Looking For Advice with Valley Pan Gasket Replacement

[Jason in DLH]

Thanks to @89Suburban for recommending my oil leak to be a Valley Pan Gasket leak. I’ve looked further into it and it certainly is a problem with the NNBS it seems and will be replacing mine.

With that said...I’m looking for advice in other preventative maintenance items to change while I’m in there. So far, I’ll be replacing these:

-Valley Pan Gasket, and Seals
-Intake Manifold Gaskets

I’ll also clean the throttle body while it’s out and will clean the oil pressure sensor filter since it’s easy access.

Anything else I should change/clean?

2007 Yukon Denali 6.2L L92 with 140,000 miles.

 

[OR VietVet]

Well, you have no knock sensors to deal with thankfully. What brand of gaskets/seals do you plan to use. IMO, stay with AC Delco or Fel-Pro but others here may have their own opinions on that. Have you seen any seepage at all at the valve covers? Also, IMO, if I was that far in to it I would do the oil pressure sender while apart and have better access. Unless the 6.2 access is not as bad as the 5.3.

 

[Jason in DLH]

I’m using “Genuine” valley Pan, Gasket, seals, and bolts (all for $60) from PartsGeek as well as FelPro Intake gaskets. I did go ahead and order a new Oil Pressure Sensor since it’s right there. I still have time to cancel the order if the “Genuine” brand is no good (first I’ve heard of them!).

I haven’t noticed any oil seepage around the valve covers at all, so they should be good.

 

[Jason in DLH]

Here’s the Valley Pan, gasket, etc...

https://www.partsgeek.com/ss/?i=1&ssq=18956-01366476

 

[OR VietVet]

Yep, never heard of them. May be great but I don't know.

 

[iamdub]

Thanks to @89Suburban for recommending my oil leak to be a Valley Pan Gasket leak. I’ve looked further into it and it certainly is a problem with the NNBS it seems and will be replacing mine.

With that said...I’m looking for advice in other preventative maintenance items to change while I’m in there. So far, I’ll be replacing these:

-Valley Pan Gasket, and Seals
-Intake Manifold Gaskets

I’ll also clean the throttle body while it’s out and will clean the oil pressure sensor filter since it’s easy access.

Anything else I should change/clean?

2007 Yukon Denali 6.2L L92 with 140,000 miles.

Looks like they're playing off of the "GM Genuine" line of parts, which are the ones that the factory installs. There are other levels of "GM" branded parts, but they're produced by aftermarket companies to be sold at lower price points. I don't see how someone could mess up a valley cover, so it'll probably be fine. Just keep your original, at least for a little while in case something develops. Speaking of, why not keep your original cover and just replace the gaskets?

As far as other parts, I'd get the updated driver side rocker cover (don't forget the gasket(s) if not included) if yours hasn't been updated yet.

For gaskets, AC Delco, Fel-Pro or Mahle have all served me well. Since you'll have it off, clean out the intake manifold. You'll likely have oil puddled up at the back of it. I use a can of engine degreaser and 3-4 cans of brake parts cleaner- the SuperTech brand from WalMart works great and is half the cost of the "skim milk" ones. The oil in the manifold and rearmost cylinders is why we get the updated rocker cover and a catch can. At only 140K miles, you likely aren't past the point of no return, but you're approaching it if you don't act now.

 

[Jason in DLH]

Looks like they're playing off of the "GM Genuine" line of parts, which are the ones that the factory installs. There are other levels of "GM" branded parts, but they're produced by aftermarket companies to be sold at lower price points. I don't see how someone could mess up a valley cover, so it'll probably be fine. Just keep your original, at least for a little while in case something develops. Speaking of, why not keep your original cover and just replace the gaskets?

As far as other parts, I'd get the updated driver side rocker cover (don't forget the gasket(s) if not included) if yours hasn't been updated yet.

