When I installed my injectors I torqued them to 130 inch pounds. Well it has been a few thousand miles most of which was towing a 5th wheel and I decided to pull the valve covers and check the torque.
Most of the right bank, with the exception of 1 injector, were all just over 100 inch pounds. The left bank were mostly in the low 90s so considerably looser.

Re-torqued them all to 130 inch pounds. Was going to do the hot re-torque but the forecast has a lot of rain and snow so I need to get this truck up and running quickly.
After Christmas I will finish reassembly and report on whether this quieted my truck down significantly.

Merry Christmas to y'all!

 

Looking forward to hearing from you on whether it made a difference or not!

 

Before you took the valve covers off again did you notice they had gotten louder?

 

Yes, the truck under load began a faint tapping kind of like when a sewing machine is running.

 

Just more proof that this is a real issue that should be addressed. Nicely done!

 

Good stuff! I'm going to have a look under my VCs for all the usual suspects here soon and hope to improve multiple aspects of my truck at once including this one!

 

My wife and I recently traveled cross country in our Subaru. We had the opportunity to meet @Wesley Green and his great 7.3L truck. As soon as he started to turn into the parking lot and then into the space I asked my wife "is his engine quieter than mine?" She agreed it was and the only thing Wesley and I could come up with was that he hot torqued his injectors recently.

I have not touched the injectors since buying the truck 6 years ago and can only assume the injectors are now 20 years and 1 month old. The truck runs great, but is certainly louder in the "sewing machine" category than Wesley's truck.

A year or so ago I met with @akcooper9 and I did not notice a difference between his truck and mine, but I cannot remember for sure and don't remember if he has re-torqued his injectors either.

I will be meeting up with @SkySkiJason very soon and am interested to see and/or hear any of the trucks he may have at the time. I have only been in the presence of single shots once or twice and never hybrid injectors. Should be a good trip that will allow me to learn some maintenance and catch up with a friend I haven't seen in a while.

In my opinion there is some validity to hot torque procedures, this has been proven time and time again. Although when I had the valve covers off a year ago during the SXE install, I didn't mess with the working injectors or their hold down bolts.

 

I considered the hot torque method but thought this time around that a standard re-torque would be the best option. No doubt I will be back under the hood sometime in the future as my 42 pin connector no longer bolts together. I have it held tight by a zip tie at present.
Shade tree mechanic lies deep in my background. LOL

 

Yo,Sous!
When you will be meeting me..?

 

It's actually been a few years since i was under the valve covers Sous. Not what I'd call recent.

 

Well sir, I did quite a bit of flying across the pond for many years and now am planted firmly in the USA.

I stand corrected! Wesley, do you recall the torque spec you used and roughly when the procedure was performed?

 

I saved his write up.

 

Some trucks are just louder than others. Never really understood why....

I have never re-torqued or hot torqued an injector. I’ve probably installed (30) sets of injectors. None of those have ever become loose.

I’ve always suspected that the injector torque problem some people experience is because people put too much faith in the torque wrench.

 

probably not too many ever send their torque wrenches in for calibration either.

 

Would have been August of 2017