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5.3 to 6.0 LY6 swap 09 GMC Sierra

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Old 05-16-2012 | 01:03 PM
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Question 5.3 to 6.0 LY6 swap 09 GMC Sierra

as some of you know a blew the 5.3 and bought an LY6 6.0, well, today as i was cleaning the engine and checking the block/ rotating , i found that the pistons have some very low but noticable play when you push them from front to back,
also the rod bearings look like they have a little ware , should i change that too?
the last thing is that the first cam bearing have copper colored spots, change or leave?

here are the pics:

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here is the cam bearing

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bore was smooth with no signs of ware

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the block was in great shape acctulay very slight rust consdering its a 2008 and the junkyard was close to sea!

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so what do you guys think?

Last edited by AKlowriderZ71; 05-26-2012 at 01:06 AM.
Old 05-16-2012 | 01:08 PM
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Piston clearance is measure on the skirts and the bore. Rocking the piston not mean nothing. Measure the pistons and bore.
Old 05-16-2012 | 02:19 PM
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bore is stock 4.00" the pistons are STD 6.0 pistons, nothing was done to the internals of the motor not even a slight mark of unbolting the con rods
Old 05-16-2012 | 09:46 PM
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orderd some parts from summitracing.com damn the shipping is killing me:suicide:

Your Order
Purchased items
Part# Item Price Qty Line Total

ARP-234-6301

Connecting Rod Bolts, Pro Series Wave-Loc, 2000 Alloy, Chevy, 5.7L, Kit

$116.51
1
$116.51

ARP-244-2901

Flexplate Bolts, Pro Series, 11mm x 1.5, .880 in. Length, Chevy, 4.8, 5.3, 6.0L, LS1, LS2, LS4, LS6, Set of 6

$21.79
1
$21.79

CLE-CB663HNK

Rod Bearing, H Series, Coated, Standard Size, Tri Metal, Chevy, Small Block, Each

$16.95
8
$135.60

CLE-MPB1

Plastigage, .004 in.-.009 in./ .102mm-.229mm, Range, Blue

$1.95
4
$7.80

CLE-MPR1

Plastigage, .002 in.-.006 in./.051mm-.152mm, Range, Red

$1.95
4
$7.80

CLE-MPY1

Plastigage, .009 in.-.020 in./.229mm-.508mm, Range, Yellow

$1.95
4
$7.80

CLE-MS2199HK

Main Bearings, H Series, Standard Size, Tri Metal, Chevy, 4.8, 5.3, 5.7L, Set of 5

$199.95
1
$199.95

DUR-CH-23

Cam Bearings, Bi Metal, Chevy, 4.8, 5.3, 5.7, 6.0L, Kit

$21.99
1
$21.99

FRM-XP5245

Spark Plug, XP Xtreme, 14mm, Tapered Seat, .708 in. Reach, Projected Tip, Resistor, Each

$5.95
8
$47.60

PPP-20-265S

Cab Roof Lights, Chevy/GMC, Smoke Lens, Amber LED Bulbs, Set of 3

$117.95
1
$117.95

Part Subtotal $684.79
Order Charges
Additional Shipping Charge $108.94
Delivery and Handling Charge $12.95
Order Subtotal $806.68
Total Charges $806.68 USD

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Old 05-20-2012 | 06:57 PM
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cleand up the pistons today , the piston rings need a change ? i dont know, im soaking them in gas , will clean check them tomorow hope they do,

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Old 05-20-2012 | 07:16 PM
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CYlinder walls should be honed and new rings installed on the pistons. Some people have successfully reused original rings but the chance that they dont seat is too big for me. You can get a factory set of rings for 150, cheap insurance.
Old 05-20-2012 | 07:36 PM
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89017484 is the part number,

its for 30$+ each, in our dealerships ,the only one has them in stock sells them for 41.35$ and thats for each piston, and they only have 4 piston sets !!
waiting on fel-bro dealer to get me the new ons

he said he can get me some perfect circle rings set for 8 pistons for 95$

they are made in India , are they trust worthy?
Old 05-20-2012 | 07:39 PM
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the sizes of the rings are 1.2mm top 1.5mm second 2.5mm oil
the 6.2/l92/ls3 have 1.5 1.5 2.5 !!! why are they differnet in thickness, i could have just take the ls3 set and grind a little
Old 05-20-2012 | 09:39 PM
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is it ok to use a 400 grit flex hone to do that by my self?
they say that 15-20 strokes with that will give the same result as a machin shop,with 1/2 the cost and faster
Old 05-25-2012 | 07:16 AM
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well , preping the block for paint last night , and painted the valve covers and coil bracket,

tell me what you think of the color, it is primer then red , then jut a touch of orange

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