Am I knocking?

metahuncho · 02-10-2026, 11:04 AM

https://youtube.com/shorts/FDIrycpoL...xzl8rM_hET0_8i

Took to the Kia dealer where I bought it to fix and oil leak exactly 1 day after I purchased the vehicle. After the fixing the leak it Started knocking the next day. They still have the vehicle. The tech admitted to not knowing BMWs well. I refuse to pick up the vehicle until the noise is completely gone. My theory is they didn’t prime the engine and starved it of oil. But im hoping im just paranoid because its a new car for me. What do you guys think??

christianb5s4 · 02-10-2026, 11:36 AM

That sounds like rod knock, unfortunately.

Elderado82 · 02-11-2026, 11:00 AM

Knock knock...

thebmw · 02-11-2026, 11:18 AM

Quote:

Originally Posted by Elderado82

Knock knock...

Q: Who's there?

A: Spun?

Q: Spun who?

A: Spun Rod Bearing.

Nice to meet you Mr. Bearing.

25 V8 IS · 02-11-2026, 01:43 PM

jefe2000 · 02-13-2026, 09:52 AM

Yeah, if you do any service that interrupts the oil supply circuit — such as fixing an oil leak at the sump or the oil filter housing — on an N55, then you must prime the oil system before starting the motor. I wouldn’t expect most techs at a non-BMW service center to know this.

More here:
https://www.fcpeuro.com/blog/bmw-si-...system-priming

02-10-2026, 11:04 AM	#1
metahuncho Registered 2 Rep 2 Posts Drives: 2016 BMW X5 35i 2013 BMW 535I Join Date: Feb 2026 Location: Florida iTrader: (0)	Am I knocking? https://youtube.com/shorts/FDIrycpoL...xzl8rM_hET0_8i Took to the Kia dealer where I bought it to fix and oil leak exactly 1 day after I purchased the vehicle. After the fixing the leak it Started knocking the next day. They still have the vehicle. The tech admitted to not knowing BMWs well. I refuse to pick up the vehicle until the noise is completely gone. My theory is they didn’t prime the engine and starved it of oil. But im hoping im just paranoid because its a new car for me. What do you guys think??
	Appreciate 0 Tweet Quote

02-10-2026, 11:36 AM	#2
christianb5s4 Major 2366 Rep 1,321 Posts Drives: Built 2001 Audi S4 Join Date: Jan 2019 Location: Newport Beach, CA iTrader: (0)	That sounds like rod knock, unfortunately. __________________ 2024 M3 CompX Dravit Grey - MP HAS - Millway - MHC+ carbon - CS ECU software + Full Suite - Fabspeed - MAD - PPF 2019 G05 X5 x40i, built 2001 600whp B5 S4.
	Appreciate 0 Quote

02-11-2026, 11:00 AM	#3
Elderado82 Lieutenant 586 Rep 507 Posts Drives: 2025 M340i XDrive Join Date: Apr 2018 Location: Lincoln, NE iTrader: (0) Garage List 2025 BMW M340i xDrive [0.00]	Knock knock... Attached Images
	Appreciate 0 Quote

02-11-2026, 01:43 PM	#5
25 V8 IS Colonel 2994 Rep 2,719 Posts Drives: 2025 Lexus IS 500 Join Date: Mar 2019 Location: Claremont, CA iTrader: (0) Garage List 2025 Lexus IS500 [0.00] 2016 Mazda CX-5 [0.00]	__________________ 2025 Lexus IS500 Infrared/Ultra White
	Appreciate 0 Quote

02-13-2026, 09:52 AM	#6
jefe2000 Captain 1320 Rep 805 Posts Drives: 2018 M2 6MT Join Date: Feb 2020 Location: San Francisco Bay Area iTrader: (0) Garage List 2018 BMW M2 [10.00]	Yeah, if you do any service that interrupts the oil supply circuit — such as fixing an oil leak at the sump or the oil filter housing — on an N55, then you must prime the oil system before starting the motor. I wouldn’t expect most techs at a non-BMW service center to know this. More here: https://www.fcpeuro.com/blog/bmw-si-...system-priming
	Appreciate 0 Quote