GM 3.6 LFX Fuel Rail Installation, How To Install!

if you ever done these you probably fought with the rail and just luckily were able to get the rails removed/installed. i took the time to figure it out and the trick to getting them in. the video is about 10 mins close to real time installation and recording. i hope this video helps out anyone else having to remove an injector or rail on a GM 3.6 LFX engine

[@katzenpapa]

I did this procedure on my GM 3.6 LLT, and boy let me tell you... there was a LOT of swearing going on. When fuel rail comes out you don't realized what you did to get it out, but at that point its just pure elation!

[@NutsandBoltswithTone]

Great video Davion. I really feel like I would be better suited to install the fuel rail after watching your video. Thank you for the install tip.

[@Itsdazeni]

Thanks man, they’re definitely a pain. I had a really hard time removing them. So in install I wanted to figure it out I had a couple Chevy techs just say yeah they suck lol or didn’t remember.

[@NutsandBoltswithTone]

@@Itsdazeni I've only seen it removed once and it was on a head job and body was removed

[@oriontheking5724]

Man thank you so much, I watched so many mf videos this the only one that really helped me get it done

[@Itsdazeni]

Awesome! Glad it helped

[@verohandymike]

Hopefully this comment will help someone - My 2012 Cadillac SRX (has this same engine) started leaking gas. I looked and saw that it was coming from the injector area. So I bought a set of injectors, not genuine ones, and went through the process of replacing them. Seems it took me about 2 hours to get the rails in and out this first time, but by the end of my story I was getting it in and out in minutes, they do not make it easy. I went on one test drive with the new injectors and by the time I came back it was pouring out gas onto the driveway. When I took it apart I saw that the gas pressure had blown apart a few of the o-rings on the injectors and spraying the gas past them onto the engine. I figured this happened because I was being cheap and didn't get the OEM injectors. So I ordered an OEM set and went through the process again. When I got done the car was missing a lot and throw codes about low fuel pressure, so I replaced the fuel pump (6-8 hours labor). After one single test drive even more gas was leaking out from the fuel rail area again! So it gets taken apart again. What I did notice each time is that the gas pressure had blown apart one or more o-rings on the injectors and spraying gas past them onto the engine, lucky I did not have a fire. I determined that the fuel rails themselves were worn (not very common), so I replaced the fuel rails. Of course this meant buying yet another set of injectors, I was not gonna try to reuse any that came out of it, so I have a box full on injectors with about 2 miles on them. This fixed the issue. So I guess what I am saying is that if there is a gas leak from the injectors, examine the ones you remove and if the o-rings appear disfigured or torn, it may possibly be the rails need to be replaced.

[@shawnkelley9007]

Yeah I've checked into it and I'll have the entire rails out so I'll have the person asking for the favor to get the tool and New seal's along with the new gaskets ETC. Hopefully the tool and everything I'll need my place will have what I'll need. Good looking bro

[@MiguelMartinez-np8uo]

Great video and thanks for posting , i wish I had seen it earlier . i wasted about 4 hours taking the injectors out and trying to put them back in . what a pain. not done yet with the job but thanks to you i can do it the next time I go back to the car. :]

[@Itsdazeni]

Glad I was able to help you out man!! For the future lol

[@MiguelMartinez-np8uo]

Okay so I tried to do it today but I wasn’t able , the car I’m working on is 2009 Chevy traverse 3.6 . I don’t see the little cuts for the injectors like yours .

[@Itsdazeni]

Realy?

[@ISILENTNINJAI]

This is one of those times that you curse the engineer who designed this. 😂😂 been fighting this for more than an hour.

[@seanhoward8025]

Did you look at the factory repair instructions? “Remove head assembly”. That’s right…about $1,200 labor just to access the fuel rails…PLUS the labor to remove the rails, injectors, etc.

[@AZTombstone792]

Thanks for this video!! Your info and video are going to help me install my injectors. I got them out but had no idea how I was going to get them back in. Thanks!

[@Itsdazeni]

Glad I could help!!!

