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06-12-2017, 09:17 AM
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#1 |
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Junior Member
Join Date: Dec 2009
Location: Winnipeg, MB
Posts: 92
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Block deck crack
Is this a dead soldier ??
Found this crack on lower right corner of #7 from water jacket across the deck into a head bolt hole. My immediate reaction is scrap... Any thoughts on this? Thanks, Gary |
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06-12-2017, 11:36 AM
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#2 |
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VIP Member
Join Date: Jun 2007
Location: Northern New Jersey suburbs
Posts: 2,314
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Re: Block deck crack
No.....
A crack extending into the cylinder would be bad. The head bolt hole is already open to the water jacket on a stock block so the only issue is thinking about the crack getting worse or some movement that caused a head gasket to leak or fail. I can never recall seeing one like that...... It could be repaired using the stitch weld process and an insert in the head bolt hole.....I'd probably use a stud in that hole instead of a bolt...... It is basically a matter of cost vs how valuable or irreplaceable something is....and what is the intended use of that block....
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Rich Biebel S/C 1479 Stock 147R |
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06-12-2017, 11:56 AM
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#3 | |
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Re: Block deck crack
Quote:
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Mike Pearson 2485 SS |
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06-12-2017, 06:38 PM
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#4 |
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Senior Member
Join Date: Feb 2002
Location: Southeast Michigan
Posts: 909
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Re: Block deck crack
Welding up there at the top of the bore ? What would that do as far as bore distortion ?
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06-12-2017, 06:46 PM
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#5 |
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VIP Member
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Location: Glendora,Calif.
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Re: Block deck crack
Does that crack go all the way through the deck?It might be possible to groove it, stitch weld it, then resurface the block. Wall distortion shouldn't be a problem unless an inordinate amount of heat gets applied to the block, but recheck the cylinder for roundness afterward .
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06-12-2017, 09:42 PM
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#6 |
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Junior Member
Join Date: Dec 2009
Location: Winnipeg, MB
Posts: 92
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Re: Block deck crack
I'm 99 % certain it is completely through the deck. Threads are damaged in the hole already so it needs an insert. I am a little nervous that an insert may force the crack open once loaded.
It's just a street engine 427 11:1 SRP stock crank and rods so not fancy but not looking to build a steamer either. Thanks for the input everyone ! Gary |
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06-12-2017, 10:02 PM
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#7 |
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Member
Join Date: Nov 2005
Location: Waldorf Md
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Re: Block deck crack
Gary,
If you want to spend the extra money the Loc n Stitch inserts http://castingrepair.locknstitch.com...sh-through-fft would be nice but in all reality a Timesert would probably be fine for a street engine. I don't think you would have to worry about decking it. With the timesert a bolt should work just as good as a stud.
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Bill Koustenis |
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