BM3 stage 1 engine rattle n20

misayan · 07-14-2019, 08:38 PM

Hi guys new to this forum, I was hoping someone can have an idea of what's going on here. Rattling happens when the engine is warm, most prominent when revving to 2-3k rpm when in park. Mostly happens while driving at low speeds in the city (20-30 mph) and when letting go of the accelerator. The noise tends to echo off parked cars. Bought the car used and has 52k miles, only had the tune for 2k miles. No check engine light. I don't have an exhaust flap/valve in the back and the sound comes from the engine bay.

Few mechanics looked at it and said it was the lifters without much thought and recommend getting a new engine.

Rattling is loudest around the last 5 seconds of the video. All I had done was a BM3 stage one and muffler + res delete. The car is now flashed back to stock tune. Any thoughts?

https://www.youtube.com/watch?v=V-9trzYdtQQ

Okhan19 · 07-14-2019, 09:10 PM

Unfortunately that sounds like rod bearings

Solidjake · 07-14-2019, 10:28 PM

Damn that sounds bad....

sspade · 07-14-2019, 10:58 PM

Aye caramba... sounds bad.

Since you're under 70k take it to dealer and tell them you're scared its the timing chain.

They will have a look and give you an accurate prognosis... hopefully for free.

Make sure to report back with findings.

RMachuca3d · 07-15-2019, 01:53 AM

Quote:

Originally Posted by sspade

Aye caramba... sounds bad.

Since you're under 70k take it to dealer and tell them you're scared its the timing chain.

They will have a look and give you an accurate prognosis... hopefully for free.

Make sure to report back with findings.

Can tell you right now they wont cover the diagnosis, unless it is timing chain and he has the EW on it, but it isnt.

Sounds pretty bad tbh, best bet might be to buy a complete engine for ~2k and have them swap it in.

rjd_F30 · 07-15-2019, 04:26 AM

That thing sounds like it's about ready to give up, sorry to tell you.

If it's only at 52k, depending on what year, hopefully you may still be in a warranty period? That would be the first thing I look into... If not, you're probably looking at a new engine out of pocket.

kmuthappa · 08-07-2019, 06:10 AM

By how you are describing it, it seems similar to an issue a master BMW tech described as waste gate failure. Pop your hood open and look to the left of your engine block, you might see a loose connector.

The waste gate releases excess boost or pressure generated by the turbo that is not needed by the engine, (caused by deceleration) so maybe that is the cause. Good luck man. Or just goto a tuner and have them rebuild the engine

jordan35i · 08-07-2019, 03:53 PM

Keep us updated. Did this first happen after you installed BM3?

WouterF30 · 07-15-2022, 02:56 AM

Hey, new here but I have the exact same terrible sound. Did you ever find out? really worry its my lifters..

07-14-2019, 08:38 PM	#1
misayan Registered 4 Rep 2 Posts Drives: F30 BMW 320i Join Date: Jul 2019 Location: Los Angeles iTrader: (0)	BM3 stage 1 engine rattle n20 Hi guys new to this forum, I was hoping someone can have an idea of what's going on here. Rattling happens when the engine is warm, most prominent when revving to 2-3k rpm when in park. Mostly happens while driving at low speeds in the city (20-30 mph) and when letting go of the accelerator. The noise tends to echo off parked cars. Bought the car used and has 52k miles, only had the tune for 2k miles. No check engine light. I don't have an exhaust flap/valve in the back and the sound comes from the engine bay. Few mechanics looked at it and said it was the lifters without much thought and recommend getting a new engine. Rattling is loudest around the last 5 seconds of the video. All I had done was a BM3 stage one and muffler + res delete. The car is now flashed back to stock tune. Any thoughts? https://www.youtube.com/watch?v=V-9trzYdtQQ
	Appreciate 2 sspade2464.50 Tweet Quote

07-14-2019, 09:10 PM	#2
Okhan19 Enlisted Member 26 Rep 40 Posts Drives: 328I 2015 ATM rktune downpipe Join Date: Apr 2018 Location: Jamaica iTrader: (0)	Unfortunately that sounds like rod bearings
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07-14-2019, 10:28 PM	#3
Solidjake ¯\_(ツ)_/¯ 945 Rep 1,762 Posts Drives: '13 328i Msport 6MT Join Date: Jun 2009 Location: NYC/SNJ iTrader: (2)	Damn that sounds bad.... __________________ Tensioner/belt DIY \| Side skirt extension DIY Apex SM-10/DWS06+ \| 400m/X-ice Xi3 \| Injen Exhaust \| Stoptech SS Lines \| 335 Front Brakes Hawk HPS 5.0 \| RBF600 \| ER Charge Pipes \| Wagner Evo Comp 2 FMIC
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07-14-2019, 10:58 PM	#4
sspade Major General 2465 Rep 5,457 Posts Drives: F30 Join Date: Oct 2017 Location: Stevenson, WA iTrader: (3) Garage List 2016 BMW 320i [7.87] 2014 BMW 328i [6.83]	Aye caramba... sounds bad. Since you're under 70k take it to dealer and tell them you're scared its the timing chain. They will have a look and give you an accurate prognosis... hopefully for free. Make sure to report back with findings.
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07-15-2019, 04:26 AM	#6
rjd_F30 Brigadier General 2000 Rep 3,679 Posts Drives: 2013 335i 6MT Join Date: Jun 2017 Location: New Jersey iTrader: (0)	That thing sounds like it's about ready to give up, sorry to tell you. If it's only at 52k, depending on what year, hopefully you may still be in a warranty period? That would be the first thing I look into... If not, you're probably looking at a new engine out of pocket. __________________ Instagram: rjd_f30 \| Current: EBII 2013 335i 6MT RWD & Sprint Blue 2008 Audi RS4 \| Retired: 2013 328i, 2000 XTerra, 2022 Civic Si \|
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08-07-2019, 06:10 AM	#7
kmuthappa New Member 23 Rep 20 Posts Drives: BMW 3 Sportwagon bm3-2, BMW X5 Join Date: Mar 2019 Location: Maine, USA iTrader: (0)	By how you are describing it, it seems similar to an issue a master BMW tech described as waste gate failure. Pop your hood open and look to the left of your engine block, you might see a loose connector. The waste gate releases excess boost or pressure generated by the turbo that is not needed by the engine, (caused by deceleration) so maybe that is the cause. Good luck man. Or just goto a tuner and have them rebuild the engine
	Appreciate 0 Quote

08-07-2019, 03:53 PM	#8
jordan35i Second Lieutenant 98 Rep 206 Posts Drives: 340i Join Date: Mar 2018 Location: LA iTrader: (0)	Keep us updated. Did this first happen after you installed BM3?
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07-15-2022, 02:56 AM	#9
WouterF30 Registered 0 Rep 2 Posts Drives: BMW F30 328i, Mazda MX5 1.8 Join Date: Jul 2022 Location: Netherlands iTrader: (0)	Hey, new here but I have the exact same terrible sound. Did you ever find out? really worry its my lifters..
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