So I'm going to replace X-over tube o-rings and I have conflicting info, Book says torque injectors install tubes torque injector lines, I have read on this forum leave injectors loose (snug but not torqued), install tubes, torque lines, then torque injectors? Is one method better than the other? I understand reasoning, to help center tube on injector. Is the book overly confident that one could put the injector in the proper position the first time? I want to hear from people that have done it. Thanks

If you haven't loosened the injectors I wouldn't worry about loosening them to install the tubes. They should already be centered.

 

When I do mine: Install injectors (leave hold down loose) install tubes, install injection lines and torque, then loosen lines and torque injector hold down. Re tighten lines and you're good to go.

If you don't loosen the lines before torqing the hold down the injector could sit a tad crooked in the bore and not seal on the bottom surface.

follow procedures as stated above 

the hold down caps are slotted so it self aligned injector with crossover tube UNLESS you are totally 180 degrees off, and you would really have to have your head in your___ to do that

I did my tube O-rings without loosening the injectors. No issues.

yeah you shouldnt have to touch the injector hold downs at all. loosen the lines and remove them out the way then with a small flatblade screw driver gently pry them out of the holes and you are good

Thank you all for the info, I might have to do injector o-rings but not sure, I'm going to do tubes first, head is wet on #4 & #6  injector, I think that's the only problem.

before you touch anything near the fuel lines pressure wash that area of the head then blow it clean or just blow it clean. dont want gunk getting in there.

Already done, not my first rodeo. Thanks

It only when installing injectors you want to tighten the connector tube first to center the cross over tube. But being the the tubes are sealed and centered there is no need to mess with the injectors.

IF INJECTOR o-rings were bad i believe you would be seeing signs of Fuel in Motor oil on dipstick

Correct... The injector o-ring does exactly that where the crossover o-ring prevents fuel leaks on the manifold.

All the parts finally got here, doing it this weekend. I'll post when I get done. I did get injector o-rings just in case, I'm going to pull valve cover just to look and set (check) valves while I'm there.

So its been 4 days since o-ring and tube replacement, took 4 hrs to do everything. Truck has started every time on about 1 rotation, which is normal operations, and I don't see or smell fuel anymore. So I conclude success!

Thanks for all your input.

Good deal  . Glad you got it fixed up.

Mike,

 

Can you verify the process for reinstalling the cross over tubes?  I want to edit the article to reflect that as there is nothing specific in regards to that.  

 

 

Is it install injectors, install cross over, tighten cross over, tighten injector hold down?

I loosen the crossover before torqing the hold down. Otherwise the injector could sit crooked.

Mike,

Can you verify the process for reinstalling the cross over tubes? I want to edit the article to reflect that as there is nothing specific in regards to that.

Is it install injectors, install cross over, tighten cross over, tighten injector hold down?

Make sure you also loosen the blue lock bars on the injector lines, this way they will match up.

But I snug the lines tighten the injectors, then go back and retighten the lines on the cross over tubes.

This is a very delicate process and should be taken more serious than I did when I replaced my injectors. I found out the hard way.