Pickup tube question on 2007 GMC Yukon Denali 6.2

[donjetman]

This summer I'm gonna change my VLOM cover & gasket, install a new harmonic balancer pulley, bolt, and seal. Timing cover gasket too.

I did the oil pan and rear main cover & seal 5 + yrs ago, and all is well still.

 

[Charles Hughes]

Well I took my time and redid the valley pan cover, gaskets and cleaned everything. Oil pressure is reaching higher now into the 40-45psi range on startup but still drops considerably too low after warm so I will tackle the oil pump next week. I was hoping to get to it today but that won't happen. The oil pump has multiple gaskets that came with it for the pickup tube as well and someone had mentioned that GMC used different pickup tubes in 2007 when they were switching to 2008 era. Not sure if it's true or not but I do have 4 gaskets now to choose from but I will probably stick with the 24701 red felpro.

I have to do some further inspecting of the Denali but the oil leak seems to be only when the truck is running so I'm thinking a rear main seal is thee culprit on that. Not sure though. I am half tempted to have my local shop do it only because I don't have a lift and being on my back that long doesn't seem fun. We will see.

 

[Charles Hughes]

Here is a question for everyone. I looked at the cam right before reassembly and I'm noticing some marks. Wondering if I should replace this cam? Should I consider like a stage 2/3 kit?

 

[j91z28d1]

any chance you'd done the add 2 qt and park down hill thing to see if the oil pressure goes up?

 

[j91z28d1]

Here is a question for everyone. I looked at the cam right before reassembly and I'm noticing some marks. Wondering if I should replace this cam? Should I consider like a stage 2/3 kit?

others will chime in, but yeah. that rough Grey part is concerning.

just for comparison sake, I took almost the same Pic of mine when I did the vlom mods. that's at 140 ish. notice the lack of rough band yours have

 

[Charles Hughes]

Well I will make a party of it and order a new cam when I do the oil pump. Now I just have to decide if I should do a stage 2/3 upgrade.

 

[Charles Hughes]

any chance you'd done the add 2 qt and park down hill thing to see if the oil pressure goes up?

I did the down hill and it didn't help. I also overfilled a few quarts and that didn't help either. So I'm assuming the oil pump is completely shot.

 

[Charles Hughes]

Does anyone know if th camshaft is a 2 bolt or a 3 bolt? apparently auto zone, napa and O'Reilly all have different answers lol. I was kind of hoping to have it in my hands before tearing it apart. O'Reilly says 540 dollars. Online is like 330 but want to dot my i's

 

[donjetman]

Does anyone know if th camshaft is a 2 bolt or a 3 bolt? apparently auto zone, napa and O'Reilly all have different answers lol. I was kind of hoping to have it in my hands before tearing it apart. O'Reilly says 540 dollars. Online is like 330 but want to dot my i's

Cams w/VVT have 1 bolt, without VVT have 3 bolts.

 

[Charles Hughes]

Cams w/VVT have 1 bolt, without VVT have 3 bolts.

Well the vin decide said vvt, and many others have said vvt as well so I will go that route.

 

[Fernando Escobar]

I'm there with you. I had low oil pressure right after doing an oil pan gasket and o ring swap. but my truck has DOD. my cam bearings and rod bearings were shot so that also game me low oil pressure. hope you don't have my luck!

 

[Charles Hughes]

Well if you look at that cam picture it's pretty worn. So maybe I will order a stage 3 kit, new chromoly push rods and see where that takes me

 

[Geotrash]

Here is a question for everyone. I looked at the cam right before reassembly and I'm noticing some marks. Wondering if I should replace this cam? Should I consider like a stage 2/3 kit?

Yeah that cam is damaged. Time to yank it out of there. Careful with a stage 3 though. I had a BTR stage 2 cam with a lope for a while and hated it; it would surge annoyingly at traffic lights. A higher stall TC would've helped but I just didn't care for the lope in daily driving.

To replace it, I went with a cam motion stage 2 truck cam, specifically because it has a smooth idle. You can tell it's cammed and it makes great power, but it's smooth.

 

[Charles Hughes]

I will check it out. I heard that about stage 3 and wasn't sure.

 

[Foggy]

Any "Stage 3" cam belongs in a lighter weight car.. Not a truck..
And unless you are going with a 2800 stall, it won't work at all..
I'm sure someone has made it work, just not a true daily commuter suv

Also, if the cam bearing surface is damaged like you show
it's very likely that your cam bearings are worn...
So even a new camshaft will do nothing for your oil pressure issue

 

[Geotrash]

Also, if the cam bearing surface is damaged like you show
it's very likely that your cam bearings are worn...
So even a new camshaft will do nothing for your oil pressure issue

I think those are just the lobes, but I agree that it’s worth checking the cam bearings.