GM ( Chevrolet or GMC ) 4.3 L V6 Engine Tear Down

[@thebeardofgaming81]

When you was taking the heads off, i was wondering if you was going to loosen the bottom short bolts. Lol, everyone is human and im sure there was no pressure from the camera. Ive been a mechanic for 25 years, I still watch videos on this stuff. You are never too old to learn!

[@vanhalenps4]

This video was exactly what I needed to see. I have an S10 with what I believe to be head gasket issues. It's sat forever because 1200$ is too much to fix it and I've been scared to do it myself...Until now. The intake manifold/throttle body etc. comes off as one piece? Fantastic. Cylinder head can stay assembled? News to me! Outstanding. Thank you so much for posting this video.

[@AutoEclinic]

Thank you! You can remove the intake with throttle body attached but you may want to remove the throttle body from the intake afterwards. This gives you a chance to clean the carbon build up. Also a new throttle body gasket may prevent a possible leak issue. The cylinder heads can remain assembled while unbolting them from the block. Although if there was any suspected head or head gasket problem its always best to have them checked for cracks and straightness.

[@AutoEclinic]

Thanks for the positive feedback. We are toying with offering manuals with each video. Thanks Michael and Aaron

[@LouieG7777]

Did I just see a DeWalt impact drill remove the harmonic balancer bolt?? :O

[@OleManGaming]

Hello I have a 2001 chevy blazer 4x4 LT can you tell me where the knock sensor is?

[@Alecgodi]

How many water cover got it?

[@Allen_basinger]

How long was actual breakdown?

[@velasquezchoche]

Can I replace my 2.8L with a 4.3L on my 1993 S10.

[@AutoEclinic]

Not on this 4.3. The head gasket replacement can be done in the vehicle on this particular 4.3. Thanks Michael.

[@LarryWebb-g5d]

What year did the 4.3 l v6 come out of ?

[@alberthofeldt2978]

Do you know of an expert mechanic in ct or no who can tune a gmc v6 487?

[@jonnyasprin]

I'm changing my head gaskets tomorrow,this video has been helpful,Tks. for your video posts.

[@stevewyatt3339]

home made thin copper head gaskets are the secret for over 15:1 compression

[@AutoEclinic]

Depends on the year, make, and model of the vehicle. Most head gasket applications can be done in vehical, although some must be done out of vehicle. Please let me know the year, make, and model. Thanks Michael and Aaron.

[@AutoEclinic]

No. The head gasket replacement can be done in vehicle. Thanks Michael and Aaron

[@AutoEclinic]

On a 4.3? I have never seen a tensioner on a 4.3 GM timing chain. Otherwise every GM 4.3 has alligment marks on the crank gear, cam gear, and balance shaft gear. I will have to have year, make, and model to give you specific details. Thanks Michael and Aaron.

[@jorgeandreshernandezmartin8967]

Buenas Noches de que año es este motor exactamente y en que carro venia gracias

[@macgyverporai7615]

Comprei uma blazer 4.3 que está com água no óleo e vou desmontar pra ver o que precisa fazer, já fiz de vários carros, mas desse motor não conheço muito. Conhece algum problema que causaria essa mistura, além da queima da junta.

[@Dr_Xyzt]

Can we get a look at those intake ports?

[@angelicareyes4418]

when turning down the rocker arms is there a torque spec?

[@guillermosurveys]

hi, i have a 262 in a mitsubishi panel is like a van, for cargo, and the engine oil pan is too close of the floor, about 5 inch. Can i cut to reduce the engine oil pan 1 inch up? and the arm of the oil pump too? And then instal a oil cooler to increasing of oil capacity lost? thank a lot.

[@bankruptonselling811]

do you know the name of oil sending unit pipe part that goes into the intake and you screw the oil sending unit into this pipe

[@buscandotesorosenlabasura713]

porque el anticongelante de mi gmc sierra 2001 se evapora y se comnsume muy rapido y no miro ninguna fuga alguien me podria ayudar por favor

[@paulofranco4259]

OLA! ESTOU PRECISANDO DE UMA AJUDA TENHO UMA BLAZER 4.3 6CC MOTOR VORTEC E RETIFIQUEI TODO ELE ..NA LENTA FUNCIONA NORMALMENTE ATE PARECE UM RELÓGIO DE TAO SILENCIOSO,MAS QUANDO ACELERO ELE AFLOXA OS BALANCEIROS DE VALVULAS E SAEM DO LUGAR O QUE DEVO FAZER NESSE CASO ALGUÉM PODE ME AJUDAR ....

