3400 GM Engine 3.4 Liter Motor Explanation And Discussion




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

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!!!

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?

Niko Gauna: I have an 02aztek and the coolant hoses are always hard, we have done the water pump and the temp levels seemed more stable, we did the thermostat next because the levels started going crazy inline somewhere sat for a long time, or when I had it idling for a long time, 30 mins or more it would climb, never in the red,... but still to high for my liking. It does hesitate a little bit when u start it sometimes, other Times the remote start goes off but don't start the car. 134, 000 on her

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?

mario villa: These engines are pice of crap no joke

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 

Kaneshia Wagner: Where is the pcv valve located?

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.

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.

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!!

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?

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.

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 ?

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!

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

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

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.

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.

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

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

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...

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? 

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

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!

Charles Mcpeek: It's losing power when accelerating.

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

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? 

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.

oscar contreras: I have a 2004 impala and I recently discovered a bad leak under a metal hose that runs under the 3400 upper intake manifold. It lets off a hissing sound which I believe is an obvious sign of pressure leak from a metal pipe. I was wondering if it was absolutely necessary to remove the intake manifold or if it could just be disconnected and pulled off another way. 

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.

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!!!!!!!!!!!!!!!

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

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?

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

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.

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. 

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

clwilu94: Someone please help. I have a 2000 grand am with this motor. Cant figure out why it starts up but will not stay running unless i rev it . When it gets below 500 rpms it dies. Any ideas would be appreciated.

Vacationtime247: You will need an OBD II scan gauge to pull up the codes. Any autozone or parts store will run the codes for free. The pinging could be bad gas or the elevation. Possibly the EGR system. The EGR system tends to get carboned up. Change the EGR and clean the port with a coat hanger and strong solvent. Also check for vacuum leaks with a water bottle or carb cleaner. Be sure to check your oil too, make sure there isn't water in with the oil indicating a bad intake manifold. Hope this helps. VT247

Elante Ford: O what might you know about the gmc Jimmy. Cause i think I need some new battery cables any imfo on a quick fix with that please and thank you

Vacationtime247: Loosen all the 4 bolts holding on the pulley. Take off the serpentine belt. Take out the 6-8 bolts holding on the water pump marking the mounting location (makes re-installing the new one easier). Scrape away all the excess gasket material on the mounting surface. Coat both sides of the gasket with RTV black silicone. Install new water pump, install pulley, install serpentine belt, fill radiator and overflow up with coolant. VT247

John Paulson: I'm back. My '01 Alero has 135k and seems to have an intake leak. It idles with a very slight roughness and has a slight hesitation with slight acceleration. A little more throttle cleans it up. Temperature wise the car runs a little above mid-range but approaches 3/4 when in traffic. When I shut is off I hear a hiss for a couple seconds and it sounds like it originates from the intake bolt where coolant seeps from. Compression is in the 140's on all 6 cylinders, so thinking intake. More to come

Mike Thexton: I did watch that video before, I forgot about it though. I remember watching that video and thinking to myself, wow that's gonna happen to me, I just know it. I'll check that out thanks.

CS Bens: 2000 Pontiac Grand Am w/ same engine is often stopping after 15 minutes of driving. Wait 3 to 10 minutes it starts up and goes a while longer. When it first happened it would go almost exactly two hours and stop. Would wait 20 minutes, make it to the 1st gas station, fill up and it was good. Now it happens after 15 minutes and with full tank. Any thoughts? Mechanic was mystified.

Tyrone Cox: I have a 2002 Grand AM with a 3400 in it. My oil pressure like keeps coming on. I have been trying to find out where the oil pressure sending unit is located, but cant find it If you know can you tell me where it is located so the I can replace it. I'll appreciate your help.

Vacationtime247: Check the fuses and check for electrical wiring going to the starter. Perhaps the + lead for the starter relay isn't tight. VT247
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3400 GM Engine 3.4 Liter Motor Explanation And Discussion