HELP...Loud Noise Coming from Supercharger or Engine
#1
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HELP...Loud Noise Coming from Supercharger or Engine
Stopped to get some gas and left the car running. As I re-enter the road from the gas station I start to hear a horrible loud metal noise immediately pull over and turn off the car. Pop the hood things look fine and there is no CEL. Crank it with the hood up to try to determine the location of the noise and isolate it down the the SC, I think. Local PD comes up and lends me tools to cut the belt off. Crank the car again and after 3-5sec the noise returns. The bearings in the SC clutch appear to be fine as they aren't falling out or anything. And the SC clutch assy spins fine manually and seems to not have any extra play. So the officer calls me a tow truck and it is there in about 10min. Get it down to the shop and a friend meets me down there to put it inside until tomorrow when my guy can get down there and look it over.
Below is the video I took any thoughts? Again it cranks fine and had been running fine up until stopping to get the gas (Chevron always) and the noise starts after 3-5sec of being cranked. I have the new smaller SC pulley here at the house and will take down to the shop tomorrow to have them put it on see it if helps. I don't know how the internal parts work on the SC and what could be messed up inside there. Video seems to make it louder than it really is.
http://youtu.be/TULB70w7dLY?t=4s
Below is the video I took any thoughts? Again it cranks fine and had been running fine up until stopping to get the gas (Chevron always) and the noise starts after 3-5sec of being cranked. I have the new smaller SC pulley here at the house and will take down to the shop tomorrow to have them put it on see it if helps. I don't know how the internal parts work on the SC and what could be messed up inside there. Video seems to make it louder than it really is.
http://youtu.be/TULB70w7dLY?t=4s
Last edited by black06c230; 07-29-2012 at 04:57 PM.
#2
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07' SL65, 04' E55, 03' Evo8, 08' GSXR, DSM's...
That definitely sounds bad. Doesn't really sound like anything inside the engine itself so that may be some "good" news. Although i could be wrong. Hard to diagnose where a sound is coming from in a video. Does the sound stay constant while running? Sounds like possibly the supercharger. Curious if it still has any oil in it or if you have any fluid leaks near it. You wouldn't think it should be making any noise if it has no belt though. Good luck finding the actual issue and cause.
Aaron
Aaron
Last edited by WHTEVO; 07-29-2012 at 05:11 PM. Reason: Don't know how to spell.
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07' SL65, 04' E55, 03' Evo8, 08' GSXR, DSM's...
You can also seem to hear a weird sound as soon as the car does start up right before it makes the louder noise. Anything noticeable you can see further down near the crank? Again, good luck.
Aaron
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#4
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That definitely sounds bad. Doesn't really sound like anything inside the engine itself so that may be some "good" news. Although i could be wrong. Hard to diagnose where a sound is coming from in a video. Does the sound stay constant while running? Sounds like possibly the supercharger. Curious if it still has any oil in it or if you have any fluid leaks near it. You wouldn't think it should be making any noise if it has no belt though. Good luck finding the actual issue and cause.
Aaron
Aaron
Crank pulley seems to be fine with no play in it also.
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This place is a joke.
Next step is to remove (take it off don't cut it off) the accessory belt, and start the engine to see if noise is gone. Also, check your flywheel/torque converter bolts to make sure none of them have backed out.
#7
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2005 E55 AMG
Remove the accessories belt, start the car and let it run ( you can drive it if you want, just watch for coolant temps. It should give you a good 5-10 minutes of easy driving though ). If the noise goes away, check your accessories one by one.
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#8
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Keep in mind, at idle, no load or low load, the SC is not engaged. That said, it seems the noise must be coming from something other than the SC.
#10
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Thanks guys we will start with the ideas you all have thrown out there. Keep them coming and I will keep you all updated!
Thanks
H
Thanks
H
#11
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#12
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Airflow at idle when the car is not moving? I did notice that the pulley on the clutch pak appears to be spinning even without the belt on it. It seemed strange to me. Could it be airflow from the radiator fan causing it to spin?
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Yup the vac being puled by the motor. Air's gotta get in somehow
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2005 E55 AMG
At idle the engine is at vacuum because the air pressure is below atmosphere but there is a decent enough amount of air flowing to be able to feed the pistons and maintain an idle. This airflow cause the supercharger to spin.
#20
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I would use a strap wrench and put it on the SC and have someone start the car. I also hear noises WHILE cranking, before idle. curious to see what this is.
Also, the sound seems to start AS the supercharger pulley starts to spin. I am guessing SC issues. But, what would cause this to happen? You said the car was running while you fueled up, but it didnt make noises till you began to pull out of the gas station? If your like me, the SC always engages while i am pulling out of the gas station to merge into traffic. I don't see what could have caused this though.
Also, the sound seems to start AS the supercharger pulley starts to spin. I am guessing SC issues. But, what would cause this to happen? You said the car was running while you fueled up, but it didnt make noises till you began to pull out of the gas station? If your like me, the SC always engages while i am pulling out of the gas station to merge into traffic. I don't see what could have caused this though.
Last edited by 03'55AMG; 07-29-2012 at 10:43 PM.
#21
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Best method I've found for isolating a noise is buy some plastic or foam tubing from home depot a few feet long, put one end in your ear and use the other to locate the source of the noise. It acts as a bullet mic and isolates the sound. Good luck!
#23
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I would use a strap wrench and put it on the SC and have someone start the car. I also hear noises WHILE cranking, before idle. curious to see what this is.
Also, the sound seems to start AS the supercharger pulley starts to spin. I am guessing SC issues. But, what would cause this to happen? You said the car was running while you fueled up, but it didnt make noises till you began to pull out of the gas station? If your like me, the SC always engages while i am pulling out of the gas station to merge into traffic. I don't see what could have caused this though.
Also, the sound seems to start AS the supercharger pulley starts to spin. I am guessing SC issues. But, what would cause this to happen? You said the car was running while you fueled up, but it didnt make noises till you began to pull out of the gas station? If your like me, the SC always engages while i am pulling out of the gas station to merge into traffic. I don't see what could have caused this though.
#24
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Yes drove 7mi reaching 80mph on the interstate this morning to breakfast and then about .5mi to the Chevron. No noises or concerns until pulling back on to the road from the gas station. This is why I am fairly confident its something to do with the SC but just odd it still makes that much noise even with the belt cut off. And for it to suddenly start has me really confused.