[@cj7girl280]

I'm looking to put either a gm 4.3 v6 or 5.3 or 5.7 v8 in my 1976 cj7.. (years: 87-91 with vin z on eigth digit..) Any suggestions on the best, most economical and easiest swap of these 3? The jeep will mainly be a daily driver and used in seasonal snow.. No real off roading.. I also want to get the 700r4 auto transmission and retain my dana 20 t-case. Thanks for the video. :)

[@buddadragonmtg4848]

random question since i may have to do this myself soon. my 94 sonoma's motor is seized and im not sure what happened to it. was driving down the road and the check gauges light came on, had no oil pressure and before i could turn it off it died. it was as if someone was sitting next to me and turned the key off, no knocking, smoke, or any other typical sign of a nuked engine. Can anyone give me a clue as to what happened??? Seized crank bearing???

[@IgnacioEsponoBarron]

Como puedo conbertir un motor. 4.3omc aun motor normal para chebrolet 94

[@windardarwin5939]

nice looking i need new engine V-6 4.3 engine how much it cost ??

[@stevewyatt3339]

I have heard it is the same as the V8, is the front half the same, so similar brackets work for both?

[@elidames6889]

Almost everything is the exact same. Accessories, brackets, etc. Anything computer controlled may be different, but for the most part even that stuff is interchangeable

[@stevewyatt3339]

@@elidames6889 you can see the three engines, and I am wondering why the routing of the belt and idler are different at all, except to offer different products gmauthority.com/blog/wp-content/gallery/gm-4-3l-v6-ecotec3-lv3-engine/gm-4-3l-v6-ecotec3-lv3-engine-2.jpg gmauthority.com/blog/wp-content/gallery/gm-5-3l-v8-ecotec3-l83-engine/gm-5-3l-v8-ecotec3-l83-engine-3.jpg gmauthority.com/blog/wp-content/gallery/gm-6-2l-v8-ecotec3-l86-engine/gm-6-2l-v8-ecotec3-l86-engine-4.jpg

[@stevewyatt3339]

@@elidames6889 what appears to happen if you toggle the photos in a tab browser, you will notice the back motor mounts are same, so the engine is the same from the back-forwards, except for cylinders 3 and 6, so the front of the engine is different, it uses a longer bracket to make up for the missing cylinders, to make the engine the same overall length. (I do not really know reasons or rationale)

[@stevewyatt3339]

@@elidames6889 I proved a v8 ECM works

[@stevewyatt3339]

@@elidames6889 the brackets are longer, or THICKER in the Z plane, but use same holes for same reason, there are 3 idler setups for 4.3, 5.3, 6.2 and the 6.6 truck engine coming out

[@wandalllither2452]

What about timing set? lets say i need to replace valve lifters now, and install 260 cam shaft, do i have to do it at the same time or i can install shaft afterall? How i can hold the lifters in its places when i gonna change cam shaft?

[@Violative911]

Would a 262/4.3 Engine,4.3L Marine Reman Vortec Base Engine fit in a Chevy 1996 Blazer? thanks.

[@bryanhawk1442]

with a little help from an A-dapter kit

[@AutoEclinic]

According to Aaron all should work except for the cam, water pump, and maybe intake. He should know. This is his area of expertise. Thanks Michael and Aaron

[@richardallong5117]

need one as well. Found any, at what cost?

[@datto240z]

Vortec LU3?

[@eugenio6194]

Quiero saber cuantas libras de precio lleva los tornillos de las cámaras del motor vortec 6 cilindros que voy a cambiar las empacadoras gracias

[@WildrBill]

How do we know if crank is not 180 degrees out when setting chain on 2000 S10 4.3 Vortec

[@chazbarnes230]

Dot to Dot on chain alignment,will need to turn 180 when installing dist.

