 mph in the 1/4 and 6.36 @ 107.46 mph in the 1/8 not in the same weekend but It did it then I sold it. 67 Belvedere that worked it's way in the 10's

Re: Cracked Block! [Re: 67mprfan] #1525096 10/30/13 02:49 PM 10/30/13 02:49 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	I think AndyF had a great thought - it could be the hard-block. R.

Re: Cracked Block! [Re: dogdays] #1525097 10/31/13 12:08 AM 10/31/13 12:08 AM
Joined: Apr 2007 Posts: 1,165 Central Ohio, USA Bigbeep OP super stock
Bigbeep OP super stock Joined: Apr 2007 Posts: 1,165 Central Ohio, USA	I am pretty sure it is a result of the fill. If you look at the vertical crack location, it starts about a 1/2" below the top of the fill. And the cracks along the side are at the bottom of the water jacket around the cylinders. No more bandaids on this one. Beep

Re: Cracked Block! [Re: Bigbeep] #1525098 10/31/13 12:31 AM 10/31/13 12:31 AM
Joined: Jan 2003 Posts: 6,591 Canton, Ohio S Sport440 master
Sport440 master S Joined: Jan 2003 Posts: 6,591 Canton, Ohio	Quote: I am pretty sure it is a result of the fill. If you look at the vertical crack location, it starts about a 1/2" below the top of the fill. And the cracks along the side are at the bottom of the water jacket around the cylinders. No more bandaids on this one. Beep No doubt IMO its a result of a Fill gone bad problem . Its probably and most likely effecting the roundness of the cylinders as well. The outside cracks can be easily welded with todays tech. But I wouldnt trust whats happening with the inside cylinders contorsions. Scrap it, IMO

Re: Cracked Block! [Re: Sport440] #1525099 10/31/13 09:07 AM 10/31/13 09:07 AM
Joined: Feb 2005 Posts: 20,279 PA. pittsburghracer "Little"John
pittsburghracer "Little"John Joined: Feb 2005 Posts: 20,279 PA.	Kinda funny how guys use concrete to prevent problem and then it causes other issues. 35+ years of running stock blocks and NEVER filled one yet. Concrete's for sidewalks, driveways, and in-ground swimming pools. 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.38@138.67 Livin and lovin life one day at a time

Re: Cracked Block! [Re: pittsburghracer] #1525100 10/31/13 12:57 PM 10/31/13 12:57 PM
Joined: Mar 2006 Posts: 9,910 Eighty Four, PA B G Racing master
B G Racing master Joined: Mar 2006 Posts: 9,910 Eighty Four, PA	Unless the inside of the block is perfectly clean the hardblock will not adhere to the casting and water will migrate between the wall and filler.We have seen poured blocks that cracked similar because the fill closed of water circulation and caused overheating and with expansion cracked the block,no freezing involved. Last edited by B G Racing; 10/31/13 01:09 PM. [IMG]http://i430.photobucket.com/albums/qq21/ajcasini/max_zpsdppwd9km.jpg[/IMG]

Re: Cracked Block! [Re: B G Racing] #1525101 10/31/13 07:24 PM 10/31/13 07:24 PM
Joined: Nov 2008 Posts: 363 Aubrey, Texas O oldtimer5151 enthusiast
oldtimer5151 enthusiast O Joined: Nov 2008 Posts: 363 Aubrey, Texas	I have never been a fan of filling the block with any thing except coolant. There are hormonics inside that have to be asorbed. Oil and coolant do more than their share of absorbing the these bad boys. Filling the block with a hard surface just intensifies these hormonics. Like Bob said if it is loose it will act like a hammer inside.

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