2001 Chevrolet Tahoe 5.3 Engine knock - help to identify

[02_Tahoe]

Yeah, i bet this engine is toast, with the low compression + knock, i dont see it smart to rebuild with the machining needed.

With a new block, i will also replace the injectors since it is likely thats the culprit, coolant level is and always have been stable.

Hopefully the heads can be reused

Block is toast for sure. Heads should be fine and the crank should be ok too. A new block with pistons and rods is all you should need.
Idk how much you’re willing to spend but in that situation I’d look for a used low mileage engine. Probably going to be cheaper than a brand new block with new pistons and rods. Talk to the people selling them and see if they’d be ok with you dropping the pan and borescoping the cylinders. Make sure they aren’t full of sludge and the cylinder walls look ok.
If it’s not a daily and you’re willing to spend some money then perfect time to drop a 6.0 in there.

 

[kjetilaf]

Block is toast for sure. Heads should be fine and the crank should be ok too. A new block with pistons and rods is all you should need.
Idk how much you’re willing to spend but in that situation I’d look for a used low mileage engine. Probably going to be cheaper than a brand new block with new pistons and rods. Talk to the people selling them and see if they’d be ok with you dropping the pan and borescoping the cylinders. Make sure they aren’t full of sludge and the cylinder walls look ok.
If it’s not a daily and you’re willing to spend some money then perfect time to drop a 6.0 in there.

Been dreaming of putting a 6.0 in it, is it possible to flash the ecu to a 6.0 map? Without messing up the transmission, since i believe the ecu controls it all

From what i know, the 6.0 was mated to the 4l80, not 4l60e that is in mine. I also dont want to blow that trans up

There is not alot of engines for sale in my area. The few that is, is getting expensive..

 

[02_Tahoe]

Been dreaming of putting a 6.0 in it, is it possible to flash the ecu to a 6.0 map? Without messing up the transmission, since i believe the ecu controls it all

From what i know, the 6.0 was mated to the 4l80, not 4l60e that is in mine. I also dont want to blow that trans up

There is not alot of engines for sale in my area. The few that is, is getting expensive..

Haven’t looked into it in years so I’m not 100% sure but I know the pcm can control a 4l80e with just a flash so I don’t see why it can’t control the 6.0

Would definitely put a 4l80e in if you do a 6.0, that’s why I said if you’re willing to spend the money lol, should’ve added that. A built 4l60e has trouble holding up to a mildly modded 5.3

Where are you located (state) if you don’t mind me asking and how far are you willing to drive? You can find them if you look in the right places. Some places will ship them for a decent price.

Car-Part.com is a good place to look. It’s like a Craigslist for salvage yards. Some post mileage and price, some just post mileage and you have to call for price. It will tell you the name of the salvage yard and their contact info. Find one you like near you, call them up and see if they’ll allow you to look it over before you buy it.