[@tomslick1650]

my head bolts are too tight? how can i remove them without snaping them? also, are they 166mm heads? because notheing else i have seems to fit, and i dont have a 16mm socket. thanks for your help

[@jackcarroll702]

Just apply constant pressure to tho bolt and slowly apply more and more they'll come lose

[@martinneps9387]

When you do a tuneup on a 4.3 do you have to do a reset on the computer please comment back very curious thank you very much

[@cameroncarter7302]

I never have but I do suggest that you check your oil pressure and check to make sure your motor is cycling oil well by removing your valve cover and letting your vehicle run for a minute to see if any oil is coming up. These motors are bad about losing oil pressure and messing up lifters and sometimes crankshaft bearings

[@kristopherhasenbuhler5393]

Tear down? I saw head removal!

[@richardchasteen9959]

I have water in my oil I no my exaust manifolds are craked so I should have water in cilinders but I don't is there a chance the block is ok 2 freeze plugs were oiut

[@dumpstergaming310]

"no'ing" is half the battle

[@ray1965ify]

richard chasteen if two freze plugs were pushed out the block could have cracked before freeze plugs poped out. this happned to me.

[@johnstontyler87]

what song is playing in the backround??

[@ProfessionalDad]

hows he move dat fast?!?

[@firebirdclub]

Nice vid. Could you please tell how to check the harmonic balancer for this engine? I'm asking, because on idle there's some small vibrations, when I push the gas pedal when in parking the vibrations get stronger. The strongest ones are ~1500-2000 RPM, then gets a little less when higher RPM. When cruising and when I try to floor it, the vibrations are very big. One friend told to check if torque converter is ok (i doubt it would be bad, because had a full tranny repair 1 month ago) and if harmonic balancer is ok, but don't know how to test it. Any help/info would be great. Thank you!

[@AutoEclinic]

firebirdclub Thanks for watching but unfortunately Michael passed away in March of this year and we are not able to answer questions at this time.

[@firebirdclub]

AutoEclinic Sorry to hear that! :( may he rest in peace!

[@ormonddude]

firebirdclub Look for a Dirty Plug it sounds like your dragging a cylinder

[@Sethorion99]

AutoEclinic Jeez, that's like the month after this video was uploaded. What the hell

[@Sethorion99]

Sethorion99 wait no, a year. Nevermind. On the plus side, he did a good job of tearing down that engine.

[@AutoEclinic]

How much does what cost? A new 4.3. a create 4.3 from GM, or for someone to rebuild yours? Thanks Michael and Aaron

[@laurishernandezhernandez1482]

como puedokitar carter 4.3

[@enriquegarcia3296]

AutoEclinic vortec 4.3

[@ricksanchez8468]

Where can I find the engine ground cable on this motor

[@jasonhumphry5836]

Driver side cylinder head to fire wall ground I'd recommend grounding the passenger side as well it's cheap insurance and will help the engine idle and run more smoothly and help prevent miss fire just my 2 cents peace and much respect Jason.GM only runs one ground strap off the cylinder head factory. performance people who know run 2

[@EGGINFOOLS]

Dig the vid. You should do a step by step with comments. That would be cool too.

[@richard2428]

Hey where is the knock sensor located really need help finding it

[@mikeknowlton6477]

Under the harmonic balancer, it’s one bolt I believe. (Bottom pulley)

[@12vLife]

what's a safe estimate to remove, rebuild and reinstall a 4.3L professionally? When you see a 4.3L with 250k miles what's the worst you can expect to eventually happen? The cost must be prohibitive when you see so many Astro vans in great shape at the junk yard.

[@supershark9k708]

The pcv valve keeps blowing out on my 98 chevy 1500 is my engine fucked ?

[@DustinBigMac]

supershark 9k Maybe the pcv isn't opening venting the gasses, and it builds up and pops it off? Just a guess

[@TRHOG]

supershark - are you getting lots of oil blow-by going on through there?

[@ray1965ify]

supershark9k your engine is building crankcase pressure i have seen oil pan gaskets blown out because of same problem.could be a big problem.

[@freakyflow]

great vid gives me a idea on my 2005 blazer motor .. Any idea what to look for that wear and tear quick IE head gaskets, bearings, fuel pumps just bought the truck.. I'm use to 80's 305 350's subbed and liked

[@jorgeandreshernandezmartin8967]

DE QUE CARRO ES ESTE MOTOR Y DE QUE QUE AÑO ES ????

