changing a 5.3 block to a 6.0 using same accessories
11-24-2009, 09:07 PM
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changing a 5.3 block to a 6.0 using same accessories
hey guys so like the title says. i have a 2001 silverado ecsb with a 5.3l that needs to be tossed out. ive been told that ALL the parts i have on the 5.3 will bolt up directly to the 6.0. is this true? i have a guy selling me a 6.0 block crank pistons rods and cam for $500. will i be able to strip my motor and use all my accessories minus the heads? im changing the cam so i know ill need some heads and pushrods. so other than the heads pushrods will i need anything else that is specific to the 6.0? (i know ill need a tune aswell) also i have a stage 2 4l60E from Performabuilt---------> will i need to do anything to mate them up together adapter plates flywheel? Any insight would be appreciated.
11-24-2009, 09:16 PM
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do you know what yr model block the 6.0 is? well not the block, but the crank is longer in the early 6.0s. If it had iron heads(like outa a '99 or '00 2500) it would be the longer crank style. Problem is that you cannot bolt up a 4L60E, only a 4L80E.
11-24-2009, 09:28 PM
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also the 5.3L heads can be used on the 6.0L. Depending on ur goals for the motor, available funds, and the casting #'s you may want to use the 5.3L heads. I haven't built an LS motor yet, but I've done lots of research(mainly on this forum). I'm not sure on which casting #'s are the "good" ones to have, but any of them are going to raise your CR. Also, do you kno if ur getting a LQ4 or LQ9? The specific yr model would be nice to kno, because the later LQ4's used the same connecting rod bolts as the LQ9. Hopefully this will have saved you some time using the SEARCH feature.
11-24-2009, 10:30 PM
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thanks guys
Notwothesame, the block is out of a 2002 silverado 2500hd. so a 4l80E is 1 thing ill need.
JakebrakeIH, been looking for the past year on this site ls1tech and fsc. but some posts just give a general answer as in yes they will or no it wont but ill read other posts and theyll say i need little specific parts. Not trying to be a wise *** but ive searched the hell out of this thing.
another thing is if i do use my 5.3 heads what size gasket will need to get the compression ratio close to the stock 6.0.
heres the plan all my 5.3 accessories on a 6.0 block with l92 heads and a z06 cam. 1255308 i believe. i live in california where the smog ***** live so i want to keep it mild. again i appreciate your opinions thanks
Notwothesame, the block is out of a 2002 silverado 2500hd. so a 4l80E is 1 thing ill need.
JakebrakeIH, been looking for the past year on this site ls1tech and fsc. but some posts just give a general answer as in yes they will or no it wont but ill read other posts and theyll say i need little specific parts. Not trying to be a wise *** but ive searched the hell out of this thing.
another thing is if i do use my 5.3 heads what size gasket will need to get the compression ratio close to the stock 6.0.
heres the plan all my 5.3 accessories on a 6.0 block with l92 heads and a z06 cam. 1255308 i believe. i live in california where the smog ***** live so i want to keep it mild. again i appreciate your opinions thanks
11-24-2009, 11:10 PM
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Notwothesame, the block is out of a 2002 silverado 2500hd. so a 4l80E is 1 thing ill need.
Not the case man, starting in '01 they had the short crank with a spacer to be coupled to a 4L80E. You'll be able to use your Performabuilt 4L60E
another thing is if i do use my 5.3 heads what size gasket will need to get the compression ratio close to the stock 6.0.
Don't kno the answer to that one. Gonna have to kno the casting # before you'll be able to get that answered.
Since your motor came from an '02 2500HD it's a LQ4. It has a lower compression ratio than the LQ9(found in the SSS and Escalade) I'm not 100% sure but I'm thinking the comp.ratio will be up around 10.7.1 depending on head gasket thickness
Not the case man, starting in '01 they had the short crank with a spacer to be coupled to a 4L80E. You'll be able to use your Performabuilt 4L60E
another thing is if i do use my 5.3 heads what size gasket will need to get the compression ratio close to the stock 6.0.
Don't kno the answer to that one. Gonna have to kno the casting # before you'll be able to get that answered.
Since your motor came from an '02 2500HD it's a LQ4. It has a lower compression ratio than the LQ9(found in the SSS and Escalade) I'm not 100% sure but I'm thinking the comp.ratio will be up around 10.7.1 depending on head gasket thickness
11-25-2009, 12:52 PM
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Well if I were you no matter what heads u decide to do if there not milled get a .040 head gasket from cometic. This will tighten your quench thus giving u a bit more power. Just make sure to get copper gasket maker spray and spray them down really good before you instal the heads to ensure no leaks in the future. A 2002 6.0 will bolt right in with your 4l60e. If your putting a set of heads on try to make the compression between 11:1 and 12:1. If you have a good tuner u will still run on pump gas.
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11-25-2009, 03:00 PM
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If you don't have a converter yet, you can get a 2500 HD straight flex plate and have Yank build you a converter with a 80E backing plate and a 60 snout like I did. Problem was i already had a Yank... Oh well my buddy got a good deal on a 9" 3600 for his Z and I got the protruck 11" Yank that I can pull with...
I didn't kno about that. Thanks for the info, No matter how much you kno, there's always room for some more!
11-28-2009, 02:17 AM
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got it, converter with the 2500 flexplate60 snout and a 80 backing plate. thanks!!!!! thanks MPFD dint want to get rid of the stage 2 60e when it only has 500 miles on it.
i went and bought the 6.0 block, crank, rods & pistons with cam. brought it home last night and tossed the cam out. (anybody looking for a stock 6.0 cam?) after getting that stall made i think ill be good to go. any other little details i should encounter. now that i have the block im getting anxious.
i went and bought the 6.0 block, crank, rods & pistons with cam. brought it home last night and tossed the cam out. (anybody looking for a stock 6.0 cam?) after getting that stall made i think ill be good to go. any other little details i should encounter. now that i have the block im getting anxious.