For gaskets, AC Delco, Fel-Pro or Mahle have all served me well. Since you'll have it off, clean out the intake manifold. You'll likely have oil puddled up at the back of it. I use a can of engine degreaser and 3-4 cans of brake parts cleaner- the SuperTech brand from WalMart works great and is half the cost of the "skim milk" ones. The oil in the manifold and rearmost cylinders is why we get the updated rocker cover and a catch can. At only 140K miles, you likely aren't past the point of no return, but you're approaching it if you don't act now.

Thanks for the info. I’m interested to see the amount of oil in the manifold.

I’ll take your advice and swap out the driver valve cover (once I find it).

Definitely will be installing a catch can in the near future as well.

I’ve always used CRC Brakleen...is this “skim milk” to the Super Tech?

 

[donjetman]

Valve cover driverside – GM# 12570427 - $117 amazon or rock auto.

We bought our 07 Denali w/6.2 L92 in the fall of 2018 w/130k miles. I'm a DIYer and did the following in the first 6 mths of ownership:

Brake pedal stop light switch - SL1000 - $19 NAPA

Gas cap – ACDelco GT330 $19 amazon

Vapor cannister purge valve on intake – ACDelco# 214-1680 - $18 amazon

air filter, NAPA 22487 - $9

cleaned MAP sensor and throttle body - $1

Catch can, line, fittings - $40 amazon

brake fluid - $6

PS fluid, Amsoil ATF - $6

Frt diff gear oil w/3 pts Amsoil 75-90w - $21

Rear diff gear oil w/4.2 pts Amsoil 75-90w & gasket - $40

Transfer Case ATF w/3 pts Amsoil (ATL) ATF - $16

Transmission fluid, 10 qts, w/Dexron VI, $75

Tranny filter – PTC# F247 - $34 amazon

Torque Converter – Precision P4646 - $218 Nogalitos Gear

Tranny front pump seal – GM# 24237531 - $30 Gunn GMC

Tranny Input shaft seal – GM# 24219390 - $10 Gunn GMC

AFM Deflector – gm#12639759 - $8 Gunn GMC

Main serpentine belt – 6K935 - $19 NAPA

tensioner - $32 NAPA

idler pulley - $22 NAPA

idler pulley - NAPA $16

AC belt – 4K378 - $16 NAPA

tensioner - $28 NAPA

Trans cooler line 1 – ACDelco 15779543 - $16 amazon

Trans cooler lines 2 – ACDelco 25999419 - $56 amazon, but #25999420 is better.

Trans cooler clips- ACDelco# 24205103 - $10 amazon

Trans cooler gasket - $7 amazon

Front lower plastic cowl - $31 amazon

Rear main seal & cover – Dorman 635-518 - $43 amazon

Valve cover driverside – GM# 12570427 - $117 amazon

Oil pan gasket – GM# 12612350 - $36 amazon

Oil pickup o-ring – Felpro 72401 or GM 12584922 - $9 amazon

Starter – 6757N - $60 amazon

Alternator (160 amp) – 8301N - $101 amazon

Oil cooler adapter-ICT - $24.99 amazon

Oil cooler adapter gasket – Felpro 72462 - $8 amazon

Cleaned old spark plugs and reinstalled

New spark plug wires, ACDelco 9744RR - $31

Right headlight asembly - TYC 20-6801-00-1 - $48 amazon

Exhaust Manifold clamp, back driver side – APDTY# 028218 - $30 amazon

Exhaust manifold clamps, frt driver side, back pass – APDTY#028253- $67 amazon

Front pass side door handle – 735-6526 - $49 - NAPA

Frt sway bar end link poly bushings - $15 autozone

Frt sway bar bushings – Moog# K200222 - $7 – amazon

Rear sway bar bushings – Moog K6408 - $8 - amazon


Performed TSB 10-06-01-008M that included: changing the driver side valve cover w/# 12570427, installing deflector# 12639759 on the oil pressure relief valve, flushing/soaking all cylinders/combustion chambers w/Motor Medic solvent


Cleaned passenger side valve cover inside and out

 

[Jason in DLH]

Valve cover driverside – GM# 12570427 - $117 amazon or rock auto.

