So how did this happen?
#1564911
01/18/14 12:33 AM
01/18/14 12:33 AM
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Joined: Sep 2005
Posts: 570 Brea, Ca
Dart Racer
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A couple of days ago I was preparing the car for the new season and discovered what I thought was a single crack in the block on the passenger side which runs from the top of the front freeze plug to beyond the top of the back freeze plug. Today while pulling the motor I discovered that the driver side is also cracked in the same place. Whoa!!!!! I consider myself lucky as the car was running fine last time out, and to think about what could have happened just sends chills down my spine. Details: 500 Wedge all motor, 625 HP, 727, No trans brake, motor plate with straps from the frame to the motor mount bosses on both sides. Any thoughts so I don't have the same thing happen again, if by chance I did something wrong that I don't know about. Thanks ole wise ones......
Last edited by Dart_racer; 01/18/14 03:07 AM.
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Re: So how did this happen?
[Re: bigdad]
#1564913
01/18/14 12:50 AM
01/18/14 12:50 AM
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Quote:
Did you have ani freeze and did it get cold enough ?
I am in California and the car is kept in a 72 degree temp controlled shop.....
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Re: So how did this happen?
[Re: Dart Racer]
#1564914
01/18/14 01:01 AM
01/18/14 01:01 AM
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Anonymous
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Anonymous
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Don't know your setup, but torque straps to one of the mounting bosses is never a good idea.......
I don't get why the passenger side would be cracked also though....unless....do you have rigid straps on both sides ??
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Re: So how did this happen?
[Re: Dart Racer]
#1564915
01/18/14 01:02 AM
01/18/14 01:02 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Quote:
Quote:
Did you have ani freeze and did it get cold enough ?
I am in California and the car is kept in a 72 degree temp controlled shop.....
Do you have engine limiters on both sides(to each mount) and does the crack start near the mount ears
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Re: So how did this happen?
[Re: MR_P_BODY]
#1564918
01/18/14 03:01 AM
01/18/14 03:01 AM
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[quote Do you have engine limiters on both sides(to each mount) and does the crack start near the mount ears
Yes, engine limiters on both sides and attach to the motor mount attachment points. Crack starts right at top of freeze plug and runs horizontally past the rear freeze plug.
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Re: So how did this happen?
[Re: 80fbody]
#1564919
01/18/14 03:03 AM
01/18/14 03:03 AM
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Quote:
Is this a filled block?
Yes, filled to the bottom of the freeze plugs
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Re: So how did this happen?
[Re: ]
#1564921
01/18/14 03:06 AM
01/18/14 03:06 AM
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Quote:
Don't know your setup, but torque straps to one of the mounting bosses is never a good idea.......
I don't get why the passenger side would be cracked also though....unless....do you have rigid straps on both sides ??
Yes strap to each motor mount boss.
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Re: So how did this happen?
[Re: ]
#1564922
01/18/14 03:11 AM
01/18/14 03:11 AM
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Joined: Sep 2005
Posts: 570 Brea, Ca
Dart Racer
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Quote:
Don't know your setup, but torque straps to one of the mounting bosses is never a good idea.......
I don't get why the passenger side would be cracked also though....unless....do you have rigid straps on both sides ??
Where should they be attached? I never considered the motor mount boss wouldn't work given that's what point the factory used to hold the engine.
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Re: So how did this happen?
[Re: Dart Racer]
#1564923
01/18/14 03:26 AM
01/18/14 03:26 AM
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Joined: Feb 2003
Posts: 1,942 Metro Detroit
OUTLAWD
top fuel
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top fuel
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Metro Detroit
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Had a 66 block that did the same thing. Rubber mounts, only 540 hp.
Faster, Faster until the thrill of speed overcomes the fear of death...
71 Swinger - slowly collecting dust/parts 66 Belv. II - just a streetcar 88 Mustang - turbo LS beater
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Re: So how did this happen?
[Re: Dart Racer]
#1564924
01/18/14 03:46 AM
01/18/14 03:46 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Quote:
Quote:
Don't know your setup, but torque straps to one of the mounting bosses is never a good idea.......
I don't get why the passenger side would be cracked also though....unless....do you have rigid straps on both sides ??
Where should they be attached? I never considered the motor mount boss wouldn't work given that's what point the factory used to hold the engine.
The original mounts were rubber so it didnt slam anything... I dont know the relationship between the freeze plug holes and the mount ears on a big block but if the ears are near the crank and a weak block then MAYBE thats your problem... I have limiters on both sides on my SB to the mount ears and havent hurt any block... a pic would really help
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Re: So how did this happen?
[Re: Oyvind Mopar]
#1564928
01/18/14 10:49 AM
01/18/14 10:49 AM
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Joined: Jan 2003
Posts: 21,083 Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,083
Niles , Ohio
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My 65 casting 440 block cracked between the soft plugs also.It was in for 30 years.Never dripped and never froze.At the machine shop they found the crack.Now I run my 70 block.It ran on OE mounts and wasnt making a ton of HP.Rocky
Chrysler Firepower
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Re: So how did this happen?
[Re: Dart Racer]
#1564930
01/18/14 11:34 AM
01/18/14 11:34 AM
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Anonymous
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Anonymous
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Quote:
Quote:
Don't know your setup, but torque straps to one of the mounting bosses is never a good idea.......
I don't get why the passenger side would be cracked also though....unless....do you have rigid straps on both sides ??
Where should they be attached? I never considered the motor mount boss wouldn't work given that's what point the factory used to hold the engine.
The original mounts were bolted to 3 points on each side....if u have rigid straps going to only one of the bosses.....that's where the problem lies imho
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