Valvoline Restore & Protect experiment

[Fless]

Look at your driver's side door jamb sticker on the upper right hand top corner and it will show the build date. For example, mine is 11/10

Off the subject a little, when did we go back to using two-digit years? I would think after all the Y2K hysteria we'd be using 4 digits.

 

[opfor2]

Off the subject a little, when did we go back to using two-digit years? I would think after all the Y2K hysteria we'd be using 4 digits.

I'm quoting the door decal

 

[Fless]

I'm quoting the door decal

I know, it's not on you. Just an a-nal observation.

 

[j91z28d1]

Look at your driver's side door jamb sticker on the upper right hand top corner and it will show the build date. For example, mine is 11/10

4/11. so now I'm really not sure haha. could be either.

 

[opfor2]

4/11. so now I'm really not sure haha. could be either.

Your Tahoe was built on April 2011, you should have the new valve cover however, the only sure way to know is that you need to remove the driver side cover and look at it.

 

[rdezs]

There is one issue with using the revised valve cover on the earlier LS engines, such as the lq4. (I have one in a 2003 Hummer) Almost immediately started getting condensation in the bottom of the oil pan. The revised valve cover has a very small orifice. Tiny compared to the early style with the actual PCV valve. I doubled the size of the orifice, reinstalled the valve cover, and no more condensation. If you have adequate vacuum in the crankcase, you should be able to lift your dipstick up slightly and hear the idle change. Or the oil filter cap. That had no effect prior to enlarging the orifice. And even with the larger orifice, no oil consumption between oil changes at all. It doesn't affect the idle, as the ECM compensates.