Max overbore Gen V 5.3?

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Aug 17, 2021 | 07:20 PM

sgilbert1967

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Max overbore Gen V 5.3?

Do we have a situation like with the LH6 Gen IV 5.3L where we can push these Gen Vs out to 3.902-3.905 then run the stock forged L8T 3.860 crank giving us a nice cheap fully forged 370ci ( with the rods and pistons) with little machine work?

Thanks

Aug 17, 2021 | 08:14 PM

01CamaroSSTx

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I haven't found a piston manufacture that offers a piston for the L83 that's any higher than 3.80 bore.

Aug 21, 2021 | 04:38 PM

snowman47

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What about the 4.3 LV3 pistons? Can these go to 3.92"

Sep 29, 2021 | 01:58 PM

WyattDerp

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Quote:

Originally Posted by sgilbert1967

You would have to it sleeved the cylinder liners in them from GM are on the thin side, about 90% sure max over bore per GM is .5mm for service repair. I have a piece of broken liner I can get a thickness measurement for the factory sleeve if you need.

Dec 17, 2024 | 04:23 PM

BR3W3R

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Quote:

Originally Posted by WyattDerp

There are two different l84 gen v engines. Some have spray welded cylinders which are very thin. Some have sleeves already. You seem to have spray welded cylinders. I believe 21-present have spray welded cylinders