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Discussion Starter #1
Hello All!
I really missed up my car and need some advice. :confused:

I have a '04 C240 that had a transmission leak and me and my dad decided to change the oil and put in a new gasket. Well... he put the transmission oil in the motor and then drove it. Which made it come up in smoke. So he clean the transmission and motor and put everything back where it goes. But now it's making a loud noise. I took it to the dealer and they screwed me 200 bucks to tell me something that wasn't even the problem. They said it was the motor rods. Fixed that and its still making that noise. They are the experts how could they not know?!!! :mad:

Where is that loud noise coming from? How did a little mistake get so big? I want my car back. Can someone please HELP!!
 

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Can you give us some more info on what it sounds like? high or low pitched, rate related to engine rpm or speed, location that you can hear the sound best from, how loud is it, anything that might help us help you.

They said it was the motor rods. Fixed that and its still making that noise. They are the experts how could they not know?!!!
Taking a wild guess i would probably agree with them if you put it in the engine...HOW did you fix the "motor rods"??
 

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sorry OP but this is a very confusing post. Can you get your dad or someone who understands the parts of the car to post exactly what you had done, as your description doesnt make sense.

The transmission oil goes in the trans not the motor, and if it went up in smoke, how did you "put everything back where it goes" ? If you added trans oil to the existing motor on top of the oil it had, the engine would blow all its seals from excess oil and would leak everywhere, that would be a big job to fix.

What part of the motor or trans did the gasket get done on?

Sorry but its not possible to advise you based on your description of what happened :)
 

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After re-reading your post I reckon your dad did put the trans oil in the motor, so the oil would be overfilled, the seals would have burst and now the engine is pretty much goosed im afraid, the trans oil should have gone in the trans filler not the engine oil filler.

Excess oil is the kiss of death for a motor and it may have burst a piston connecting rod, thats a motor tear-down job and beyond a home mechanic to fix.

I am sorry to say this but my initial feelings are that the motor is blown now, and what you were cleaning up after the smoking was all the oil that had come out of the motor when it went pop.

You need to find a friendly mechanic, explain what you did and get his opinion.

Hope this helps somewhat, I know it wont be pleasant news but thats what it seems you have done.

:)
 

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sounds like the tranny fluid in the motor oil resulted in a spun rod bearing which causes the knocking. Thats not exactly something that is a nonchalant "we fixed that".

A burst or thrown connecting rod would generally prevent the engine from running due to the nice hole in the block and piece of rod generally smacking everything in sight.
 

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Sounds like the engine is pretty much done for.
 

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Well, the only thing I don't understand is, if you put the tranny fluid in the engine, how did you "drive it"? With no oil in the trans, it shouldn't move.
Now, about your engine.
First of all, the odds that you would blow any seal out of the engine is slim to none. Now if you started it and it started to knock snd you shut it down right away, there is a good chance that you simply caused wear on the connecting rod bearings and no damage at all on the crankshaft. If this is indeed the case, than all they would have to do is drop the oil pan and change the cap and rod bearings. Whether they needed to remove the engine or not, I do not know.
Now, assuming somehow you did manage to take your car for a spin, you probably fried the transmission.
You need to describe the noise you are hearing a little better than that. It would also be beneficial to you to have an engine specialist listen to the noise.
 

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whoisdis - if your engine was full, and you put tranny oil in on top of what was there, what do you think would happen? Of course it would blow. Overfilling the oil is the kiss of death, no mistake. Read the OP - it says they put the oil in the motor and it went up in smoke.

The hydraulic shock of the piston skirts slamming down into an overfilled oil pan would wreck the engine. I have seen an engine run after being overfilled and it did indeed go bang after only a few minutes.
 

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Blown seal, that's funny, reminds of this joke -

A penguin is taking a road trip when his car suddenly breaks down. Luckily for him, he finds himself just down the street from a mechanic. So,he pushes his car to the shop and asks the mechanic to take a look. The mechanic tells him that it will probably take a little while to find the problem and asks him to come back in an hour.

The penguin goes over to the supermarket, buys some fish sticks and vanilla ice cream, and spends the rest of the hour hanging out in the frozen section. After the hour is up, he waddles over to the mechanic's shop.

Seeing him come in, the mechanic walks over, and wiping his hands on a rag, says, 'Looks like you've blown a seal.'

The penguin blushes, wipes his beak with his flipper and says, 'No, it's just vanilla ice cream.'
 

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The hydraulic shock of the piston skirts slamming down into an overfilled oil pan would wreck the engine. I have seen an engine run after being overfilled and it did indeed go bang after only a few minutes.
You would REALLY need to overfill it for the oil to end up higher than the crank all the way to the bottom of the cylinders.

Im talking like 15 quarts+
 

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I dont know what a quart is mate, we use litres or gallons in the UK but the max mark is there for a reason. Im a professional engineer and overfilling is bad news, no 2 ways about it. The sump is tiny and the crank only a couple of inches above it.

You can believe what you want but I have seen this with my own eyes when someone else overfilled a chevette here with 2 litres more than it should have, and it lasted about 3/4 of a mile before a conrod came through the side.

Im beginning to think the OP was a joke actually, since they havent posted again since all the replies.
 

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Discussion Starter #12
THANK YOU SO MUCH FOR ALL THE REPLIES!!
Sorry for the brief OP but it was a long chain of events and didn't want to make it so long.
The mechanic who fixed one the rod took another look at the motor and found the rod that was making all that knocking. The replies really helped. I wish i would of found this site earlier. We'll see how it goes from here.

Thanks again!
 

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:rotfl:
As far as this guy's problem, like I"ve said before...in some people's case,
"step away from the toolkit".
Not properly researching and re-researching stuff before executing can be hazardous to your pocketbook.
Your dad is an idiot. Tell him I said so.
:tool::shit not::stupid:
Blown seal, that's funny, reminds of this joke -

A penguin is taking a road trip when his car suddenly breaks down. Luckily for him, he finds himself just down the street from a mechanic. So,he pushes his car to the shop and asks the mechanic to take a look. The mechanic tells him that it will probably take a little while to find the problem and asks him to come back in an hour.

The penguin goes over to the supermarket, buys some fish sticks and vanilla ice cream, and spends the rest of the hour hanging out in the frozen section. After the hour is up, he waddles over to the mechanic's shop.

Seeing him come in, the mechanic walks over, and wiping his hands on a rag, says, 'Looks like you've blown a seal.'

The penguin blushes, wipes his beak with his flipper and says, 'No, it's just vanilla ice cream.'
 

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^ x2..
 

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Well, lets say one of six pistons are on its way down. Guess what one of the other pistons are doing? You got it! It is on its way up! Therefore, ther is no pressure build-up in the crankcase. Also, once the oil pump starts turning, there is over one liter/quart flowing through the system, so the crankcase is no longer as full as it was before it started.
Now, if you blow a rod because you overfilled your crankcase, it is not caused by any "pressure build-up" in the crankcase but by the crankshaft trying too hard to spin in the motor oil. I know, I have seen this case come through my shop a couple of times.
 

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yeah what I mean by hydraulic pressure is if the piston encounters lots of oil on the cylinder walls on the down stroke. That drag can snap a con rod. I wasnt talking about crank case pressure.

And the pistons fire one at a time, but they move in sets man, on a v6 there are 3 going down as 3 are coming up obviously, they dont move one at a time!!! LOL!
 

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Yeah, the crank should not contact the oil much in normal operation, or all sorts of Bad Things can happen. I would be surprised if oil on the cylinder wall snapped a con rod, but suppose it could happen. Certainly overfilled oil can do serious damage to the crank and bearings.
 
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