Dumb Question Thread - No Flaming Allowed

[Calb]

I have a BlueBus issue. I installed my BlueBus 6 months ago and absolutely love it. The 5x turn signal is great. Last week there has been a buzzing sound that matches the engine revs. I have not done anything to the car and confused as to why this is happening.
TIA

[ugaexploder]

Anybody have experience with these "aftermarket" HJS muffler hangers? https://www.fcpeuro.com/products/bmw...js-18201401797

The OE BMW ones are $85/piece and I need 3. Would much rather spend $25/piece, but won't bother if they're crap or lesser in quality from the BMW pieces. I hesitate because it says it's aftermarket, not OEM.

I'm running the HJS ones mainly because at time of purchase I didn't really understand the differences between OE, OEM, and Genuine BMW parts...but they seem to work just fine, I've had zero issues. Hard to justify $350 for all (5) exhaust bushings that are genuine BMW...

Also purchased the rogue mount but didn't install, let me know if anyone wants to buy it from me for cheap. I personally don't like the idea of the design.

[karter16]

I *think* the HJS were found to be subpar, more flexible, someone else will chime in I'm sure.
I remember going OEM but this was 3 years ago when they were likely much cheaper.

FWIW one of the Uber expensive, but very nice, Rouge Engineering mounts on PS coupled with rubber OE style mounts on the DS makes for a solid yet still compliant setup with minimal to zero NVH.

I have a SCZA muffler that would hit the EVAP casing on occasion and that is the reason I run that setup.

Can confirm the aftermarket ones are rubbish, OE is expensive but cheaper in the long run than replacing every year.


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[Cubieman]

I *think* the HJS were found to be subpar, more flexible, someone else will chime in I'm sure.
I remember going OEM but this was 3 years ago when they were likely much cheaper.

FWIW one of the Uber expensive, but very nice, Rouge Engineering mounts on PS coupled with rubber OE style mounts on the DS makes for a solid yet still compliant setup with minimal to zero NVH.

I have a SCZA muffler that would hit the EVAP casing on occasion and that is the reason I run that setup.

[ATB88]

Anybody have experience with these "aftermarket" HJS muffler hangers? https://www.fcpeuro.com/products/bmw...js-18201401797

The OE BMW ones are $85/piece and I need 3. Would much rather spend $25/piece, but won't bother if they're crap or lesser in quality from the BMW pieces. I hesitate because it says it's aftermarket, not OEM.

[bagger]

to me, that just looks like a remnant of a sticker. i feel like you should be able to just pick it off.

Hah. Wow. I never wanted to pick at it to potentially make it worse. Picked at it, and you were right - thanks! How that never came off with all the tire cleaning and stuff I have no idea. Glad I'm in the dumb question thread. Thanks!!

[L0okitzRaj]

to me, that just looks like a remnant of a sticker. i feel like you should be able to just pick it off.

[bagger]

Not sure what happened here. Been there for a while, but now it's bothering me. Should I be worried about this? Or just sharpie it and call it a day? Tires probably have like 2,000 miles on them - tops.

[Shonky]

Can somebody remind me what color wire is the 12V switched power going to the BM53 amp in the trunk? I think it's red with green stripe??

Also, anybody what gauge wire that 12V switched line is? I'm trying ton find the right size posi-connector to tap into it.

RT/GN (rot,gruen) is permanent 12V. Switched should be VI/WS aka violet/white.

[duracellttu]

Can somebody remind me what color wire is the 12V switched power going to the BM53 amp in the trunk? I think it's red with green stripe??

Also, anybody what gauge wire that 12V switched line is? I'm trying ton find the right size posi-connector to tap into it.

[Cubieman]

I was amazed at the amount of paint marker "debris" that I found on my M6 oil filter shortly after doing RB's. Probably not a big deal, but I will go a bit ligher on that next time. I just like to mark each bolt immediately after its torqued.

[Slideways]

I've heard the recommendation to do an oil change ~1200 miles after fresh rod bearings which sounds reasonable. Is there any merit to also doing one really soon (100-200 miles in) just to get all of the dirt/grit/assembly lube that found its way into the engine during the job out of there? Is that standard practice?

Reason for not changing the oil is that the oil filter will catch any debris and they didn't do a 1200 mile oil change after the recall.

[IamFODI]

I've heard the recommendation to do an oil change ~1200 miles after fresh rod bearings which sounds reasonable. Is there any merit to also doing one really soon (100-200 miles in) just to get all of the dirt/grit/assembly lube that found its way into the engine during the job out of there? Is that standard practice?

Any merit? Sure. I wouldn't expect it to change the game, but theoretically there should be some benefit.

I've heard of change schedules something like, first oil change after the first ~10 minutes of runtime, then again after a couple hundred miles, then again at ~1k miles, then whatever your normal change interval is. I'm sure I'm remembering the numbers wrong so don't take them as gospel, but you get the idea.

[ATB88]

I've heard the recommendation to do an oil change ~1200 miles after fresh rod bearings which sounds reasonable. Is there any merit to also doing one really soon (100-200 miles in) just to get all of the dirt/grit/assembly lube that found its way into the engine during the job out of there? Is that standard practice?

[ATB88]

Just lowering the subframe means that you don't need to drain the power steering system, which equals less mess and work.

To get a good plastigauge measurement, you need to do the full torque procedure. I'm willing to bet that the BMW techs at the dealership did not plastigauge measure clearances before installing the new bearings. It is not in the service bulletin - http://www.siwilson.com/BMW/Service_...20Bulletin.pdf

I did find this BMW service snippet which explains how to use plastigage to measure S54 rod bearing clearances during replacement. Since the torque sequence described is for the M11 bolts, I'm assuming that this is an "old" version of the service bulletin before they moved to the M10 bolts? This suggests to me that it was part of the dealership service procedure earlier on (or maybe for the first of the two service bulletins)? Whether or not they actually did it is another story.

The procedure does say to do a full torque sequence to do the plastigage measurement.

http://www.adkusters.dsmynas.com/Website%20mynas/TIS%20documents%20PDF%20aanvulling/11_24_571.pdf

If they actually do this at the dealership when replacing RBs, then that effectively halves the usable life of the M11 style bolts, which seems concerning.

If it's generally known that you don't have to fully torque to use plastigage properly... how much should I torque if I want to plastigage?