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Overfilled Oil: EIGHT QUARTS!!!

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Old Sep 18, 2005 | 03:19 PM
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Default Overfilled Oil: EIGHT QUARTS!!!

I took my 2000 convertible with 16,000 miles on it to a Cadillac-Chevy dealer near Detroit (NOT Les Stanford) for a Mobil-1 oil change. About 100 miles later, I have a terrible knocking. I know I don't have them, but its equivalent to a bad lifter knock, and its the worst (loudest) upon deceleration. I will not start the car its so bad.

I looked at the receipt from the dealership. It says 8 quarts were put in. I looked at the dipstick. Much to my horror, I see its WAY above operating level.

Several questions:

1- Is my engine destoyed? I'm gonna call the dealership tomorrow and give them the option of coming with a tow truck to get (I don't want it running), rechanging the oil and hoping the knock goes away.

2- If they give me a hard time or if it is ruined, any idea what my legal options are? If it is damaged, I don't want it "fixed", I want it replaced (the engine). Additionally, since they screwed up a simple oil change, I DEFINITELY don't want them working on the engine.

Thanks for your opinions (unless you're from Les Stanford Chevrolet, I'll soon thank you for your help, too!)
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Old Sep 18, 2005 | 03:42 PM
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Over filling your oil is not going to destroy your engine. Just let some oil out. What is worse is if they did that, you can be sure they didn't even put the correct oil in your car (weight or synthetic).
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Old Sep 18, 2005 | 04:29 PM
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Originally Posted by Shylor
Over filling your oil is not going to destroy your engine. Just let some oil out. What is worse is if they did that, you can be sure they didn't even put the correct oil in your car (weight or synthetic).
DO NOT let it out. In case you do have damage you will need that to show along with your receipt what they did. I would think to much oil would blow valve seals. You are correct in calling them to tow it and lower the oil level to see what damage, if any, was done. If they give you trouble see the GM zone rep. If no help there and it is still knocking seek a second opinion as to what the problem is and if the over fill was the likely cause.
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Old Sep 18, 2005 | 04:36 PM
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I doubt over filling will cause any damage. Unless you were racing the car, or constanly putting it under heavy load ( WOT). Usually the oil has a means of escape, most cars will blow it out of the dip stick. some will blow it into the vacuume lines etc etc, Its not good, but its not permanate damage. Definatly call the dealer ship and make them do everything. I would een ask to stand under the car and watch them drain it. Maybe even bring some empty containers to drain it in
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Old Sep 18, 2005 | 04:48 PM
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I think you learned a lesson here. Always and I mean always look over any work done by dealership service goons before you leave the lot. If you had an oil change then check the level before leaving the dealership. Don't assume they did things correctly.

One reason why I do my own oil changes, then I know it's done right.
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Old Sep 18, 2005 | 05:04 PM
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Originally Posted by Shylor

One reason why I do my own oil changes, then I know it's done right.
AMEN!!!
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Old Sep 18, 2005 | 05:25 PM
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Like the saying goes if you want it done right do it yourself.They start most of the newbees on the lube rack or the flunky stoners...
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Old Sep 18, 2005 | 05:50 PM
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On all of my other vehicles, I do change my own oil ... obsessively. Unfortunately, I can’t get under my C5 and have yet to find a capable ramp or any kind of jack that will fit under it either.

For the posts that offered helpful advice, I do appreciate it.
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Old Sep 18, 2005 | 06:03 PM
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Its ashamed that some dealerships can't do their job right. Good luck with everything and I hope there is no permanent damage. Keep us informed!!
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Old Sep 18, 2005 | 06:04 PM
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Originally Posted by YZRMAN 19 C5
Unfortunately, I can’t get under my C5 and have yet to find a capable ramp or any kind of jack that will fit under it either.
I used Rhino Ramps on the front and a floor jack at the rear.
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Old Sep 18, 2005 | 06:42 PM
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amen on the rhino ramps. they are great.
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Old Sep 18, 2005 | 06:50 PM
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Originally Posted by YZRMAN 19 C5
On all of my other vehicles, I do change my own oil ... obsessively. Unfortunately, I can’t get under my C5 and have yet to find a capable ramp or any kind of jack that will fit under it either.

For the posts that offered helpful advice, I do appreciate it.

