What could this noise be? - North American Motoring

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What could this noise be?

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  #1  
Old 07-23-2018, 07:26 AM
cavaliers60
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What could this noise be?

Recently, Iíve noticed a strange rattling like noise coming from the front drivers side of the car. Happens only when accelerating. Any ideas on what it may be? Video link to noise:

 
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Old 07-23-2018, 12:13 PM
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Might be supercharger related since it didn't seem to start until you were in boost. How many miles on your car?
 
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Old 07-23-2018, 12:20 PM
cavaliers60
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Car has 147,000 miles. Not sure when or if it has ever been serviced
 
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Old 07-27-2018, 02:13 PM
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I think itís transmission related.... and Iím not liking that... itís getting worse and today, I noticed some sort of black liquid on the bottom of it.... sooo, fml
 
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Old 07-27-2018, 02:34 PM
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On this picture, brown is the engine oil, and the dark grey is what I wiped off of the transmission....



 
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Old 07-27-2018, 02:59 PM
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Which MINI do you have?

Which transmission do you have on your MINI?
Auto, Midlands 5-speed, Getrag 6-speed?

Can you see where on the transmission it's coming out?
Is it leaching out via one of the two axle output seals?
Does the transmission have the proper amount of gearbox oil in it?
 

Last edited by AoxoMoxoA; 07-27-2018 at 03:04 PM.
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Old 07-27-2018, 03:06 PM
cavaliers60
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Originally Posted by AoxoMoxoA View Post
Which transmission do you have on your MINI?

Can you see where on the transmission it's coming out?
Is it leaching out via one of the two axle output seals?
Does the transmission have the proper amount of gearbox oil in it?
6 speed manual trans. I canít tell where itís coming out but the area behind the trans looks saturated with the fluid. Iím not sure how to check the levels as I donít see a dip stick or a resovour for the fluid. If I can figure out how to add fluid, I want to try that and at least see if that gets rid of the noise and go from there.

Car shifts and drives just fine. The rattling noise is only when you mash on the gas.
 
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Old 07-27-2018, 03:07 PM
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I know itís not the oil as it is brown in color. Power steering fluid is clear as the brake fluid.
 
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Old 07-27-2018, 03:16 PM
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Originally Posted by cavaliers60 View Post
Iím not sure how to check the levels as I donít see a dip stick or a resovour for the fluid. If I can figure out how to add fluid, I want to try that and at least see if that gets rid of the noise and go from there.
Check out THIS tutorial from Pelican... Easy Peasy.
 
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Old 08-10-2018, 02:45 PM
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After having the car serviced (supercharger oil change and 16% reduction pulley with colder spark plugs installed, one ball exhaust mod, thermostat housing replaced) I am still getting the noise in the video above. It sounds like itís getting worse and the mechanic mentioned hearing what he called ďSpark knock.Ē So Iím trying to figure out is this a timing issue where I need the crank pulley replaced? Or is there a timing chain or whatever that needs replaced? Or do I replace both? Iím not familiar with timing chains or how to tell if a car has one.
 
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Old 08-10-2018, 07:11 PM
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Check your tensioner & damper.
 
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Old 08-10-2018, 07:30 PM
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Originally Posted by minsanity View Post
Check your tensioner & damper.
tensioner looked good. At least, it didnít feel weak, and the bushings looked good. Seems to start making the noise under load right around 3500 RPM. I can hear a definite clicking sound. I am confident it may very well be the crank pulley.
 
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Old 08-10-2018, 08:27 PM
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Originally Posted by cavaliers60 View Post


tensioner looked good. At least, it didnít feel weak, and the bushings looked good. Seems to start making the noise under load right around 3500 RPM. I can hear a definite clicking sound. I am confident it may very well be the crank pulley.
The tensioner strut may look good even when gone.
 
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Old 08-12-2018, 11:42 AM
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So I took it out for a drive this afternoon, and Iím questioning if it is indeed spark knock. I donít get the noise if Iím in nuetral and rev the motor, but it happens when driving. Istill think itís somewhere around the trans. A lot of times when I try to downshift, it doesnít want to go into first or second. I have to release the clutch and press it again in order for me to shift into first. Same goes for reverse at times, or getting out of reverse and going into first.

Also do at times, if Iím in nuetral and I release the clutch, I get a rattling noise. Iím wondering if all of this is related, and is my problem.

hereís some video clips I took of the car.



 
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Old 08-13-2018, 10:20 AM
cavaliers60
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Took the mini out for a drive with a mechanic and he was able to notice some noise that I was unable to hear alone. A small clicking sound once the car starts moving that kind of progresses as the car speeds up. Then, the noise I hear appears. So he felt it is not spark knock as the other mech said. Hoping for something relatively simple to fix.
 
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