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04-05-2021, 07:49 AM | #199 |
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I never said main bearings! (they don't knock like that when they go).
And how the hell can you know that from an 11s video!? (for this car, not yours!). You can't, you're jumping to conclusions with hardly any info, you're the one who should be stoned and kicked out the forum! I already mentioned that cam follower/lifter noise is a possibility in my 1st reply to him. And he only mentioned in his 2nd post that it had been doing it for 5k miles, so yes, much more likely to be followers, not rod bearings, but you can't be 100% about it! 99%? Maybe! Oil pick ups vibrating?? Lmao, what are you talking about? Do you actually know anything about engines?? If they'd been flapping around that much to make that kind of noise they would have fallen off a long time ago, not to mention it wouldn't be rhythmic anyway.
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Oil analysis for finding wearing rod bearings?. Collation of oil analysis reports with some rod bearing photos for the M3's S65. My categorisation of pulled rod bearings in the rod bearing condition thread. My updated 'Blown engines' list. Last edited by Assimilator1; 03-02-2024 at 08:01 AM.. |
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04-05-2021, 05:02 PM | #200 | |
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And here is the video with revving the engine to about 3k Forgot to mention - rod bearings were done about 2k ago. Last edited by ffyntik; 04-05-2021 at 05:19 PM.. |
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04-05-2021, 07:53 PM | #201 | ||
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04-05-2021, 08:22 PM | #202 | |
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alright i know what im gonna do my next day off now)))) |
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04-06-2021, 12:26 AM | #203 | ||
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04-06-2021, 01:22 PM | #204 |
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Yea that does sound quite different, but also it was harder to pick out the sound from other noises (I'm not very good at honing in on 1 noise).
It did sound like the noise was happening on the falling revs as well as rising, so I doubt it is rod bearings (plus you said you've had them done). My money would be on a noisy cam follower still as it seems to be a rhythmic noise, but it's certainly worth checking the items that Scrippy mentioned (especially seeing as they're much easier to check!). Keep us posted
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Oil analysis for finding wearing rod bearings?. Collation of oil analysis reports with some rod bearing photos for the M3's S65. My categorisation of pulled rod bearings in the rod bearing condition thread. My updated 'Blown engines' list. |
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04-06-2021, 08:43 PM | #205 |
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04-27-2021, 09:26 PM | #206 |
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Alright, had a chance to take the belt off and the sound is gone
so now have to figure what caused it. Btw the belt has some damage could it make that sound? and here are two wideos and |
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04-29-2021, 02:59 AM | #207 |
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Power steering pump... odd noise, but yeah that's not right, oh and you know this but that belt is shot. Really nice detective work, Cheers!
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04-29-2021, 02:19 PM | #208 |
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Hmm, interesting, I wouldn't have thought a damaged belt would make that noise (other damaged belts I've come across haven't), but seeing as you need a new anyone anyway, you just as well try it with a new belt to see if it makes any difference.
PAS pump is a good candidate now, but try the belt 1st anyway.
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Oil analysis for finding wearing rod bearings?. Collation of oil analysis reports with some rod bearing photos for the M3's S65. My categorisation of pulled rod bearings in the rod bearing condition thread. My updated 'Blown engines' list. |
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04-29-2021, 05:56 PM | #209 |
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i ordered a belt and tensioner at this moment. should arrive soon. will try to replace one thing at a time and see what happens. will keep you posted guys. if not will order a PS pump
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05-01-2021, 11:41 PM | #210 |
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Add mine to the list of cars with this irritating random tick/click noise. Recently did an oil change with Castrol 10W-60 as usual, and almost right after is the first time I heard it. It's not as severe as some of the others I've heard - I mostly only hear it as I start to roll out in first gear or immediately after I put it in neutral and the RPMs drop to near idle. I can get it to happen at idle by very lightly tapping the throttle to get the revs up to 1000 or so, but it's so intermittent and unpredictable. Also as others have noted, only happens when the car is fully warm. Interesting observation - when I drive the car hard, then park and shut it off for enough time for the exhaust to cool, then start it back up, the tick is gone, even after the oil gets back up to temp (which happens more quickly than if I were to start it cold in the morning). The tick then only returns after driving around for a bit. That's kind of making me think it has more to do with engine/exhaust heat than oil heat.
I may try Redline for next oil change. I've never used it before - anyone know what's the best weight to use? |
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05-04-2021, 11:28 PM | #211 | |
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Replacing the belt did help! No more sound. I’m happy. It’s time to put everything back together now. |
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05-05-2021, 12:44 PM | #212 |
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Interesting! Must have been due to the damage in just a small area. Maybe a stone got caught in there?
Thanks for the update anyway, glad it was a cheap fix .
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Oil analysis for finding wearing rod bearings?. Collation of oil analysis reports with some rod bearing photos for the M3's S65. My categorisation of pulled rod bearings in the rod bearing condition thread. My updated 'Blown engines' list. |
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05-10-2021, 09:14 AM | #213 | |
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05-10-2021, 03:49 PM | #215 |
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He later found his belt was damaged, if yours is making the same noise when running maybe yours is too?
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Oil analysis for finding wearing rod bearings?. Collation of oil analysis reports with some rod bearing photos for the M3's S65. My categorisation of pulled rod bearings in the rod bearing condition thread. My updated 'Blown engines' list. |
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05-10-2021, 06:02 PM | #216 | |
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Actually the noise I'm having is a high pitch screeching noise, kinda like a slipping belt, but only while giving it more than half throttle after the engine is fully warm. Replaced belts and tensioners and idler but still there. Got new tensioner pulleys to install soon but otherwise I have no idea what it may be. |
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05-10-2021, 10:04 PM | #217 | |
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And yea, the belt was making the noise in my case. Not the steering pump |
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07-20-2021, 02:10 PM | #219 |
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Still 10w-60?
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Oil analysis for finding wearing rod bearings?. Collation of oil analysis reports with some rod bearing photos for the M3's S65. My categorisation of pulled rod bearings in the rod bearing condition thread. My updated 'Blown engines' list. |
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08-14-2021, 02:38 PM | #220 |
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Hello all!
I made an account just to reply to this thread, I'll keep everyone updated until this issue is fully resolved So far the diagnostic by the shop is as follows: 1. Definitely not rod bearing failure 2. Sound isn't coming from the internal parts of the engine 3. Sound appears to be coming near the intake manifold area This is the preliminary comments on the sound, I will be bringing my car back to the shop next week, to which they'll be taking off the plenum to further inspect where the sound might be coming from To avoid any confusion, this is the sound I'm referring to: A little info about my car: -2010 E92 M2 (Pre LCI) -Currently at 14k miles -Been using Liqui Moly 10W60 Hope this helps and I'll keep everyone posted! |
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