We bought our 07 Denali w/6.2 L92 in the fall of 2018 w/130k miles. I'm a DIYer and did the following in the first 6 mths of ownership:

Brake pedal stop light switch - SL1000 - $19 NAPA

Gas cap – ACDelco GT330 $19 amazon

Vapor cannister purge valve on intake – ACDelco# 214-1680 - $18 amazon

air filter, NAPA 22487 - $9

cleaned MAP sensor and throttle body - $1

Catch can, line, fittings - $40 amazon

brake fluid - $6

PS fluid, Amsoil ATF - $6

Frt diff gear oil w/3 pts Amsoil 75-90w - $21

Rear diff gear oil w/4.2 pts Amsoil 75-90w & gasket - $40

Transfer Case ATF w/3 pts Amsoil (ATL) ATF - $16

Transmission fluid, 10 qts, w/Dexron VI, $75

Tranny filter – PTC# F247 - $34 amazon

Torque Converter – Precision P4646 - $218 Nogalitos Gear

Tranny front pump seal – GM# 24237531 - $30 Gunn GMC

Tranny Input shaft seal – GM# 24219390 - $10 Gunn GMC

AFM Deflector – gm#12639759 - $8 Gunn GMC

Main serpentine belt – 6K935 - $19 NAPA

tensioner - $32 NAPA

idler pulley - $22 NAPA

idler pulley - NAPA $16

AC belt – 4K378 - $16 NAPA

tensioner - $28 NAPA

Trans cooler line 1 – ACDelco 15779543 - $16 amazon

Trans cooler lines 2 – ACDelco 25999419 - $56 amazon, but #25999420 is better.

Trans cooler clips- ACDelco# 24205103 - $10 amazon

Trans cooler gasket - $7 amazon

Front lower plastic cowl - $31 amazon

Rear main seal & cover – Dorman 635-518 - $43 amazon

Valve cover driverside – GM# 12570427 - $117 amazon

Oil pan gasket – GM# 12612350 - $36 amazon

Oil pickup o-ring – Felpro 72401 or GM 12584922 - $9 amazon

Starter – 6757N - $60 amazon

Alternator (160 amp) – 8301N - $101 amazon

Oil cooler adapter-ICT - $24.99 amazon

Oil cooler adapter gasket – Felpro 72462 - $8 amazon

Cleaned old spark plugs and reinstalled

New spark plug wires, ACDelco 9744RR - $31

Right headlight asembly - TYC 20-6801-00-1 - $48 amazon

Exhaust Manifold clamp, back driver side – APDTY# 028218 - $30 amazon

Exhaust manifold clamps, frt driver side, back pass – APDTY#028253- $67 amazon

Front pass side door handle – 735-6526 - $49 - NAPA

Frt sway bar end link poly bushings - $15 autozone

Frt sway bar bushings – Moog# K200222 - $7 – amazon

Rear sway bar bushings – Moog K6408 - $8 - amazon


Performed TSB 10-06-01-008M that included: changing the driver side valve cover w/# 12570427, installing deflector# 12639759 on the oil pressure relief valve, flushing/soaking all cylinders/combustion chambers w/Motor Medic solvent


Cleaned passenger side valve cover inside and out

Thanks for the comprehensive list! I was trying to figure out the new PN for the updated valve cover, so that’s very helpful, thanks!

I just purchased a JLT catch can from Summit for $140.

 

[89Suburban]

Jason I am noticing that cover you picked does not have the solenoid assembly on it. Please be aware they are riveted on at least in my case. Don't want to see you tear it apart for nothing and be screwed like I was. Not sure about the 6.2's never messed with one.