AES Racing

iTrader: (6)

I'm not even joking, never seen a 6.0 block like this before.
We get core blocks in from a supplier. They can be from anything, I've even received LY6 6.0 iron blocks, long as they're iron LS block he drops them off to me.

Any ideas? i'm thinking its a marine app. block? Forklift application?

The block measures correctly for 6.0, mystery block has fine thread main bolts.
Water jackets are slightly different. It uses long head bolts.

block on left is mystery block,




The Mystery block also had one of these for the timing chain

01cherryreds10

iTrader: (9)

Call me crazy but could that be a marine engine block? I know alot of the older marine engines had bosses without drilled and tapped holes for accessories and other things. That's really wierd though

3.8redbird

iTrader: (3)

either way thats still pretty cool. Wonder if its stronger than the usual iron block

PitchblackC3

iTrader: (3)

Doesn't the LSX block have double motor mount points like that? But they have coolant drain plugs on the front.
Dunno.

SMALLBLOCKHERO

iTrader: (2)

looks a lot like this block, but it doesnt have the 6 mount holes on this one.



http://www.gm.com/vehicles/innovatio...L96_Marine.pdf

SMALLBLOCKHERO

iTrader: (2)

actually...here it is.




See Larger Image GM Performance Parts 6.0L LS2 Aluminum Engine Blocks Engine Block - Aluminum - 4-Bolt Mains - 4.000 in. Diameter Bore - 2-Piece Rear Main Seal - Chevy - LS2 - 6.0L
Brand: GM Performance Parts, Mfr Part#: 12568950

01cherryreds10

iTrader: (9)

The one in the link above also doesn't have that tapped hole on the d/s of the block.

This couldn't be a 6.0 from a new Hybrid C/K could it?

PitchblackC3

iTrader: (3)

That is a alloy block you linked to there. Didn't you say the mystery block was iron?

SMALLBLOCKHERO

iTrader: (2)

the hole he has circled as tapped is on the block i posted.

he has no mention of what the mystery block is made of. just that he has received iron blocks from his supplier.

AES Racing

iTrader: (6)

Mystery block is pre 2004, has LS1 knock sensors, long head bolts etc.

Mystery block is iron

v8pwr

iTrader: (19)

I noticed the webbing @ the front on the passenger side (#2) is larger . What's the casting # ? Can you get a pic of the back of the block @ #8 where the ? marking is ? This has to be either a marine or possible industrial app .

quickbrick

iTrader: (5)

It looks to be one of indmar's blocks for marine use.

AES Racing

iTrader: (6)

I'd like to think its a marine block, I don't understand why the marine block wouldn't be listed in ie GMPP catalog, GM only builds parts for internal use, I couldn't image them giving .02 for designing a block entirely for marine use, i'd figure the factory 6.0 would suit the marine market.

One person suggested this block could be from Isuzu and/or Kodiak trucks.
http://www.isuzucv.com/engines/gas_index.html

quickbrick

iTrader: (5)

Duration of rpm and load is much higher for marine and cars don't go bouncing down the road either.

89 formula350

iTrader: (8)

I wouldnt be surprised if it was from one of those trucks. from what ive seen they do use similar ls parts but with the slightest differances.. those ls eng are the one that geat beat hard! FYI they were using the cast 2001-2002 f-body exhaust manifolds but with out any of the air or egr drilled. and yet they run so hard they crack these manifolds which ive yet to see an f-body crack one

427

iTrader: (3)

That looks like the early LS series of blocks. That tensioner for the timing chain was on the original pre production blocks also and was deleted before production. The venting holes were not in the original block until they did in car testing and realized the problems with windage in the skirted block. Looks like a pre production block from 1995 or 96. I had never seen a cast iron one......

Kurt

racer7088

I have seen a few of those here as well but they all worked fine. Don't remember where they came from but I think Detroit from Valvegod or something like that back in the day.

EricD

iTrader: (2)

pre production would make sence because it is iron and if , i remember correctly the pre productions were iron and i have a LQ4 sitting in my garage right next to an LS1 out of a 2000 vette and there is 6 mounting holes on one side and 5 on the other so it was probably casted in the original LS1 mold before the aluminum blocks , Eric

EricD

iTrader: (2)

I did some research in my GM bible and yes in the summer of 94 gm was testing gen3 aluminum and iron blocks and most of the tests were done on iron versions it was the C5 alpha phase testing but by the end of the year they were all casted out of aluminum and check this out gm put tewenty of these test engines in 95 camaros with alot of the corvette power train and chassis and they called them cormaros and they were driving these things around , so you may have a nice piece of history there , Eric