Brand new ls3 block deck flaw need help - LS1TECH



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Brand new ls3 block deck flaw need help

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Old 03-15-2017, 10:49 PM   #1
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Default Brand new ls3 block deck flaw need help

hi I recently bought a new ls3 block and the block has a casting flaw on deck. Should I be concerned? Also the steel liner looks like there is a gap between steel liner and aluminum casting. Please see pics.
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richard
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Old 03-15-2017, 10:53 PM   #2
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Here is pics.
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Brand new ls3 block deck flaw need help-img_1962.jpg   Brand new ls3 block deck flaw need help-img_1961.jpg   Brand new ls3 block deck flaw need help-img_1960.jpg  
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Old 03-15-2017, 11:11 PM   #3
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its not uncommon for them to be like that around the liner mine was similar although yours is a bit worse than mine was my machine shop told me it would be fine I would ask your machine shop tho to be safe
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Old 03-15-2017, 11:17 PM   #4
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My crate LS3 had a bit of a gap between the liners and the block as well. It seems the aluminum casting doesn't quite cover 100% of the liner surface as it flows into the mold. I suspect that structurally, it must not be significant, as they probably all have this to some degree--even below the deck where it is not exposed.

Mine did not have the surface imperfection yours has. I am not sure if that is something to be concerned about.
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Old 03-15-2017, 11:20 PM   #5
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Ok, just curious how much power are you running?
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Old 03-15-2017, 11:30 PM   #6
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im in the build process now working out compression issues was shooting for 11.5 max and im at 12.4 if I get my quench perfect shooting for 600 to the tire
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Old 03-16-2017, 12:06 AM   #7
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Thanks for the info, someone please let me know about divot
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Old 03-16-2017, 12:20 AM   #8
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Ive fixed dings like that with high temp metal epoxy. They make it in aluminum for industrial Air Conditioning applications like repairing ex-changers or pumps. Then just use a small block to smoooth it flush.
But usually its damage not a void, one option might be to have someone ultrasound the block just to make sure there are no serious voids in the casting.

Last edited by pdxmotorhead; 03-16-2017 at 12:48 AM.
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Old 03-16-2017, 12:27 AM   #9
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I don't think it's damage because every cylinder on that side has the same gap in the same spot, the divot is only on one cylinder.
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Richard
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Old 03-16-2017, 09:53 AM   #10
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Block was going to be used in a 700 hp build
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Old 03-16-2017, 08:56 PM   #11
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Where did you get the block from ? I just got one from Summit .
Going to have to look it over real good .
What heads are you going to run ?
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Old 03-18-2017, 04:54 PM   #12
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Mine has some of the same gaps on a couple cyinders
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Old 03-18-2017, 04:55 PM   #13
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Quote:
Originally Posted by pdxmotorhead View Post
Ive fixed dings like that with high temp metal epoxy. They make it in aluminum for industrial Air Conditioning applications like repairing ex-changers or pumps. Then just use a small block to smoooth it flush.
But usually its damage not a void, one option might be to have someone ultrasound the block just to make sure there are no serious voids in the casting.
more info on this metal epoxy?
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Old 03-18-2017, 05:15 PM   #14
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Glad I went and check over my block !!
It will be going back next week !!
Look at how far the sleeves are off !!

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Old 03-19-2017, 04:00 AM   #15
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Quote:
Originally Posted by 1973 STEP A SIDE View Post
Glad I went and check over my block !!
It will be going back next week !!
Look at how far the sleeves are off !!

It looks like that block suffers from core-shift... The sleeve thickness varies greatly.
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Old 03-20-2017, 07:07 PM   #16
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Yeah my cylinders are not bored on center as well like your pics, I found out the gap is from a non square bore
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