Valley Cover, Crank Pulley, etc

donjetman · Jun 21, 2024

07 Yukon Denali non-AFM 6.2L w/198k miles today
I'm finally getting around to changing the valley cover & gasket, oil pressure sender, crankshaft pulley & seal, and timing cover gasket. If the timing chain and/or tensioner are worn I'll change them, and the cam position sensor too. I've had these parts for over a year.

donjetman · Jun 21, 2024

Taking things apart

skpyle · Jun 21, 2024

Nice. Good Luck!

Dustin Jackson · Jun 22, 2024

@donjetman What else are you doing? Looks like you have your steering rack unbolted

donjetman · Jun 22, 2024

Dustin Jackson said:
@donjetman What else are you doing? Looks like you have your steering rack unbolted

Good eye.
In 2018 when we purchased it w/130k miles. I immediately installed a catch can, did TSB 10-06-01-008M including a new improved GM driverside valve cover, did a extra long piston combustion chamber soak, and installed relief valve deflector. All 8 cylinders had stuck piston rings. There was a lot of carbon buildup in the engine (see pics below). I also installed rear main seal with a new cover, and removed a cleaned out the oil pan, and installed an oil pump pickup tube o-ring.

At that time I cleaned the inside of the passenger side valve cover and the oil pan. I replaced with new the driver side VC and RMS cover. Now I've decided to clean & seal up the other dirty weepy areas I can get to.

I'm removing the oil pan again to see if the Valvoline Premium Blue "Restore" (20%) and Mobil 1 (80%) motor oil are doing any cleaning. VPB Restore oil was/is designed to clean. Don't confuse (off the market) VPB "Restore" with their new offering "Restore and Protect". They are completely different animals.

While its off I'll change the O-ring again. It's never had an oil pressure issue.

The stuff I'm doing I consider to be preventative mx for reliability when driving between our TX & CO mtn homes.

Here's what it looked like in 2018:

More to come soon

donjetman · Jun 22, 2024

Today, 5+ yrs and 68k miles later at 198k miles, here's what the valve cover and oil pan look like. Valve covers are still clean and the oil pan had a little slushy carbonous material from the VPB "Restore" motor oil doing some cleaning, but was otherwise clean. The debris easily cleaned up with mineral spirits and a soft brush, wasn't stuck to the pan.

More to come soon

Bluewaffle · Jun 22, 2024

donjetman said:
Good eye.
In 2018 when we purchased it w/130k miles. I immediately installed a catch can, did TSB 10-06-01-008M including a new improved GM driverside valve cover, did a extra long piston combustion chamber soak, and installed relief valve deflector. All 8 cylinders had stuck piston rings. There was a lot of carbon buildup in the engine (see pics below). I also installed rear main seal with a new cover, and removed a cleaned out the oil pan, and installed an oil pump pickup tube o-ring.

At that time I cleaned the inside of the passenger side valve cover and the oil pan. I replaced with new the driver side VC and RMS cover. Now I've decided to clean & seal up the other dirty weepy areas I can get to.

I'm removing the oil pan again to see if the Valvoline Premium Blue "Restore" (20%) and Mobil 1 (80%) motor oil are doing any cleaning. VPB Restore oil was/is designed to clean. Don't confuse (off the market) VPB "Restore" with their new offering "Restore and Protect". They are completely different animals.

While its off I'll change the O-ring again. It's never had an oil pressure issue.

The stuff I'm doing I consider to be preventative mx for reliability when driving between our TX & CO mtn homes.

Here's what it looked like in 2018:
View attachment 430891
View attachment 430892
View attachment 430893
View attachment 430894
More to come soon

Are those Barnacles on the spark plugs

Bluewaffle · Jun 22, 2024

Bluewaffle said:
Are those Barnacles on the spark plugs

I'm about to be in mine here soon good luck

donjetman · Jun 22, 2024

Changed out the 5+ yr young o-ring while I'm in there. It was still soft and pliable, but losing its round cross section shape. Installed a Mahle # B32790. Pickup screen was/is clean.

donjetman · Jun 22, 2024

Bluewaffle said:
I'm about to be in mine here soon good luck

All 8 were like this. It didn't have a miss, and it wasn't throwing any codes or CEL.

Valley Cover, Crank Pulley, etc

donjetman

Full Access Member

donjetman

Full Access Member

skpyle

Full Access Member

Dustin Jackson

Full Access Member

donjetman

Full Access Member

donjetman

Full Access Member

Bluewaffle

TYF Newbie

Bluewaffle

TYF Newbie

donjetman

Full Access Member

donjetman

Full Access Member

Similar threads

Forum statistics

Latest posts