3400 GM Engine 3.4 Liter Motor Explanation And Discussion




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Coryhughes00: Im assuming intake manifold gasket. Getting air in the cooling system, losing coolant, over heating issues. Fluids do NOT mix though, so thats good. I bleed the air from the line every day or two and add some coolant until I can fix it right. Any recommendations on what types of gaskets to fix these with? My last 3400 blew THREE head gaskets. I heard there was a good set that lasts longer now. Any tips woul be great! Thanks

DJR5280: Do the 3.5 L chevy malibus have head gasket failure issues ? Mine is a 2005 and it seems like i have excess air in the cooling system. I never had a problem until i cracked the bleeder screw by the water pump and ever since it seems like i have excess pressure. I have drained the cooling system and bled it and no luck.

81kmoua: I have a 2002 Buick Rendezvou 3400 sfi engine, there is noise coming from the engine. When you turn on the car the noise comes on and when you step on the gas it gets louder almost like a whistling sound. I checked the power steering fluid and it was out and I filled it, same nosie . I replaced the water pump and still nothing changed. My friends told me that it could be the harmonic balancer is bad. But I don't know where it is located. I would like to know what the problem is. Please any advice would be great at this time.

mak69007: My 01 Chevy Venture, is Idling to high, speratickly, but becoming more constant. I'll shut it off, start it back up, and it will run fine for a bit. I'll be going, then if feels like someone is touching the gas. Please HELP

Randall Cooper: I have a 1999 Grand Am with a blown engine, 3400 v6. Bought a good engine from a wrecked 2000 Grand Prix and find out its from California and the emission controls wont hook up. Can I remove that and make it run?

sethhigby: i have a 200 pontiac grand am i recently had the upper radiator hose blow. i taped it up and filled it with fluid just to make it home about an hr away. 2 miles from home i pulled up to a stop light and the thermostat red lined i shut it down let it cool off then made it the rest of the way home. i changed the hose filled it up fired it up and fluid started leaking from the front of the engine. I thought it was the water pump. I replaced that but still seems to be leaking i can't track it down but it is dipping from the harmontic balancer. Any suggestions. thanks 

Sal Perez: Where is the cranshaft position sensor? Is there one or two

Edson Valdez: I have a 2002 Grand Am GT with the 3400 and it has hard time staring, I drive it around works fine but if I go to the store for about 30min to an hour than its hard to star again. I tried turning the ignition to run a few times before starting seems to help out just a bit, but it still has a hard time. Im thinking its the fuel pump. I also change the fuel filter and it was pretty clogged. Any tips? 

James Bessette: I have a 01 Chevy Monte carlo. My car always starts rough i gotta hold down gas for it to start. Also once its warm she likes to stall after i sit at a stop light or sign then turn a corner or something it stalls. I replaced fuel lines, idle motor, pcv valve, plugs and wires, and fuel filter. What could it be on the 3.4 sfi...

Matt Cogar: 2000 pontiac grand am gt. I've noticed when i get to about 1/4 tank of fuel the car won't start. If i rock the car back and forth while turning the key to the on position to engage the fuel pump it will tend to start. Inline fuel filter has been changed. Fuel pump screen clogged? HELP!!!

Keith c: you solved my idling problem ive had 4months god bless you.That was my problem.

MrHamp32: Hey man what s your thoughts on this? I recently changed blown head gasket on a 2001 chevy impala 3.4 I got everything put back in proper order per Haynes Man. Engine will spin but wont start. I have about 55-60 psi in fuel pressure. compressions good and I have spark at every cylinder. check again this morning to verify I have everything hooked up and tight and no luck. Any ideals?

david long: I'm completely lost. I have a 2000 grand am gt. I had the engine replaced and it ran fine. No problems until about a month later. Now it sometimes will either overheat or I will have heat inside the car and loose it and then I can shut it off let it sit for a couple mins and it'll be fine or it will just be fine to start. I put a new coolant bottle, new thermostat, and a water pump off the old engine that I know was good. Sometimes it will push coolant back out the bottle through the overflow or just air after I shut it off. The car runs good. It doesn't smoke. Starts easy. Everything. When it over heats or when I have heat and loose heat the radiator hoses are both soft when everything is fine they are both firm. Neither one feels to soft to where it should collapse. Help

