X5 Noise from M54 Engine - Page 2

Optllizer · #11 10-15-2021, 05:40 PM

Quote:

Originally Posted by bcredliner

Mileage changed?

Around 13.2 rn. Which seems low. Its the 3.0i

Sponsored Links

bcredliner · #12 10-15-2021, 06:02 PM

If you are driving normally, following speed limits (kinda), not towing then that would be low mileage for 3.0. Do you know if it got better mileage before you noticed the noise?

I am very hesitant to suggest nothing is wrong but so far there is not enough information to say there is. As previously suggested, I always use an auto stethoscope, a must have tool for a DIYer, to trace a noise to the source. Can purchase one at most auto part stores. Just move the probe around the engine until the sound is the loudest. Check close to the injectors and close to each cylinder. Also check the water pump. Checking at the water pump should give you an indication if the noise is coming from a pulley or tensioner but getting a close to to them without getting into the belts is better. If it is coming from the bottom of the engine you will likely hear it with a probe on the oil pan but it is better to each cylinder on the block from there. Sometimes you can narrow it down if a cylinder is involved by probing the base of the valve covers.

IMO, with something like this don't ever buy parts until by troubleshooting you feel sure you have found the issue.

Optllizer · #13 10-15-2021, 06:16 PM

Quote:

Originally Posted by bcredliner

If you are driving normally, following speed limits (kinda), not towing then that would be low mileage for 3.0. Do you know if it got better mileage before you noticed the noise?

I am very hesitant to suggest nothing is wrong but so far there is not enough information to say there is. As previously suggested, I always use an auto stethoscope, a must have tool for a DIYer, to trace a noise to the source. Can purchase one at most auto part stores. Just move the probe around the engine until the sound is the loudest. Check close to the injectors and close to each cylinder. Also check the water pump. Checking at the water pump should give you an indication if the noise is coming from a pulley or tensioner but getting a close to to them without getting into the belts is better. If it is coming from the bottom of the engine you will likely hear it with a probe on the oil pan but it is better to each cylinder on the block from there. Sometimes you can narrow it down if a cylinder is involved by probing the base of the valve covers.

IMO, with something like this don't ever buy parts until by troubleshooting you feel sure you have found the issue.

I will get the sethoscope, but i did order a disa valve cuz it looks messed up when i took it out. I did unplug it to see if the noise would go away but it didnt.

Corellian Corvette · #14 10-15-2021, 07:05 PM

I think a video might be helpful to see where the noise is coming from. Hard to pinpoint just from audio

Optllizer · #15 10-16-2021, 05:26 PM

https://youtube.com/shorts/9_DJQJYpPJQ?feature=share heres a video of my moving around the engine bay.

bcredliner · #16 10-17-2021, 07:28 PM

Remove the oil fill cap when it is running to see if there is excess vacuum. Have a rag handy to catch any oil.

Optllizer · #17 10-17-2021, 07:32 PM

Quote:

Originally Posted by bcredliner

Remove the oil fill cap when it is running to see if there is excess vacuum. Have a rag handy to catch any oil.

What do you mean by excess vaccum should I see,hear, or feel something.

bcredliner · #18 10-17-2021, 07:40 PM

Excess vacuum would be that it is difficult to remove the cap. The whistling sound will stop and you will feel how hard it is to remove.

Optllizer · #19 10-17-2021, 07:49 PM

Quote:

Originally Posted by bcredliner

Excess vacuum would be that it is difficult to remove the cap. The whistling sound will stop and you will feel how hard it is to remove.

It was really easy to take off. The engine sounded was weird when i took it off.
Here is a video
https://youtube.com/shorts/WGIjoezRAOQ?feature=share

bcredliner · #20 10-17-2021, 08:00 PM

It's so hard to identify sounds by video. It depends on how good your mic and the listeners mic are to get an accurate reproduction.

I thought it might be a vacuum issue with the rattle being a symptom but it doesn't appear that it is. It still could be a vacuum leak. Can you do a smoke test?

Have you tried the stethoscope? You can also use a long extension, anything medal, even a broomstick to locate source of rattle. If you have a paper towel center that will work also.

Sponsored Links