FDrifting7

Injector seating...

I am trying to figure out if I correctly installed my injectors.

I have the KG parts kit, and i have seen damian's write-up... but i think i have different injector SLEEVES.

They (the sleeves) are all equal length, and have a beveled edge on 1 side.

Do i just set the sleeve down where the injector goes, with the beveled side up???

the injector o-ring fits nicely in the bevel for a good seal. But is it sealing good where the flat part of the sleeve is sitting??

And are the sleeves raising the injectors up to much for this???

I can take pics if my description is unclear! thanks.

pyro_racer_0016

the sleeves go on the bottom of the injectors before you put them on the motor. take the sleeve beveled side towards the injecto and slide it over the bottom of the injector with the o-ring still on. once it is fully seated you can install the injector. however you will either need to take out the fuel distributer in the engine block ore modify it now that you have new injectors. the fuel distributer is a small plastic ring with 2 prongs sticking off it into the intake track and then as an angled plate on the end of the prongs to direct the fuel towards the rotor. on the secondaries take them out completly on the primaries cut the angled plate off the bottom and leve the bars reinstall CAREFULLY so you don't break the bars off in the engine and istall the injectors on top. this makes the primaries easier to seal, however you will have to shim your primary fuel rail up slightly to keep the preesure even i used three thin washers between the block and the fuel rail mount for each bolt.

oo7arkman

iTrader: (2)

^^ that is good advice on using those injector sleeves. It is how I did it the first time around. It works just fine.

After battling another fuel problem while I was in there I decided on the primary injectors to use cjmotorsports o-ringed injector sleeves. They work great and are relatively cheap. No need to use the factory fuel distributer top to seal the injectors. No leaks and sealed air tight...

94touringFD

iTrader: (30)

Wish I knew about these 2 weeks ago.

FDrifting7

awesome... thanks for the good information!

I took the fuel diffusers completely out of the secondary ports... but left them in the primary holes.

I've heard of people leaving them in, and taking them out... any drawbacks to them being in there?? What do the angled bars on the primary diffusers do when left in??

and Yah, i also had to make 4 washers to go under and above the secondary rail mounts. The rail didnt sit quite low enough, and the stock bolts didnt tighten down enough to tighten it down. So spacers on top and bottom of where it mounted did the trick.

one more question... my secondary injector sleeves are sitting flush with my intake manifold... should they be pushed in more? or is this sufficient? because im not sure if alot of people had to put washers under the secondary rail to shim it up some.

thanks, karl

NewbernD

iTrader: (1)

Sorry to correct but these sleeves are meant for permanent installation. If you are not affixing them to the LIM then you are defeating the purpose. Remove the fuel atomizers, apply a thin film of RTV around the edge and slip them in, bevel up. Clean up with a q-tip or something similar. Let the RTV cure for a day. Install injectors with plenty of oil so as not to tear the o-ring.


They should fit flush or below the level of the LIM when fully seated. They should not chage the overall height of anything. The o-rings do not sit on the bevel.. the bevel is there to make it easier to insert. You should not need any washers.

FDrifting7

yah i found out how the sleeve goes completely over the injectors... I was a little confused until i bolted down the primary rail and pulled an injector back out.

The injectors are seated nicely, but the secondary rail didn't have any adjustments and it was just short of bolting to the motor. So i had to use some homemade aluminum washers. Unless these sleeves need to go deeper, im gonna keep it like that.

"Remove the fuel atomizers, apply a thin film of RTV around the edge and slip them in, bevel up."

Does that stay true for the primaries as well? because it looks like the sleeve wont fit tightly when the atomizers are removed.

FDrifting7

yah i found out how the sleeve goes completely over the injectors... I was a little confused until i bolted down the primary rail and pulled an injector back out.

The injectors are seated nicely, but the secondary rail didn't have any adjustments and it was just short of bolting to the motor. So i had to use some homemade aluminum washers. Unless these sleeves need to go deeper, im gonna keep it like that.

Does that stay true for the primaries as well? because it looks like the sleeve wont fit tightly when the atomizers are removed.

oo7arkman

iTrader: (2)

When you remove the primary atomizers you need to cut the lower portion off and only reuse the upper part. This will create a seal when you install the injector sleeve. This is needed b/c the injector goes though the sleeve and cannot seat properly b/c of the notch down in the primary injector hole. If you look at the atomizer the top seal portion has a notch in it that must be aligned properly when reinstalling it.

OR you can also do it how it was suggested by NewburnD. Though this also may still result in a vac leak due to the way the injector seats on that sleeve (it goes all the way through and cannot seal on anything). Some have gotten everything to seal up this way and some have not. I am not sure why.. He is most definately correct on placing the secondary injector sleeves. Those need to fit tight enough (or seal with RTV) to create an air-tight seal. Otherwise you are going to have a vac leak.

This is why I eventually went with the cjmotorsport injector sleeves on my primaries. I had a difficult time getting them to seal up after some other work I had done elsewhere. No RTV needed, just lube the orings and seat.. insert injectors.. done..

NewbernD

iTrader: (1)

They should fit relatively close but will still require some sealant.

The idea here is that when you put the sleeve in the factory injector bore, there is a little shelf that remains just below the sleeve. This shelf is enough to support the injector and not let it slip through. You seal the sleeve to the LIM/iron with sealant and the injector o-ring seals to the sleeve. I'm not sure how anyone could have a leak with this oo7arkman.. so long as you install the sleeves first, there is no way for it to leak.