Katie Jean: Ticking/clicking noise coming from engine, 3.4L 03 Alero. Happens when revving, when in neutral, and when idle in park. Thinking maybe a lifter? Not sure... Low oil pressure though. Any ideas? 

phil johnson: My 2002 grand am is idling very high around 1500-2000 I have checked the IAC, TPS, and any vacuum leaks and still can't find the problem any idea's?.....

Kaneshia Wagner: And how often should you change your Relays?

ProApathetic: I have an 02 Grand Am GT, and it'll hesitate to start sometime and when it happens some time it takes quite awhile for it to start, but it will run fine, also i doesnt feel like it has power i have a couple of friends with gt's and se's and they can get 0 - 60 in around a 7 - 9 sec range mine will get 11 

Jose Sanchez: My 2001 Alero hesitates when starting first i thought it was the fuel pump but it is working fine it runs fine it idled funnny once but not anymore, any help would be greatly apreciated

sethhigby: i meant 2000

Oaklandcoliseum: Worst engine ever .Starts Great first in the morning but once warmed up the engine shakes and fights it's self trying to restart after short or long ride . Has anyone solved the warm restart problem ?

laszlo tabor: Hello, I have a 2000 alero 3.4 v6..trying to replace camshaft sensor & in order to do this, I need to move power steering pump outta the way.. Removed the 3 bolts (through the pulley access holes) but can barely make it budge..only a few cm up.. Am I missing something? Do I have to remove the pulley in order to "lift" the pump? Thanks and good work!

pontiacaztek2: Vacationtime, thanks for the videos! Need your help.... my 1996 Olds Silhouette with the 3.4 liter engine.....well, the dealership told me that I need to have the crankshaft seal replaced. Any idea on how much this disaster is gonna run me? 

Rodney Turner: Pontaic 2001 grand am GT 3.4 liter motor if u know what the problem is please help and god bless

David Weesner: I have an 02 rendezvous. I currently have the heads off for gasket replacement. As you know, parts are everywhere in my garage. It ran fine before I took it apart, but im wondering if I should replace or have the valves checked as long as I have it off. I just bought the car and have no idea of the history. I am no expert on heads and think maybe I should take them to a shop and have them checked? Is this just asking for a large bill? I am pretty handy and usually go for DYI and I took it all apart no problem. I could do the valves with good advice. I am a machinist and have no problems following instructions. Thanks for your videos! Any thoughts on doing what is best at this time? Car has 233k so who knows

Albert Eble: 02 Buick Rendezvous. On occasion will start right up, grumble and then die after about one second. Then won't start, just cranks and cranks. If I let it sit 15 minutes or so and come back, then usually starts right up. Runs great once running, no stalls, hesitation or other issues. Problem only happens once in every 5 starts or so. Fuel pressure is good (58 psi). No leakage (gas, coolant, vacuum) in engine that I can see. Any advice what to look for next?

Antwaun Robinson: About how much motor oil do I put into a bone dry 3400 engine? 

G. Phillips: I am having a hard time locating parts on my GM 3400 sfi engine. I do not have diagram or manual. What is the specific name of the hose that is connected to the PCV? Also, what is the name of the hose that is connected on top of the air intake duct that is then connected on the back end of the rocker arm cover? That hose in particular has a plug on the end that needs to be replace so it can fit tightly in the cover. 

MissLLP: Where is the thermostat housed?

Fernando Warren: I have the 3400 in a Chevy venture and when I start it up in the morning it knocks pretty bad But once it warms up it goes away and runs fine, how can I fix this and why is it doing this?

