|
|
04-19-2018, 01:31 PM | #639 |
Colonel
2694
Rep 2,167
Posts
Drives: 2011 E92 M3
Join Date: Oct 2017
Location: Victoria
|
^^^
Wow - those look very uncool. Good thing you did the swap! What you put back in there?
__________________
2011 E92 M3 - 6MT, ZCP, ZF LSD, ESS G1, Some other goodies... |
Appreciate
0
|
04-19-2018, 01:43 PM | #640 |
Lieutenant
168
Rep 548
Posts |
Tdott, Wow... those look terrible! All of them seemed to be gouged/scratched in a narrow track in the center and very elongated wear compared to most of the the other pictures that have been posted. #8 looks like it was way ahead of the others on the road to failure. You dodged a bullet!
__________________
991.1 GT3
SOLD: e92 M3 6MT, Jet Black/Black Dinan: Software Tune | CF Intake | Exhaust | Pulley Kit | Stage 1 Suspension | Pedals /// BBS e88 18x9.5 et19; 18x10.5 et19 on PS4 265/285 /// Lux Angel Eyes |
Appreciate
0
|
04-19-2018, 01:48 PM | #641 | ||
Brigadier General
4036
Rep 4,064
Posts |
Quote:
Quote:
__________________
|
||
Appreciate
0
|
04-19-2018, 01:54 PM | #642 |
Major
759
Rep 1,262
Posts
Drives: '08 M3, '09 328xi Sport Wagon
Join Date: Oct 2008
Location: Ancaster, ON, Canada
|
I really don't think you should of installed new bearings in that engine without having that crankshaft removed and checked. If the crank oil holes weren't chamfered correctly from the factory, this isn't something you can see or feel.
I still think something is very wrong and I'm willing to bet the new bearings are junk already. I'd like deansbimmer to chime in on this.
__________________
Last edited by doogee; 04-19-2018 at 02:04 PM.. |
Appreciate
0
|
04-19-2018, 02:31 PM | #643 |
Captain
213
Rep 740
Posts |
|
Appreciate
0
|
04-19-2018, 03:10 PM | #644 |
BimmerPost Supporting Vendor
3946
Rep 2,964
Posts
Drives: 2011 E93 M3
Join Date: Nov 2014
Location: DFW, Texas
|
I think Doogee is on point with speculating oil hole chamfer causing that wear. It is very disconcerting. If he made 55k on the tight 702/703 bearings and replaced them with the extra clearance BE setup then I wouldn't hesitate to say he could at least get another 60k out of them without worry. As long as there were no defects to the surface of the crank I would say don't worry about it.
|
Appreciate
1
Assimilator1615.50 |
04-20-2018, 07:21 AM | #645 |
Lieutenant
127
Rep 424
Posts |
Here are mine. Replaced at 61k kms. They look pretty bad for the mileage imo. Torn motor mounts gave a lot of clunking and shifting problems. Some info about the car
Registered oil changes (BMW dealership): 1500 km Castrol TWS 20000 km Castrol TWS 27500 km Castrol TWS 38000 km BMW M TwinPower Turbo 10W60 47000 km BMW M TwinPower Turbo 10W60 52000 km Liqui Moly 10W60 (independent shop) ESS VT2-625 kit between ~44000 km and 50500 km. After that the engine was back to stock. As far as I know the car was not tracked. I bought it at 54000 km and took very good care since then, always proper warmup, no WOT until oil temp was around 100 C, etc. Added MoS2 at around 57000 km. I noticed the difference immediately after having the new bearings installed. Not that something alarmed me before, but the the sound engine makes on startup is night and day. It is now so smooth I can't even describe it. Before I would get an unpleasant grind (?) for less than 1s after the startup, the engine was shaking on cold start and was noisier ovarall. The starter motor sound is completely different, high pitched clean tone, before it sounded like it was struggling much more. Went with Castrol FST 10W60 and OEM bearings. Just to note why: any aftermarket bearings need to be imported form USA, which makes the price about 40% higher due to taxes and customs fees, not to mention the shipping cost. In my country, noone has even heard about any aftermarket bearings, and no reputable shop would install them for me. Besides, I believe these OEM will be good for at least 70-80k kms when maintained properly. That's about 7 years of my ownership, so no big deal if I need to replace them after that time. Assuming I will still own the car [don't mind the scratches on bearings surface - they showed up due to throwing the bearings around after disassembly, transport, etc.]
__________________
|
Appreciate
1
Assimilator1615.50 |
04-20-2018, 07:24 AM | #646 | |
Major
759
Rep 1,262
Posts
Drives: '08 M3, '09 328xi Sport Wagon
Join Date: Oct 2008
Location: Ancaster, ON, Canada
|
Quote:
None of these improvements you speak of are possible with a rod bearing swap. Especially when yours were in pretty "decent" shape. Perhaps you've never done an oil change and the motor was starting to seize?
