I have adjusted the valves thinking that was the noise . Then I put some injector cleaner in,but it still rattles.It gets great mileage and has plenty of power .Are they just worn ? Any help would be great



--------------------------------------------------------------------------white reg cab 2003 ,3500 ,no mods,5spd,3.73 posi

 

There have been some cases of the injectors not being torqued down to specks in the '03's. Can cause that type of noise.

 

Thanks I'll give that a shot.

 

Just posted a thread on my injector problem.
I'm digging in my manual on torquing the injectors now.
I'll give anything a try at this point!
IC

 

Is it the 2 hold down bolts that are not torqued properly? Service manual states these are to be torqued to 89in. lbs.
does anyone know if these are the bolts that need to be torqued?
Ty
IC

 

Mine does the same thing i just turn the radio up


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I Like to hear the sound of the turbo! The injector noise interupts it.
I do turn up the radio at times when I can stand it no more!
IC

 

Mines most noticeable when cold and im not even sure its the injectors it really wasnt a concern enough to me to warrant tearing apart the truck.


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Thanks guys for the replys! Work called and I have to go. Will check post when I get in.
Ty (Thank You)
IC

 

Please excuse the long post. Thought the detail would give the do it yourselfers a good idea of what your getting yourself into if your going to torque the injector bolts.
Last night I found the time to tighten the injector mounting bolts after obtaining a (in. lbs.) torque wrench. This ended up not being for the faint of heart as the exhaust rockers had to be removed in order to torque the injector bolts to 89in. lbs. I found the rocker arm bolts to break loose at 15 - 16ft. lbs. Service manual states these need to be 27ft. lbs.
First round was removing the exhaust rockers in the same order as you would run the valves and torque the injector bolts 89in. lbs. Then torque the rocker arms 27ft.lbs. ensuring as I did that the crosshead was installed the correct direction. (There were 5ea injector bolts that were not at the correct torque)
From the factory the intake crossheads dimple or mark was on the valve closest to the intake side of the engine and the exhaust crossheads dimple or mark was on the valve closest to the exhaust side of the engine. I did not find reference to these marks in the service manual but thought it significant enough to reinstall in the same manor as the factory installed them. The exhaust crossheads were not intentionally removed but were relocated by oil film strength when removing the rocker arms
So the second round was torquing all of the rocker arm bolts in the same manor, as you would adjust the valves. All were less than 27ft. lbs.!
Third round was running the valves. All valves were at or over there max lash limits, prior to removing the rockers. The end lash settings were set at .009 intake and .017 exhaust.
For a grand total of 6ea 360-degree revolutions of the engine after finding TDC at 12:00 and #1 cyl intake and exhaust rockers loose.
All said and done a couple of hours. Did it help? Well the engine is quieter and sounds better but the injector noise is still there.
If nothing else the valves needed to be ran. I thought the lash was way loose for they’re being less than 50,000mi on the truck and eliminating a potential cause for the injector noise.
Would I do it again in hind site? Absolutely! It was worth it just to attempt to correct the months of frustration that have built up.
Again sorry for the long post, thought it might help someone’s decision on weather or not to attempt this. I will dup this into another thread that this is related to.
TY (Thank You)
IC