Identifying LS Engine

565bbchevy

Geezer
Aug 8, 2011
7,726
113
Michigan
So what do I need to look for to find out what exactly this LS engine came from that is transplanted in my 86' Monte
It appears to be a truck engine.

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motorheadmike

Geezer
Nov 18, 2009
5,597
113
Ottawa, Ontario Canada
D585 coils, earlier PCM, hmm... what are the 3 digits on the heads (PS front)?
 
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79MaliCrazz

G-Body Guru
Nov 6, 2010
577
28
Lake Wylie,SC
I heard so dont quote me to truly know what you have the oil pan needs to come off and its stamped on the first connecting rod or cylinder 1 connecting rod.
 
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oldsmobile joe

Royal Smart Person
Nov 12, 2015
1,394
113
mpls
doesn't look to have been modified. with that being said, check the head numbers as mentioned above. this should get you close.
the displacement is cast into the back of the block. 4.8l and 5.3l engines shared the same block, different stokes. iirc, 4.8l pistons were flat and 5.3l pistons were dished. a bore scope camera, or a sharp eye will help you here.
6.0l engines had their own blocks.
 
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pontiacgp

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Mar 31, 2006
28,998
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Kitchener, Ontario
it looks like a vortec to me, the LS doesn't sit so high and the serpentine set up is the same as I have on my SBC. As far as I know that serpentine set up does not fit on an LS engine
 

565bbchevy

Geezer
Thread starter
Aug 8, 2011
7,726
113
Michigan
it looks like a vortec to me, the LS doesn't sit so high and the serpentine set up is the same as I have on my SBC. As far as I know that serpentine set up does not fit on an LS engine
I don't know what the differences are between the 2 but the plastic cover says Vortec and the oil pan has this number on it.I don't see any numbers on the heads near the power steering.
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565bbchevy

Geezer
Thread starter
Aug 8, 2011
7,726
113
Michigan

pontiacgp

blank
Mar 31, 2006
28,998
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Kitchener, Ontario
In the description "OEM 99-02 Silverado Sierra Tahoe Yukon Vortec Engine Cover V8 Assembly. ". I think he stuck the LSX for more hits and if you had an LSX you'd know it..

 
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