__________________
|
|
Appreciate
0
|
04-20-2018, 07:28 AM | #647 | |
Lieutenant
127
Rep 424
Posts |
Quote:
I really didn't expect any changes after the swap, but was shocked when I started the car. It was 2 days after I left it at the shop. 100% the startup sound is completely different and quieter now, and the engine is not shaking like it used to. But maybe that's due to other things replaced - oil, motor mounts :
__________________
|
|
Appreciate
0
|
04-20-2018, 07:30 AM | #648 | |
Major
759
Rep 1,262
Posts
Drives: '08 M3, '09 328xi Sport Wagon
Join Date: Oct 2008
Location: Ancaster, ON, Canada
|
Quote:
__________________
|
|
Appreciate
0
|
04-20-2018, 07:31 AM | #649 | |
Lieutenant Colonel
804
Rep 1,575
Posts |
Quote:
Motor mounts on the other hand - sure.
__________________
|
|
Appreciate
0
|
04-20-2018, 07:32 AM | #650 | |
Lieutenant
127
Rep 424
Posts |
Quote:
I am no mechanic and didn't even know what a rod bearing was prior to owning S65 equipped car, all I can say I have noticed these things after changing parts mentioned above.
__________________
|
|
Appreciate
0
|
04-20-2018, 07:58 AM | #651 | |
Lieutenant
229
Rep 415
Posts |
Quote:
Do you mean another 60K from the old 702/703 bearings? |
|
Appreciate
0
|
04-20-2018, 08:11 AM | #652 | |
Lieutenant Colonel
804
Rep 1,575
Posts |
Quote:
I have actually read some people talk about Liqui Moly being a "noisy" oil. I don't know how true that is but that may be another factor if you switched back to Castrol or TwinPower with the new bearings.
__________________
|
|
Appreciate
0
|
04-20-2018, 08:20 AM | #653 |
BimmerPost Supporting Vendor
3946
Rep 2,964
Posts
Drives: 2011 E93 M3
Join Date: Nov 2014
Location: DFW, Texas
|
No. I mean if the original 702/703 bearings went 55k miles on a potentially "defective" crankshaft, then I don't see any reason why the new BE bearings wouldn't be able to go at least another 60k on the same "defective" crankshaft.
|
Appreciate
0
|
04-20-2018, 08:57 AM | #654 | |
Lieutenant
229
Rep 415
Posts |
Quote:
And doogee - you are saying that the reason behind the wear and tear is the oil chamfer? What makes you say so - the extent of wear and tear? Sorry if they sound stupid - just trying to gain some knowledge. |
|
Appreciate
0
|
04-20-2018, 10:35 AM | #655 |
Major
759
Rep 1,262
Posts
Drives: '08 M3, '09 328xi Sport Wagon
Join Date: Oct 2008
Location: Ancaster, ON, Canada
|
Yes the wear is not even across the bearing whatsoever. Only reason I can see this happening is from the oil passage itself. The problem with that particular motor is the crankshaft, in my opinion. We've never seen this before.
__________________
|
Appreciate
0
|
04-20-2018, 11:17 AM | #656 | ||
Brigadier General
4036
Rep 4,064
Posts |
Quote:
Actually it kinda is, the crankshalf is rotating on the bearings, perhaps the oil film isn't strong and is causing increase vibration or even contact. With the new bearings and the coating, it is possible that things are rotating more smoothly. Now is it a bit far fetched? Yes, but I can say I sat in my car after the bearings were done and heard the same, I didn't believe it, I dismissed it, after a while I was sure it was, but it's still possible. A few other friends have said the same after we did the bearings and I didn't mention anything to them about how i felt,but they said felt basically the same about their engine after. If I had the tools to measure it, maybe I'd try to quantify it if I had the chance to do another, but for now you guys can continue to call placebo, I don't care, but I know what I felt. It's minor and it's not a reason anyone should care about. Even your bad example, while not directly related can be explained by science. After filling gas, the car could have cooled down, no longer heat soaked and running cooler, maybe the fan was stuck and only kicked on after restarting, or the temperature could have dropped also. Basically there are variables that may not be directly related to your poor attempt at an analogy, but could impact the situation of causing the AC to run cooler after filling gas. Both can be hard to prove, but it's not outside the realm of possibilities. Quote:
__________________
Last edited by tdott; 04-20-2018 at 11:26 AM.. |
||
Appreciate
0
|
04-20-2018, 11:39 AM | #657 | |
Major
759
Rep 1,262
Posts
Drives: '08 M3, '09 328xi Sport Wagon
Join Date: Oct 2008
Location: Ancaster, ON, Canada
|
Quote:
Even if that were true, the balancer would wash any of these "feelings" away.
__________________
|
|
Appreciate
1
Iyzmi804.00 |
04-20-2018, 11:44 AM | #658 | |
Lieutenant Colonel
804
Rep 1,575
Posts |
Quote:
You really read into my analogy more than intended, and yet missed that I said changing to a different brand of gas, not filling up gas. The analogy was meant to point out that bearings have about as much relation to the sound of an engine as the brand of gas you use to the temperature of your AC (none). Is your next point going to be that BP makes your AC run cooler than Shell?
__________________
|
|
Appreciate
0
|
04-20-2018, 02:22 PM | #659 |
Brigadier General
4036
Rep 4,064
Posts |
Iyzmi
If a bearing has no impact on how smooth an engine runs or the sound it makes, where do you think rod knock comes from?
__________________
|
Appreciate
0
|
04-20-2018, 03:06 PM | #660 | |
Lieutenant
127
Rep 424
Posts |
Quote:
Not trying to argue or prove my point, just want to understand how all this works.
__________________
|
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|