Dry start issue

[SnowDrifter]

Here's underhood. Little harder to hear past the standard mechanical noises, but that knocking/tapping/whatever when it first fires is audible - not an artifact of the camera

 

[OneofFew]

It is about impossible to diagnose anything by listening to a video. Use a stethoscope to pinpoint noises.

 

[SnowDrifter]

Not looking for a diagnosis. Looking for probable ideas of where to look or what to investigate. Or knowledge of any commonalities that may not be well known unless you've been around these rigs slot. You'll understand when I say this is difficult for me to poke and listen as I can only really look at it once every few days once it's sat. And even at that I'm a one man show. The act of turning the key means I can't be under the hood listening to stuff.

I know the starter idea was suggested but I'm not sure it's that. I've heard bad starters before and this doesn't sound or behave like any bad stater I've heard

 

[SnowDrifter]

Made it a little further. If I unplug the injector fuses and crank for 5 seconds, then plug it back in. No noise / no knock

Brainstorm with me:

Some sort of fuel knock (only on start after sitting)

Oil pressure related (sitting)

 

[SnowDrifter]

Possibly a failing oil pickup tube o-ring? Not really familiar with the oil systems on these to know if that's a possibility. Oil pressure while running appears normal

 

[SnowDrifter]

Oil pressure bypass valve for the filter rendering the filter's ADBV useless?

 

[SnowDrifter]

Lifter bleed down?

 

[afpj]

Listening via the Internet not that great for noise diagnosis, but all I heard was fuel injectors and a whine.

 

[CountryBoy19]

Oil pressure bypass valve for the filter rendering the filter's ADBV useless?

That one is easy to diagnose, $5 oil filter and a couple minutes of your time will tell you if it's filter related.

 

[SnowDrifter]

That one is easy to diagnose, $5 oil filter and a couple minutes of your time will tell you if it's filter related.

Sanity check: This the right part? I'm due for an oil change in 2 weeks. Will just add this in

https://www.amazon.com/ACDelco-1268...2&keywords=2005+tahoe+oil+filter+bypass+valve

Replacement appears pretty simple. Looks like the threaded bit the oil filter attaches to sandwiches that in. Remove that, remove the valve, install is reverse of removal?