Silverado 4.3L LV3 V6 Bad Engine Teardown! Poor Maintenance & Design Is A Recipe For A Blown Engine

In this video, I tear down a 4.3L LV3 Gen5 V6 from a 2014 and newer Silverado or Sierra. This engine is basically 3/4's of a Gen5 5.3 sharing most of the architecture. This engine did not appear to be overly abused but could have been a higher mileage engine. Its unfortunate that the failure point was a problem that plagues this and the previous generation of engines.
I hope you enjoyed this teardown. As always I appreciate all of the comments, feedback and even the criticism.
Catch you on the next one!
-Eric

[jh]

Can we all take a moment to appreciate the fact that his videos get right to the point. No flashy graphics intro with stupid music for 10-15 seconds. No stupid carnival barker intro or whatever. Just fade in and boom...straight to business and right into the teardown, it's great

[heathwoodlee]

I love how Adam Sandler takes these engines apart so easily.

[drewsneddon]

"Its always more sanitary to go front to back...". You got a chuckle out of me with that...

[FIREPHILSPENCER]

Older 4.3 are some of the best v6 engines ever made.

[exconjon]

If you ever come across one of those 5 cylinder engines Izuzu and GM made, that would be an interesting teardown to watch.

[mschiffel]

Watching these modern engine teardowns makes me appreciate the old inline sixes and the 1st gen. small blocks even more.

[saltycreole]

May I just say, my wife changes the oil in her 2010 Ford Edge every 3k-5k, tops off all the fluids, (Constantly) checks her disc brakes like a neurosurgeon, listens for every noise she considers not normal and makes me pin it down whether it exists or not! 130, 000 miles and it runs like the day we bought it. The Ford mechanic after the warranty checkup actually told her this was the cleanest, best maintained, woman driven Ford Edge he's ever seen. She even picked up on the air conditioner filter that needed changing before the mechanic caught it. I ask you gentlemen, am I a lucky guy or what?

[kkdejour]

I'm really enjoying your tear downs. Modern engines can be so simple and yet so complicated. I like seeing the different engines and the way each manufacturer interprets what they want an engine to be like. Also showing the quality of them and letting us know the common failures of an engine from either the manufacturer or just neglect. Thanks. This is an invaluable resource for me and so many!

[hpijosh]

I have one of these in my 2014 Sierra with about 250, 000 miles and its been solid so far. It did pop the head off one of the exhaust manifold bolts so that's still a thing.

[jaredkennedy]

Wasn't the clean cylinder the one with the failed lifter? Without having fresh air to support combustion, the fuel that was still being injected would clean everything up pretty well.

[LeonTroutskiunplugged]

Another awesome teardown. Seeing the complexity of the "new" stuff keeps me in my comfort zone of iron pushrod engines of the 60's and 70's.

[jackdecker]

Best quote from this video. "Well....that's never going back together"! We have all thought it and it's about time someone said it.

[timskiff]

The 4.3 in my old chevy truck was a powerhouse. It was based on a 350 minus 2 cylinders. Had carb issues but ran good.

[matthewb]

This was very educational video. I haven't seen one of these engines pulled apart. Really good stuff.

[nickbrooks]

I work at a GM dealer and I've never seen one of the gen 5 4.3s have a lifter fail or any other major failure for that matter. Usually they're really solid engines. You can tell from the amount of varnish and sludge that this one was seriously neglected. That said the oil pumps on the Gen 5 V8 engines fail regularly in cold weather. The slide breaks and then you have no oil pressure. The lifters on the V8s fail regularly too especially on the 6.2. Don't get me started on the ones built post Covid in the 2021 models I've seen those have valve springs break at 50 km and lifters fail in 5000km. Seen three 2021 6.2s spin rod bearings at low mileage too.

[LJJKD]

I've got that engine in my '16, a good engine, always wanted to see a detailed tear-down, thank you.Unfortunatly the one example you have must have been beat the crap out of with poor maintenance

[acryss]

Great video. In defense of the Vortec V6, my 93 S10 2 door blazer was pretty quick and would get 24MPG in mixed driving. No NA 4Cyl could get 200HP and 260 lb-ft of torque in 1993 and the Ranger 4.0 V6 was at 145HP. With electric fan, shorty headers, cat-back, CAI, 3.73 gears, and under drive pulleys, I was hanging with Mustang 5.0s and beat a few who must not have been good with a manual trans. It was trouble free to 219, 000 miles and still going but passed on for the rust here in MI.

[scottamy]

I have this engine in my 2016 Chevrolet Silverado single cab short bed 4x4 and so far at 83, 000 miles it’s been great! I disabled the dod system with a Range plugin dongle and so far it’s been doing well! I run Pennzoil Ultra Platinum 5w30 and change it at about 4000 miles, I figure it’s cheap insurance to do a more frequent oil change and have given serious thought to adding a catch can as I’ve seen a lot of people saying it really helps! Thanks for a great video!

[Land_Raver]

This guy was great in Rookie if the Year. Never would of imagined him tearing down engines.

[ouch]

Looks like that engine had a typical “fleet” life. Probably spent its entire life at either full throttle or idle, and maybe got an oil change once a year from the cheapest possible quick lube joint in town.