[@AutoEclinic]

Jorge Andres Hernandez Martin Surgió de un noventa mediados chevrolet s-10 y es un 4.3 v6.

[@leonelmoreno5991]

Jorge Andres Hernandez Martin 2001

[@leonelmoreno5991]

Jorge Andres Hernandez Martin yimmy 2001

[@quickstopUK]

Thanks for the video - I have two quick questions. I am in the UK so can't ask anyone easily... Is there a tensioner on the chain as standard or is that the aftermarket fix for the rattle? Do you have a video or link to a how-to please? How do you align the balance shaft with the timing chain correctly please? Thanks!

[@RandomDude989]

This isn't a tear down.... A tear down is going to bare block.... pulling the crank/cam... even cam bearings.

[@AndieBlack13]

Seriously ? at 2:51 whacking the head & saying ...OOpps forgot those "other" headbolts... What became of loosening the head in "the pattern"? Kinda a non-issue I guess when you couldn't remember where are all the Headbolts are anyway.

[@AutoEclinic]

Yes, it is not a complete tear down.

[@eliudlopeztexas]

Nice, great video learn something new every day🙏

[@AutoEclinic]

Thanks

[@myfalconry76]

The one part I wanted to see you didn’t show, if you leave the cam and crank timing chain and gears intact it’s technically not a tear down it a partial tear down

[@tonyincs]

can anyone tell me if you can use any 4.3 block for a rebuildable short block? I have a 95 s10 with a Z code setup/TBI and need to rebuild another short block (mine is seized). Thanks

[@MichelLinschoten]

Stop....get a 350 small block...get it over with

[@TRHOG]

Just for my own edification, can you not use the block again if the sleeves are not galled, or replace the sleeves themselves? Would that be a cost effective way to do that? I'm transitioning from Toyota R&D off road race trucks & Supercross bikes. I have a 99 S-10 LS with only 145K miles on it. Everything is sound. I'd like to take it a couple notches higher in get-up & go. Just don't know where to start. Any tips for this Cretin (as I was so affectionately called above) would be greatly appreciated.

[@TRHOG]

Papa Mac - have you tried letting the pistons still in the cylinders soak in tranny fluid for a bit? I did that trick with my Father on his E Type Jag with a V-12 in it. Worked out great too when we finally got the pistons moving, we were able to blow the heads off by compression. That was a VERY educational rebuild!

[@fredmann8799]

Ha, I enjoyed watching the hyper-speed tear down. I wish I could move that fast, lol

[@mamz1404]

اللهم صل وسلم وبارك على عبدك ورسولك محمدﷺ

[@LowNSlowIII]

What year 4.3 is this?

[@AutoEclinic]

***** Mid 90's I think.

[@LowNSlowIII]

AutoEclinic awesome thanks

[@michaelbrumfield2422]

1999

[@thisisyourcaptainspeaking2259]

Not too concerned about bending push rods, it seems.

[@InsideOfMyOwnMind]

I have watched more than a dozen 4.3 "teardowns/rebuilds" and have yet to find one that covers the bottom end. I'm quite sure that if somebody posted a video that covered a proper 4.3 rebuild end to end the planet would implode.

[@Nathan-uo9yf]

Did you ever have any luck finding one? I’m on the search

[@InsideOfMyOwnMind]

@@Nathan-uo9yf Not yet.

[@charlescrockett6671]

What about disassembly of the heads, pulling the cam, rods, crank.......

[@edwardboyer7102]

Thank you great video

[@AutoEclinic]

Thanks for watching

[@ingomoosmuller7472]

Jose diaz talvez su carro presenta alto recalentamiento del motor por problema de radiador obstruido, thermostato pegado, fanclutch malo o tal vez una de las empacaduras de la camaras dañadas

[@joegoveia6499]

Forget a few bolts on the pass side head? 😂😂😂

[@axtra92]

Joe Goveia ....

[@broas26nicolas86]

seguramente se equivo ... yo quede con la duda no tendria que quitar la cabeza en orden inverso de aprete?? para no torcerla ???

[@markwilliams-el4me]

and your point is?

