Hey guys,

I just got my first oil change done on my Z06 and I noticed an odd bubbling/boiling liquid sound after I shut the car off. I waited about 10-15 minutes and checked the oil level. The oil level was about an inch past the top of the hash markings.

How much of a problem is this? Will I need to go back to the shop to have them drain a little out?

 

Per the manual, you should never overfill an LS7. If you don't have one, go get a cheap fluid extractor and simply suck some out of the dry sump tank when the engine is still warm. You'll need a fairly long tube to get to the oil but I've done it in the past and it works great.

 

I'm probably just going to take it back to the shop so they can make it right. Is it safe to at least make a 10-15 minute drive to the shop?

Thanks for responding!

 

The car should not be driven if the oil is signicantly overfilled and bubbling. Many, many bad things can happen. The oil can overflow from the tank, be pushed out the breather and into your intake manifold. From here it can hydrolock one or more cylinders (goodbye motor) and/or back up into the air intake causing a huge mess.

Few things:

1) Never let anyone change your oil except yourself. If you insist on bringing it somewhere, ensure that they know how much oil should be added and how the oil level is checked (car must be warmed up). You must watch every single step that is taken.

2) Either suck the oil out of the dipstick or simply drain it all out and start over. This is a simple procedure.

3) Never return to this shop again as long as you live.

 

At minimum, I would call the shop and have them answer to what you found. I would want documentation just in-case there has been some damage. If it's overfilled, I feel they owe you the tow to the shop to get it resolved.

 

Thanks guys. I ended up getting the remainder siphoned out and all looks good now on the dipstick. No bubbling noise anymore after shutting it off either. I really hope no damage was caused. I drove home about 6-7 miles from the shop with it overfilled.

Its somewhat odd that he overfilled it because my Z06 calls for 8.5 quarts (late 08 model) and he only used 8 quarts of the jugs that I brought him. Is it possible that he forgot to drain the oil from the sump or the tank? What are the capacities of each?

Thanks guys!

 

Bank that he missed the second drain plug for the sump pan itself. (one next to the filter), which holds a little under a quart that is falling off the motor with the engine turn off..

Hence if you are going to two step the system with only one catch pan, then you start with the front plug to pull the oil out of the system and tank, and once it has drained you can put a small catch pan under the front plug opening, then move the main oil catch over to the second plug for the small amount of oil still in the sump pan to go after the one next to the oil filter next system next with pulling the filter as well, with both plugs open to allow the last of the two to drain out the last of the way.


Oem dry sump pan, so you can see why the two plugs are located where they are at. Hence the front one drains the system/tank, while the second one on the side drains what is falling off the inside of the motor when its was shut down/ has not been recollect by the system once is running again. So again, just under a quart once the motor has been shut down and the last of oil draining down from the inside of the engine/until the motor is started up to pull and keep most of the sump oil in the system as it falling down off the inside of the block isntead (under about 1/4 of quart when the motor is running isntead).

 

Frankie, I tried to respond to your last private message but received the following error:

Frankie15 has exceeded their stored private messages quota and cannot accept further messages until they clear some space.

 

Here's a video showing how I change my oil. I'm very **** and meticulous, but it's not hard, and as said above, I would never let anyone else do it unless I'm physically unable. (And even then, I would watch them like a hawk.)

All you need is a set of ramps and jacks. After that, it's just paying attention to the procedure.

Try it yourself next time!

 

I will definitely be doing it myself next time. The only reason I didn't is because I currently live in an apartment community and they don't allow residents to work on their cars if it requires jack stands. Stupid, I know. I should have a garage this time next year so I can do these myself.

The shop owner did make it right though and redid the oil change at my request. I wasn't crazy at the thought of 1-1.5 quarts of old oil sitting there in the event he didn't remove both drain plugs (sounds like he didn't). Shop owner walked me through step by step as he did it to show me it was being done properly this time.

Thank you so much guys for all your input. Really appreciate it.