[@Itsdazeni]

Idk if I mentioned in video you will have to get a o ring sizer to install the new print on the injectors

[@AZTombstone792]

@@Itsdazeni I got them installed. Pretty straightforward once I watched your video. I did install new injector seals with the $45 tool from Amazon. On my 2012 Buick Enclave, I first installed the back (passenger side) injectors with the fuel rails and tightened down the bolts, but had to remove the fuel rails to get the front injectors in (leaving the back injectors in). Then, after removing the bolts on the back rail and removing it, I installed the front injectors without the fuel rail. The rest is kind of a blur, but somehow I put in the fuel rails. I had to install the front fuel rail all the way, then loosen up the back so I could lift it out a little bit so I could get the fuel pressure sensor installed with the fuel pressure socket I had. Then I tightened everything down. The car fired up after a few tries and now "seems" to run more smooth but I can definitely feel more power. Thanks again.

[@Itsdazeni]

@@AZTombstone792 hell yeah man glad you got it!!!

[@shawnkelley9007]

Good video brother. I've been working on cars since 1992 I've been out of the game for 6 years now. Went back to welding. But I got a lot from your video, very professional good work and thank you. Do you really need the tool for seal installation?

[@Itsdazeni]

I’d highly recommend it unless you’re getting new injectors then they already have the seals The tool is like $30 on amazon

[@BLAKEDILLONRACINGDEVELOPMENT]

We've used an old school trick also, vaseline on the seals, if it's hard get the rail down

[@Itsdazeni]

I always put lube

[@rigopena2794]

Vi muchos videos pero este Es el mejor de todos.

[@mariolewin7137]

Thank you for the video! I have a 2011 camaro 3.6. Can't get the P/side rail to clear the D/side cylinder head. Appears to be the same setup that you are working on. I have tried prying the rail to the back. Any help would be greatly appreciated. Identifix is saying to pull the cylinder head

[@Demop_VW_garage]

dude your a legend :)

[@lizbethaguilus2870]

Very helpful

[@seanhoward8025]

So…if you have an older model, like a 2010, without the slots…are you just screwed?

[@mechanicalmanny494]

The slots are cut to fit the injectors after they realized they fucked up

[@seanhoward8025]

So…if you have the older model, like a 2010, without the slots…are you just screwed?

[@waynem.6372]

trying to get mine back in, just wont go, rail just doesnt seem to twist enough to get that middle one in, it just drops into that cutout at the bottom easy enough but no matter how much leverage i put on that middle injector it wont move across to the hole. what am i doing wrong here? 3 hours and im getting tot he point of angle grinding part of the inlet runner off

[@zaytyga]

Did you put the rear bank in first or the front bank

[@Itsdazeni]

Not to sure what you mean but you have to put what would be the right side(if standing behind engine) first

[@AZTombstone792]

On the Acadia, the back of the engine is connected to the transmission.

[@ISILENTNINJAI]

What torque spec did you use?? I keep having random o rings leaking on me. I got my rails pretty tight but im thinking i might be piching them from over tighting ?

[@ISILENTNINJAI]

Nevermind i just saw you showed 18ft lbs. I defenitely overtightened. Do you think i pinched the injectors?

[@verohandymike]

If you have o-rings that keep leaking, then it is the fuel rails that need to be replaced.

[@Grrdx1989]

Torque?

[@TurboTyTy]

Interesting, what model is this engine in?

[@Itsdazeni]

Was in a 2012 Camaro I did an engine on

[@916Sick]

Did you reuse the seals?

[@Itsdazeni]

Absolutely NOT, need new seals and a special tool to resize the seals I had to buy one for a kit on Amazon for $80

[@916Sick]

@@Itsdazeni much cheaper than the last time I looked one up. Our local dealer does it for us when we order the parts from them but both our Ford and gm dealer are super cool with us.

[@Itsdazeni]

They size your injectors?

[@916Sick]

@@Itsdazeni yup

[@SeanPennII]

Can you link the kit?

[@propphotographyaz9992]

These things do suck to install, classic gm fucking it up at every turn. Like I've said a hundred times, after being a tech for 20+ years, you couldn't pay me to drive a gm anything. They are the worst built cars on the world, absolutely no thinking went into the creation of gm vehicles, it's purely about money and nothing else.

[@03mm24]

I totally agree....with the exception of V8 Camaros and Corvettes those are actually pretty easy to work on and don't break down nearly as often as the 6 and 4 cylinder trash