[@GILLEBRATH]

Tear down swiftly to groovey music.but learn nothing here.

[@seannolastfuqingname7308]

Changing out my intake gasket today; Showed me just how much I don't have to take off to really access it. Being in-body makes it seem so much more complicated than it actually all is.

[@macgyverporai7615]

I need to remove the engine to replace the head gasket.

[@kristopherhasenbuhler5393]

Lol I get it. It's a joke about how he made a video labled teardown when he simply removed the heads. He even left the pushrods in.. Haha But anyway I liked the video.

[@merstrand]

Remove the sparkplug wires before taking off the heads..

[@AutoEclinic]

You are right. Although i am no idiot. This was my first 4.3 tear down in some many years. I am sure you have done stupid things also. Unless you are God. If you are God, whats up God. How are you God. Thanks Michael and Aaron

[@yazanfarraj5499]

😆

[@rogeriorodriguez1212]

Thank you very much for making this video

[@labartino1]

Hola amigos excelente video. Me gustaria ver un video sobre el motor chevrolet 231 V6 de Malibu 1981. Saludos cordiales desde Venezuela !!

[@AutoEclinic]

javier pizarro Gracias por su atención! Desafortunadamente no producimos vídeos más porque Michael falleció en marzo de este año.

[@labartino1]

AutoEclinic Lo lamento mucho amigo por vuestro Michael .

[@richard2428]

I wish yall would've have more angles and better views for us DIY'ers good video tho

[@AndieBlack13]

This guy wouldn't make much money working at the shops I've worked at....walking back & forth to his toolbox to get "what you need". Set out your tools before-hand on the bench, neatly organized so you just reach for them, don't know what sizes you'll need? ...then your a newbie & deserve to take twice the time needed.

[@infamousparrott]

And exactly where are your videos of you breaking down an engine? Point proven. So shut tha fuck up! 👍

[@lanedavis594]

What a dumb ass

[@nitrosmurph21]

I literally have the most messy bay shit all over tools on the ground . Not that thats good really really bad habit . still im the fastest in my whole shop . Tho I do body work . So guess its just who he is prob better than your old ass .

[@fromthebackofmymind]

john murphy Funny boy Murphy! Remember it's us Old asses who control the world. At the corporate level of what will be produced and what your running your orbital DA over in the shop some [old ass owns]Reality check- When young engineers meet reality head on- The old asses, CEO and Board weigh the cost of production versus profit. Lots of amazing stuff could be built-and offered to the public-But old asses decide. Lets not forget the Military Commanders[more old asses]Ordering 25 year Sergeant Majors who in turn order young mouthy guys when, where, and how they will deploy. You have youth on your side and that's it. Us old asses have decades of experience to level up in covert control of the real world which you can't even imagine. Youth with intellect like an Alexander The Great are an anomaly to the norm and arrive like a bight but brief light once in a couple thousand years, boy. Keep on Bondo-ing.

[@AndieBlack13]

okay It's all OK, let them make those mistakes over & over ....it would appear they don't want to learn from others who are more experienced. An individual must learn in his or her own way, thru others or of their own making.

[@rayrayskip9779]

he's doing great

[@shakkey13]

I have to ask anybody else have lifter noise with the 4.3L V6 overall this is a solid engine pair it up with a solid cast iron transfer case good combo for a 4x4

[@Garret3579]

I had lifter noise on my 4.3 after i bought it with 123,000 miles. Used motor flush on it and replaced the oil pressure sensor after all the gunk clogged it. Never heard a lifter noise again after that. Also ran rislone additive for 3,000 miles and changed to full synthetic.

[@markproulx2765]

My 300k mile 98 4.3 do it a little

[@madmurdock2968]

There is a tool that saves you lots of time on this job. Go to ebay and search for: Fuel Line Removal Tool GM 4.3L and 5.7lL Isuzu 16mm Lower Intake Blazer Jimmy

[@thgytgjit2195]

What the hell, not going to move the camera to tell wtf is happening in the back?

[@kk-hp6ve]

oh stop u know how to take shit apart

[@jimmiebeesapimp]

This music rocks who is it? That's the important question!

[@AutoEclinic]

Thank you!

[@Chris-707]

I didn't see a power steering pump in the video. Is it relatively easy to remove?

