2013 Escalade ESV DOD full delete becoming rebuild

[West 1]

Reading your notes above you mention tighening the rocker arms to a certain preload? They need to be tightened to a certain torque? I would have to go look it up but I bet it is 35-45 lbs?

They don’t adjust at all, you just tighen them up and torque them to spec?

 

[donjetman]

Reading your notes above you mention tighening the rocker arms to a certain preload? They need to be tightened to a certain torque? I would have to go look it up but I bet it is 35-45 lbs?

They don’t adjust at all, you just tighen them up and torque them to spec?

Rocker arms get torqued to 22 ft/Lbs period
preload is set with pushrod length

use the search feature here with the word "Preload" and my user name, I've explained this many times.

 

[West 1]

I understand preload puts the lifters in the correct position to survive with no noise or hanging valves open.

In this case he fired it up and had a quiet engine for over a couple hours run time? That would indicate his preload/liter adjustment was in range for the lifters and not the cause of his loud rattle which sounds more lower end?

 

[Joseph Garcia]

I agree. However, my measured preload of approximately 0.145" is out of the recommended spec for the Delphi LS7 lifters. I am going to fix that.

There was no miss of any kind. Engine ran quite smoothly.


Understood. For the moment, I am cranking it over by hand. The starter is off the engine. So far, all rockers have depressed all the valves the same amount. None of them feel loose in the fore and aft direction. Only side to side when the lifter on the base circle of the lobe.

I am an Industrial Maintenance technician by profession, and have been a gearhead for a few decades. I have learned the hard way that equipment does not 'heal'.


I verified the holes in the cam bearings were lined up with the holes in the cam tunnel. To the point I was able to squirt oil from the main cap saddles down to the cam bearings with the engine upside down on my engine stand.


Honestly, that makes sense. I will just have to live with slightly lower oil pressure at hot idle. I have/will run Mobil 1 Synthetic 5W-30 on 4000 mile oil change intervals. It should be OK.


Thanks!

I recommend that you completely move on from oil pressure changes and concerns. Your idle hot oil pressure is just fine. Even with a brand new Melling oil pump, their literature in the box advises you that regardless of the pressure spring used, idle hot oil pressure will be around 25 psi.