Installing the Injectors
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Installing the Injectors
I just recieved my injectors today. Is there anything special I need to do before installing them, or to do after installation but before putting the valve cover back. I think I remember someone saying fill them with oil first. But I'm not real sure, I may have just dreamed it lol. Anyways, thanks guys for the help.
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I know I'm posting alot. But I just want to make sure this is done right. I have the injectors in, but not torqued. I'm having a problem plugging them into the harness. It doesn't seem like they wanna plug in. I see the small numbers and they corrospond to each other the way I'm plugging them together. Try just won't go in all te way.
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Joined: Apr 2005
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From: Anchorage, Alaska
The injector hold down bolts screw into the cast iron cylinder head, not the aluminum rocker box like the oil rail does. They are pretty forgiving. When I tighten them, what I look "feel" for is for the injector to bottom out, then with some more torque, the copper combustion seal to crush. Then a little bit more after that. They bottom out solidly and you can feel the bolt stop and not want to tighten anymore. It's only an 8mm X 1.25 bolt, so not too tight.
Check your case-to-head tube o-rings (whatever came apart when you pulled the oil rail, whether is be at the rail, down by the branch tube, or both joints) just to make sure they aren't damaged. I don't know if you were recommended to replace or not during injector replacement. The factory does, but I have reused so many times, I don't believe it unless the o-ring is questionable or damaged.
The metal locking clip in the plug faces towards the outside of the engine. The gold numbers in the plug of the injector itself (where it snaps into the rocker box) face up. Make sure the injector plug snaps into the rocker box, then plug in the injector before installing the rail, and anything else. If you "thought" you snapped it in, but it didn't, you'll push the injector plug back into the engine when plugging it in.
Check your case-to-head tube o-rings (whatever came apart when you pulled the oil rail, whether is be at the rail, down by the branch tube, or both joints) just to make sure they aren't damaged. I don't know if you were recommended to replace or not during injector replacement. The factory does, but I have reused so many times, I don't believe it unless the o-ring is questionable or damaged.
The metal locking clip in the plug faces towards the outside of the engine. The gold numbers in the plug of the injector itself (where it snaps into the rocker box) face up. Make sure the injector plug snaps into the rocker box, then plug in the injector before installing the rail, and anything else. If you "thought" you snapped it in, but it didn't, you'll push the injector plug back into the engine when plugging it in.
Lead Driver
Joined: Jun 2007
Posts: 6,757
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From: Corvallis, OR
Injector torque for your year is 26 ft-lbs, most recommend 28 ft-lbs. Oil rail bolts on my '03 are 8 ft-lbs (96 in-lbs), probably different on yours since the oil rails changed. Oil the tops of the injectors before installing the oil rail to keep it from tearing the top o-ring during installation. Also, oil the injectors really well before installing them to protect their o-rings. I used clean engine oil, some soak the injectors in clean ATF before installation.
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37nm is 50ft lbs. that seems real high for a 8mm bolt.your torque wrench should go well over 20nm if its a 1/2 inch wrench.20nm is only 27ft lbs.if it were me i'd look into the tech folder for torque specs, and if i couldnt find it there id go no more than 25ft lbs on them.maybe i'm wrong but you sure don't want to be breaking those bolts.
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Yea. I am even trying to plug it in without going through the head. Just straight plug in and it won't. There is a little slit in the injector plug. That's the hole for the keeper ring. When u put them together, the pin should slide through th harness and catch the slit in te plug. Looking at it closly, it looks like it needs to go down the thickness of the Keeper pin to be able to hold them together. What on earth could it be? I mean I've tried really hard to connect them. It just won't go any farther.