I made mine out of plywood. start out with a few longer pieces to get it started up the ramp and add 3 inch shorter pieces till you get it to the height you want. I added a couple extra short blocks at the end for stops. they don't slide and are not a drastic incline when driving up on them.
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Old Sep 18, 2005 | 07:00 PM
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Someone please correct me if I'm wrong here, but wouldn't the result of overfilling the crankcase allow the rod journals to dip into the oil and start beating it into a froth? ( excessively aerating the oil)......thereby preventing the main bearings from being adequately lubricated?....and THAT being the cause of the "knocking" sound?

Also, I was always under the impression that the crankcase is NEVER under any sort of pressure, where excess oil would be "forced out the fill tube" or "blow out the seals"?

Am I THAT far out of touch with this modern technology?
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Old Sep 18, 2005 | 07:31 PM
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Originally Posted by MagikDraggin
Someone please correct me if I'm wrong here, but wouldn't the result of overfilling the crankcase allow the rod journals to dip into the oil and start beating it into a froth? ( excessively aerating the oil)......thereby preventing the main bearings from being adequately lubricated?....and THAT being the cause of the "knocking" sound?

Also, I was always under the impression that the crankcase is NEVER under any sort of pressure, where excess oil would be "forced out the fill tube" or "blow out the seals"?

Am I THAT far out of touch with this modern technology?
Yes that's the normal route for damage to occur. as you said if the crank hits the oil it's a bad scene!
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Old Sep 18, 2005 | 08:58 PM
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Originally Posted by MagikDraggin
Someone please correct me if I'm wrong here, but wouldn't the result of overfilling the crankcase allow the rod journals to dip into the oil and start beating it into a froth? ( excessively aerating the oil)......thereby preventing the main bearings from being adequately lubricated?....and THAT being the cause of the "knocking" sound?

Also, I was always under the impression that the crankcase is NEVER under any sort of pressure, where excess oil would be "forced out the fill tube" or "blow out the seals"?

Am I THAT far out of touch with this modern technology?
It's also the only post with an explanation of the terrible noise. I do hope that's not the case though. Keep us posted.
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Old Sep 18, 2005 | 09:05 PM
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Originally Posted by MagikDraggin
wouldn't the result of overfilling the crankcase allow the rod journals to dip into the oil and start beating
Bingo!!!

VR
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Old Sep 18, 2005 | 09:05 PM
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Originally Posted by Biker Bob
I made mine out of plywood. start out with a few longer pieces to get it started up the ramp and add 3 inch shorter pieces till you get it to the height you want. I added a couple extra short blocks at the end for stops. they don't slide and are not a drastic incline when driving up on them.
I drive mine up on some 2x4's so I can get my jack under it but that plywood is a great idea. I think I'm gonna build some of those. Thanx for sharing!
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To Overfilled Oil: EIGHT QUARTS!!!

Old Sep 18, 2005 | 09:34 PM
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Originally Posted by jers98vet
I drive mine up on some 2x4's so I can get my jack under it but that plywood is a great idea. I think I'm gonna build some of those. Thanx for sharing!
The car weighs 1.5 tons. For the cost of plywood and risk to life, simply buy the rhino ramps and be done with it. If you need to solve the slipping ramp problem, put a screw in a 1' piece of 2x material and then insert the screw into the hole at the base of the ramp. The weight of the car on the material will prevent the ramp from sliding when you contact it.

- Wisdom
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Old Sep 18, 2005 | 09:40 PM
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I heard that an overfilled car is as bad as a underfilled one...
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Old Sep 18, 2005 | 09:44 PM
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Originally Posted by MagikDraggin
wouldn't the result of overfilling the crankcase allow the rod journals to dip into the oil and start beating it into a froth? ( excessively aerating the oil)......thereby preventing the main bearings from being adequately lubricated?....and THAT being the cause of the "knocking" sound?
I was thinking the same thing. I would add that if this were the case, then a drop in oil pressure would be noticed, or at least fluctuating pressure. YZRMAN 19 C5, did you notice your oil pressure moving around? Also, I would assume this could cause the oil pump to become, 'unprimed'. The main bearings are not the only thing that could be affected. The valve train could also have issues. The oil filter could be cut open to look for metal shavings, or an oil analysis could be performed to look for metal in the oil. Both cases would point to bearing failure. The type of metal would indicate which bearing system has been compromised. But this should be done by a GM mechanic and the results documented. I have read other posts where there was dealer culpability that a regional rep was called and a case made that way. This way the whole process is documented and nobody can squirm out of it. I am concerned that if the dealer gets a hold of the car, they will just drain the oil and deny any responsibility and you won't have anyway to put pressure on them to get this resolved. i.e your word against theirs.
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