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06-30-2018, 04:38 PM | #1 |
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Yesterday afternoon I went to start my car and heard a knocking sound. At first I thought it was an exhaust leak or exhaust rattle so I checked under the car but it sounded like it was coming from the engine bay/header area. Popped the hood and clearly heard a knock sound, took my phone out really quick to reference with video back and turned the car off. Car was running for about 3 minutes. Last time I drove the car was Wednesday, 2 days prior and I did not hear anything related to anything you hear in the video. I immediately sent the video to a few local shops here in San Diego and called Malek at MRF. Everyone told me to not drive he car and to have it towed to the shop. I decided to have it towed to MRF Engineering last night as I believe if anyone can tell me if this is savable it will be him. If anyone has any advice in this situation or had a similar problem and what their outcome is. The way I look at it from talking to Malek, either it can be saved and a simple bearing job is needed or the crank is damaged and at that point a rebuild or new engine is necessary.
History on the car: 2010 BMW M3 Coupe. 101,000 miles. 3rd owner, owned it since 65,000 miles. Car was purchased with a stack full or service and maintenance records. Very well maintained. I did oil changes with liqui moly 10w60 every 7,000 miles. I performed an oil change at 100,000 miles ago so just recently about 2 weeks ago. Mods: stock x pipe with primary and secondary cat delete. Gintani e85 tune. Been running this tune for about 1-2 months, really hoping it's not related. Update: Malek texted me this morning saying that based on his preliminary diagnosis, he believes I'm getting bottom end rod knock. He said it's not terrible yet, so it might be savable. It is ether rod knock or main bearing failure. He said he will be inspecting the oil next. I'll keep everyone updated. Update #2: Malek pulled the oil pan and found that none of the bearings spun. They were severely damaged but nothing spun. He looked at the crank, pistons, cylinder walls and nothing was damaged. He looked at the main bearings and they looked fine. He said usually when main bearings start failing you will see a blue hue to them and he did not see that upon inspection. He said I am very lucky and to buy a lottery ticket lol he will be proceeding with a bearing change. I will post a picture of my bearings they look terrible lol. Last edited by codinge90; 07-10-2018 at 03:56 PM.. |
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06-30-2018, 04:50 PM | #2 |
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I'm 100% sure , your situation is rod knock !
You're spot on with Malek It's #reallysucks ! But I wish you the best of luck ..
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06-30-2018, 05:43 PM | #3 |
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High mileage E9x M3 and you decided not to do your rod bearings? Big no, no.
I had 36,000 miles on mine and the rod bearings looked like ass when they came out of the engine.
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06-30-2018, 06:04 PM | #4 | |
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Unfortunate event regardless though |
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06-30-2018, 07:27 PM | #7 |
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Yes . But not for a long time ...And when driven it's usually followed by a black hole !
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06-30-2018, 07:52 PM | #8 | |
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06-30-2018, 08:18 PM | #9 | |
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06-30-2018, 08:28 PM | #10 |
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I agree with you guys but you have to understand that any thread with a similar issue like mine is people non stop posting asking why the bearings weren't changed. How does this help my situation? I completely agree the issue is relevant and possibly getting worse as time goes on but in my thread you can clearly see my intentions for responses were more on line with anyone that has had a similar issue and what their outcome was. Was engine able to be saved? Was a simple bearing job necessary? Was the engine replaced? If so, how much was the total cost and how long was the car out?
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07-01-2018, 08:35 AM | #11 |
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Your car is in good hands. Good luck.
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07-01-2018, 08:58 AM | #12 |
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07-01-2018, 12:38 PM | #13 |
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I feel like I've had this noise before, very similar consistent tapping sound after a long drive and heard it while idling. But now it's gone. Is it possible I can have a similar engine issue? I've already swapped my rod bearings
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07-01-2018, 12:50 PM | #14 |
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Negative ! Once you get rod knock , it goes never away .Only worse ! And your S65 is RIP !
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07-01-2018, 01:19 PM | #15 | |
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07-02-2018, 01:05 PM | #16 | |
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Good luck and you have the car in a superb shop and if anyone can save it, it's Malek.
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07-02-2018, 02:13 PM | #17 | ||
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07-02-2018, 03:08 PM | #18 |
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Also if anyone wants to chime in and let me know how much they think my car would sell for with rod knock? I'll post some pictures up as it's atheistically very modded, probably won't affect the price very much. Can't find anything online with either a blown engine or rod knock engine so I don't know how it'd be priced.
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07-02-2018, 04:33 PM | #20 | |||
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07-02-2018, 04:39 PM | #21 | |
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Selling the car in this condition would not be remotely close to ideal for you. Maybe better parting the car out. If you can swing it, it's best to repair it and enjoy the car a few years longer than you may of normally.
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07-02-2018, 04:42 PM | #22 | ||
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