[@Nathan-uo9yf]

@@Chris-707 I’d remove prior to pulling engine from the vehicle to keep from breaking the closed loop power steering system if possible.

[@JavierJimenez-hm1dl]

Saludos 👍😃

[@donbain8484]

Enjoyed video and cool music

[@RavenStorm702]

Dude's pretty fast. It would have taken me at least five minutes... Seriously, it showed me what I have to take off to get to my water pump. Not that bad. I just have to take off the front of my van to get to the front of the engine.

[@pablohenandez9101]

buen video

[@dangerdoberman]

I wanna tear my motor down now...just because. Much obliged >:0

[@stevewyatt3339]

COMPARISON PHOTOS of THE 3 GM ENGINES gmauthority.com/blog/wp-content/gallery/gm-4-3l-v6-ecotec3-lv3-engine/gm-4-3l-v6-ecotec3-lv3-engine-2.jpg gmauthority.com/blog/wp-content/gallery/gm-5-3l-v8-ecotec3-l83-engine/gm-5-3l-v8-ecotec3-l83-engine-3.jpg gmauthority.com/blog/wp-content/gallery/gm-6-2l-v8-ecotec3-l86-engine/gm-6-2l-v8-ecotec3-l86-engine-4.jpg

[@trayday2382]

That was not helpful

[@mercedesw2082]

Серьезный моторист🤣🤣🤣

[@donlawson7911]

W

[@TRHOG]

Good Lord!!!! I wouldn't let this man anywhere near one of my vehicles - you DON"T take a steel hammer to an aluminum head!!!! 2:51 Ok - maybe those are cast heads, hell - I can't see. I just don't think it's a good idea to take a hammer to your heads....

[@robertbuglio9796]

Henri de la Garrigue

[@TheExoticmoments]

Steel heads on v6 vortec

[@bladecppro26]

Henri de la Garrigue. the heads are steel-ass hat

[@MichelLinschoten]

the heads are steel, i think i will never let YOU near any of my vehicles.

[@TRHOG]

It doesn't matter if the heads are steel or not - there's no need to be a "hammer mechanic". If nothing else, let the compression blow them off. If you have to use a hammer - use a dead-blow. Who's to say you won't miss & hit a valve guide, break a stud...

[@rockyasteria2815]

what a waste of my time.. what about the bottom end?

[@brianmontero1593]

please put MUTE music before starting video. Terrible background music. great video otherwise, thank you for posting!

[@rochestermusic5858]

This suck really bad

[@MrWesleymoon]

This guy does not know what he is doing and the worse kind of mechanic one can find.

[@DurpandDurp]

Lol sloppy but I remember the first time I tore my first engine apart I can say it was sloppy as well hopefully this is his first

[@bobitwhite]

REALLY THIS be JOKE HA! ha!

[@SuperCyril2]

5.3 liter or nothing.

[@thomasgarrett6033]

327 ,5.3 liter vortec with a stage 3 software upgrade and my dc programmer.,,411 positive Trac rear end and hydraulic transmission with a shift kit and a column to floor transition with a 5 speed that shifts like a standard or automatic it's a Corvette transmission but not sure what I have a mod cam cold air intake with a blower I took out of a tower from an old desk top computer wired it and have a Google switch and an indicator light for when I need to hit the blower I also have a small oxygen tank drilled into the intake with a quarter inch hose that I release when my light for my fan comes on I only open it to a minimum psideoending if my fuel and fire is burning hot enough to accept the pure oxygen levels f not then I just hit the blower and I have a pint of his gh octane basically cheap jet fuel that is hooked up to a secondary fuel line so it mixes with the 93 octane I always run anyway just in case I need to get a few 100's of a second to get the win I got rid of the cat and went straight pipes three total one on each side that turns out before the rear wheel and the third is 4" tip turned down and I heated up with a torch sprayed it with water five or six times and I promise it sounds like a beast

[@ihavevigors4742]

Worst freaking engine ever. Pull it, scrap it, drop in an ls

[@Artchred]

I Have Vigors mine has been pretty solid, they are not as good as the 5.3 but hell you can get these for 200-300 bucks lol

[@thisisquist]

I Have Vigors lu3? The lu3 was possibly the best v6 chevy ever made