Z51 John

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jayshoaf

Order my oil from Napa ,same price as Amazon

CLAVERY

Current list prices from GM as of Dec 1 update. What your dealer sells them to you for may differ.

capevettes

Dave, I'm doing mine soon. Not sure if you have.
I watched that you tube oil change video. It appears the plastic plug gets pushed up and is turned to the right and comes to a stop. Then the video shows him giving it a slight turn to the right with a socket to snug it. No torque spec given. I know he specified 18 ft lbs for the filter housing and the other (15MM) drain plug).
Is it just a matter of "snugging" it gently or what? Don't want that coming out.
Anyone that's done this know?

AzDave47

I have not done the oil change or played around with the plug. My "understanding" is to take it out you push up and do a quarter turn (don't remember left or right, but suspect left) and pull the plugh out. Installing it would be just the reverse, not aware that any socket should be used, just make sure when you put it in,do the opposit turn and make sure it seats back down the amount you hat to push up. Since the plug drains the dry sump tank, there should be little or no pressure and the o-ring seals it.

I agree, input from someone that has already done the Z06 oil change themselves - first hand experience would be good input.

capevettes

Yes, looks like you push it up and then over to the right about 1/4 turn to a stop to install, but the guy did put a socket on it after that?? He appeared to be just snugging it with light pressure to the right. I don't want to break the thing but I certainly don't want it coming out.. Hopefully someone chimes in that has done it.

AzDave47

My "expectation" is that once the plug is pushed up and to the right, it would drop down slightly into a final resting notch and trying to turn it any further to the right would serve no purpose other than to possibly break the tab that sits in the notch. It would be the o-ring that seals the tank from leaks.
See:

https://www.midenginecorvetteforum.c...echnical-steps

On the C6Z transmission drain, the plug had an o-ring on it. When you reinserted the plug into the machined housing, a spring clip held the plug in place with the o-ring sealing it from leaks, not any torque holding the plug. The C8Z dry sump tank drain seems to be a variation on this theme, another reason to talk to any tech doing an oil change on this car.

I would still like input form someone who has hands-on experience doing this.

capevettes

I'll be at the dealership in Rhode Island tomorrow picking up a buddy's Z06. He's out in California. They have an excellent Corvette Z06 Tech there. I'll ask him and report back tomorrow.

Crossofiron

These plastic plugs have been used on 2020 and new Chevy Blazers. You do not need to replace each time if you are careful to not treat them like a old school metal plug.

Kracka

RockAuto has the OEM GM oil filter, drain plugs, gaskets, etc.

Engine oil filter: https://www.rockauto.com/en/moreinfo...t=5340&jsn=488

Plastic drain plug: https://www.rockauto.com/en/moreinfo...=10231&jsn=491
-gasket: https://www.rockauto.com/en/moreinfo...t=5428&jsn=497

Metal drain plug: https://www.rockauto.com/en/moreinfo...=10231&jsn=492
-gasket: https://www.rockauto.com/en/moreinfo...t=5428&jsn=496

capevettes

I spoke to the Z06 Tech at Masse Chevrolet today regarding the plastic plug. He said you do not torque it. Use a 3/8" drive, push it up and over to the right until it stops, about 1/4 turn. There are 2 little tabs on the plug that line up with the stops it threads into.
He also said it's important to pull the drains within 10 minutes after shut down to get all the oil out of the sump.

Mitchell_B

Disagree. After shutting my car down, by the time I get the car up on my Quickjack and pull the tank and engine oil plugs, its at least 1/2 hour. And it always takes just about 7 3/4 - 7 7/8 quarts to bring the oil level to the top of the hash marks on the stick.

AzDave47

Chevy wants you to start your car up on the QJ and warm up the oil so when you take out the plugs the newly ho oil will get on your hands.

Mitchell_B

Is that how it’s done at their dealerships? It’s probably in their training manuals……

capevettes

Well, the capacity on the Z06 is 8 quarts. Maybe your delay causes you not to get it all out? That is what the tech that does it for a living told me.

Mitchell_B

I would give credence to some oil draining back into the engine from the suction side of the pump which you could not recover by pulling the engine drain plug. And if this is the case, I change my oil often enough so that 1/4 - 1/8 quart not recovered on an oil change is of no consequence to me.

AzDave47

Follow the link I posted in #27 above, the procedure clearly states draining the oil within 10 minutes of shutdown.

Mitchell_B

Nothing said about oil temp. Seems the concern is oil bleeding back into the engine through the scavenge side of the pump. Legitimate I guess. Still, leaving 1/8 to 1/4 quart of oil in the engine is not a big deal to me. If I only changed oil at 7500 miles, then a bigger deal…..

AzDave47

Nothing said in your posts about oil temp. either

Mitchell_B

I posted a write-up on changing oil on an LT6. I guess you did not see it…..