Joshua Snyder: I have a 99 alero 3.4l. With ~162k miles. The car. died on my wife. I pulled CEL codes. Only P0300 multiple miss fires. All cylinders receiving spark. Will barely stay running for 1 minute. Sounds like2 cylinders missing. I did notice the oil pressure light is on. Any suggestions would be appreciated. I'm thinking oil pump.

copcarmehanic rick: (MECHANIC 37 YRS) i work at a used car lot, everyone of those i get i usally have to change thermostat, and int/ gaskets. sometiomes head gaskets. make sure if u do intake, use 'upgraded' felpro gaskets(metal) instead of plastic. its worth it.

fatback1980: Hello, thanks again for the great videos. They really helped me change my intake gaskets and head gasket. I now need to change the egr tube on my montana. So, do you figure I can reach the nut on the manifold to loosen the tube from below, or should I tilt the engine forward and get it from the top? Thanks!

Eric Yoface: I have a 02 grand am and i noticed if i'm in park and i rev the engine a bit, it goes from 1500 rpm then drops to 400 but it bounces to 1000 then goes to its normal idle at 700, any thoughts on what can be causing this issue? also idles in drive really rough like its almost bogging.

SAYCED: 2003 Buick Rendezvous leaking antifreeze behind engine block. Can't tell exactly where. Is there a hose I'm missing. Problem just started after new water pump was put on. 

meTimetraveler: the oil pump drive can leak oil, where you have to replace the "O" wring. Symptom oil on the ground. Pooled oil under the throttle body on the lower intake manifold.

Marcos Ramirez: Hi!! @ 2.35 can you tell me were that line goes, it get broken and I don't know were to look at thank you for your video 

Charles Mcpeek: It's losing power when accelerating.

mario villa: These engines are pice of crap no joke

Anthony Allender: I have no heat and on occasion my 2003 impala 3.4 will overheat (in the red) and then drop back down. Recently had intake manifold gaskets replaced, radiator and heater core flushed. Thermostat replaced also. Does this sound like a bad heater core, water pump or thermostat? I would really appreciate your help.

8goodlyfe1: Hello. The check engine light came on, scanned it, and received the codes P0108 and P0101. I proceeded to disconnect and clean the MAF and there was gasoline in the air intake duct, all over the maf, and the air filter. What could have caused this and how to fix it? thank you in advance for reading and responding.

Kaneshia Wagner: Where is the pcv valve located?

Ashton Cowling: I just bought a 2002 Malibu someone decided to put this engine in it. I am trying to find how old the engine is and the problems. Engine has a 99 etched on it I haven't seen any leaks

salim turkovic: Thanks for video, I found it very useable. Got some experiance fixing cars and just did lower manif gasket on my Aztek 3.4L.

Victor Valencia: MY car is a pontiac grand am gt and it started knocking after i start it and stays knock its not loud or anything and it still runs good but idk what the knock is caused by?!! need some help!!

Thakiid101: why cant a 100 yr old company seal an intake manifold correctly theyve had these issue forever

Deuce Seven: thoughts on the 3.4 in early f body camaros? degreasing these engines what should be covered pressure wash is a no no right?

Charles Mcpeek: I have a 2002 Grand am gt with 3.4l.I recently lost my heat and the car runs warmer than it it normally does.Also after this happend,when it gets warmer it seems like it p

Danny Storto: My 3400 is in a 01 grand am n just the other day it started to lose power while accelerating. Now it has NO power pasy 4000 rpms!!! Its not spark plugs wires or the mass air flow sensor. The only code that is going off is an oil pressure sensor. HELP!!!!!!!!!!!!!!!

big bubba: have this engine in my '04 Impala. Have over 175,500 miles on it.

John Paulson: Well I gave up on doing the work myself in fear of creating a bigger mess. So to the shop it went. A local shop who I very much trust looked at it and quoted me less than $700 for the intake gasket. Since I budgeted more than that I will have him check some other items while they are there. New thermostat and maybe some new coolant lines are in order. He said no labor on those since we would already be in deep. Fingers crossed the overall stays under a grand.
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3400 GM Engine 3.4 Liter Motor Explanation And Discussion