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L33 Iron Sleeve Change For Overhaul

ivilla

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ivilla Enthusiast

ivilla

Posted
Posted

i own a 2006 Ext Cab Z-71 with the L33 5.3L. This engine has 154,000 mi and I am preparing for the day when I may need a crate swap or engine overhaul. I love the L33 option and beleive it or not, I am extremely pleased and satisfied with the power. If I elect to overhaul the current L33, is it possible to change the iron sleeves in order to stay with the standard bore or will I be forced to bore to a larger diameter?

rogerf Enthusiast

rogerf

Posted
Posted

I recall reading where the iron sleeves on most aluminum block engines are set in place in the molds before casting so probably not replaceable. Most likely just hone them out and maybe go to a slight oversize. I've seen engines apart with a lot more miles than yours that barely show a wear ridge so wouldn't be too concerned about the bore condition unless something broke. Probably just getting a nice polish on them by now.

MS3DALE Senior Enthusiast

MS3DALE

Posted
Posted

I was just going to post....the sleeves are not serviceable,They do offer oversized pistons though.

csheatz Senior Enthusiast

csheatz

Posted
Posted

HAHA, this is good!

 

I work for the supplier of the sleeves! we make all the sleeves for the 5.3, used to make them for the 6.0 but that is no more. I personally dont know if they are pressed in or if the block is cast around them. But I do know once we turn the sleeve its only good for about 6 hours before its considered scrap. When we ship to GM its considered "ready to install" So I would think they are pressed in the block.

nickvrebel Senior Enthusiast

nickvrebel

Posted
Posted

I've torn down a 5.3L with a little over 100,000 miles (throw a rod through the side of the block due to over spinning the motor) - the remaining cylinders looked great at that mileage. I would suspect a nice light hone and it would be ready to rebuild. either that or pick up a low mileage used motor from a salvage yard, they can be had fairly cheap, probably cheaper and definitely quicker than a rebuild.

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