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Old 12-13-2008, 08:45 PM   #1
sam11
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Exclamation Engine Clunking Noise?

Not sure if this is the right place, wan a mod move this to the right section, please.

Have a 2005 2.5RS with 54,000 Km's

My brother was driving home last night @ 3 AM and was joined by an Acura club & a few BMW's.

Began to drive more aggressively and the check engine light came on, followed by the engine making some clunking noise.

Makes this loud clunking noise at low revs and the noise dissipates into the higher revs, but not as much.

Anyone know the problem?
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Old 12-14-2008, 02:13 AM   #2
jrobe
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What code does the CEL give you? That's the first place to look.
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Old 12-14-2008, 03:02 AM   #3
raheezy69
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mobile 1 5w30?
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Old 12-14-2008, 04:22 AM   #4
sam11
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The car was last serviced at 46,000 km.

Quote:
Originally Posted by jrobe View Post
What code does the CEL give you? That's the first place to look.
How do I get the CEL code? The CEL light flashed a few times, in which we slowed down, and later heard the noise.

Quote:
Originally Posted by raheezy69 View Post
mobile 1 5w30?
No, Castrol 5w30, I added 2 bottles of Castrol 5w30 this morning just in case, didn't make a difference.
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Old 12-14-2008, 10:59 AM   #5
jrobe
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An OBD2 scanner that plugs into car on the drivers side by your knee's.

You can buy cheap scanners or go to Autozone and they will scan it for you.

If you bought it from a dealer they might scan it for free, if not they will charge you more than it would cost to buy your own scanner.

Good luck.
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Old 12-14-2008, 02:02 PM   #6
piperpilot26
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knock sensor mabye? it could be pre ignition or detonation.
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Old 12-14-2008, 04:51 PM   #7
Whiteghost 2.5
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Most likely you spun a rod bearing. Engine rebuild will be in order if so.

Josh
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Old 12-14-2008, 05:35 PM   #8
sam11
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Quote:
Originally Posted by Whiteghost 2.5 View Post
Most likely you spun a rod bearing. Engine rebuild will be in order if so.

Josh
Are you kidding me? I'm the second owner, and the previous owner didn't drive the car hard, and only put 32km's on the car. It hasn't even been driven hard, until that night.

How much would that cost?

Waiting for a few members to respond to their PM's to get a scan, will know soon.
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Old 12-14-2008, 06:31 PM   #9
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Quote:
Originally Posted by sam11 View Post
Are you kidding me? I'm the second owner, and the previous owner didn't drive the car hard, and only put 32km's on the car. It hasn't even been driven hard, until that night.

Doesn't need to be driven hard if it was 2qts low on oil.

Quote:
Originally Posted by sam11 View Post
No, Castrol 5w30, I added 2 bottles of Castrol 5w30 this morning just in case, didn't make a difference.

People don't typically add oil "just in case", they add it because it is low.
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Old 12-14-2008, 08:48 PM   #10
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were you 2 quarts low or not? if you were, that + some aggressive driving can cavitate the oil pickup/pump. If you were not 2 quarts low, grossly over servicing the oil can have its own problems.

This may all be in vain now, though. especially if you are in need or rebuild. would like to know what you find out for future NASIOCer's sake.. (CEL, what the problem turns out to be)
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Old 12-14-2008, 10:23 PM   #11
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I'm not sure if it was low or not, my brother said that he checked the oil in the morning and it was low, for some reason I think the engine was cold when he checked it, even though he said he ran the engine. Either way the car hasn't been moved since.

A fellow member thought it may be a cracked gasket, but he's not sure. I will be flat bedding it to the dealership tomorrow and will update this thread once I know.
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Old 12-15-2008, 11:41 AM   #12
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sounds like a spun bearing. running an engine hard on a low oil level will do that. 2 quarts low is pretty negligent, btw.

if it is a spun bearing and you got lucky you may only need to replace the rod bearings if the crank isn't torn up. if you drove on it much at all after the noise you'll likely have to rebuild the bottom end at the very least.

does the noise sound like a metal hammer hitting a solid metal part? search youtube and you'll get an idea of what a confirmed spun bearing sounds like.
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Old 12-15-2008, 12:03 PM   #13
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Checking the oil on a cold engine would show a slightly higher oil reading on the stick as opposed to an at op temp one because the engine had not been run in a while so all the oil would be in the pan, not small deposites through out the motor so if it was low on cold... then it was low...period...

Last edited by BE6STI; 12-15-2008 at 12:04 PM. Reason: I have horrible typing skills :(
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Old 12-15-2008, 02:08 PM   #14
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There is a reason check engine lights come on.

CHECK THE CODES

Then go from there.
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Old 12-15-2008, 02:29 PM   #15
raheezy69
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sounds to me like you're fucxed
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Old 12-15-2008, 11:34 PM   #16
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low on oil + engine knocking noise = spun rod bearing.

get a new short block or engine which ever you find cheaper.
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Old 12-15-2008, 11:35 PM   #17
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these cars will run for a long time, but will break quickly with low oil
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Old 12-15-2008, 11:44 PM   #18
sam11
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I agree its a spun rod bearing. But. the odd thing is my oil light never came on.
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Old 12-16-2008, 12:59 AM   #19
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Damn, thats a hard lesson to learn, always check your oil at every fill-up, good luck with the repairs.
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Old 12-16-2008, 01:54 AM   #20
09Impreza
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It sounds like a spun bearing for sure. My BMW M3 began to make a similar noise like that so I took it to the dealer. They did not go too deep into it and replaced the VANOS unit in the car and didn't notice anything funny after replacing it. After I got it back, it made the same clunking noise at low RPMs, so I drove it normally for the next few hundred miles, thinking the sound was ok. At one point the bearing finally blew out and ruined the crankshaft and the engine sounded like an old Mercedes diesel. It turned out that the bearing had blew and the engine needed to be replaced. I would get it checked out for sure. Good luck. Hopefully the same thing that happened for me isn't happening to you even though they are two separate cars.
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