[rlesko]

I'm dropping the subframe to replace my oil pan gasket and I want to make sure I'm not forgetting anything. I want to get everything within reason while I'm down there. The car is a '12 335i RWD with 107k miles.

Engine Mounts-

• Left (generic) 22116787659
• Right (M sport, 99% sure this will fit) 22116855458

Oil Pan-

• Oil Pan Gasket - 11137600482
• Oil Pan Bolt Set - 11132210959
• N55 Performance Baffle - this is probably 'overkill' for my applications but I'd rather have the peace of mind putting it in now
• Rod Bearings - I'm planning to skip these. Weary of taking the engine apart that much and I've owned the car for the past ~70k miles so I know its been up on maintenance and hasn't been driven poorly etc. This is an area I'm really looking to solicit some feedback on.
• Any oil lines that I should refresh while I'm down here? Wasn't planning to mess with the turbo

Suspension

• Sway Bar + bushings (Leaning towards H&R 28mm right now but will leave specifics to sway bar selection to other threads)

Cooling-

• My water pump unexpectedly died less than 2k miles ago so I know its good now... But perhaps worth refreshing some hoses underneath here while access should be easier?

Thanks!

[johnung]

I read through quickly the engine mount post If yours is an F30 335i RWD, I don’t quite understand the benefit of a different engine mount that what’s in realoem. See photo. You’re likely to find the stock engine mount worn from age and replacement with the same part will make a big difference.

Which oil pan baffle are you getting? Many require careful welding inside the oil pan to install.

Here’s a good front sway bar video from FaRKle in case it helps
https://youtu.be/dLqnT1rWg20

[thejeremyman9]

Already discussed in detail here: https://f30.bimmerpost.com/forums/sh....php?t=1893538

[rlesko]

Originally Posted by johnung

I read through quickly the engine mount post If yours is an F30 335i RWD, I don’t quite understand the benefit of a different engine mount that what’s in realoem. See photo. You’re likely to find the stock engine mount worn from age and replacement with the same part will make a big difference.

The 'right' one is on realOEM https://www.realoem.com/bmw/enUS/sho...89#22116855458

I want this one because I have bigger brakes (upgraded rear) and the fact that it is for M sport presumably means it is more stiff/durable. There is an off chance it doesn't fit my subframe, but I can't imagine that F30 m sport vs regular had different subframes. I understand the M2/3/4 engine mounts not fitting, but just the 'M sport one'!?

Originally Posted by johnung

Which oil pan baffle are you getting? Many require careful welding inside the oil pan to install.

This is the only one I know of actually, and since its bolt on it should go in smoothly.

https://www.turnermotorsport.com/p-4...ed-sump-plate/

Any thoughts on any oil or coolant lines down there?

[AmuroRay]

Originally Posted by rlesko

The 'right' one is on realOEM https://www.realoem.com/bmw/enUS/sho...89#22116855458

I want this one because I have bigger brakes (upgraded rear) and the fact that it is for M sport presumably means it is more stiff/durable. There is an off chance it doesn't fit my subframe, but I can't imagine that F30 m sport vs regular had different subframes. I understand the M2/3/4 engine mounts not fitting, but just the 'M sport one'!?



This is the only one I know of actually, and since its bolt on it should go in smoothly.

https://www.turnermotorsport.com/p-4...ed-sump-plate/

Any thoughts on any oil or coolant lines down there?

Didn't Pussiwillow confirm the driver side M fits, but the passenger side needs modification - hence the Msport?

Don't do inserts.

[rlesko]

Originally Posted by AmuroRay

Didn't Pussiwillow confirm the driver side M fits, but the passenger side needs modification - hence the Msport?

Don't do inserts.

Pussiwillow said he used M2 mounts P/N 22117855818 for F80 Chassis, NOT 'M sport' ones specifically for F30 chassis.

[johnung]

Originally Posted by rlesko

This is the only one I know of actually, and since its bolt on it should go in smoothly.

https://www.turnermotorsport.com/p-4...ed-sump-plate/

Any thoughts on any oil or coolant lines down there?

Please give me the last 7 digits of your VIN. I’m trying to figure out why your realoem page is different than the one that I looked up for your car.

ALL F30 335i’s have “M Sport” P337A or S2NHA brakes, so it’s weird that realoem is listed this way. For this car there shouldn’t be any other option.

“M Sport” is a BMW marketing term that they slap all over the place. It’s very important to understand the context in which it’s being used. Sometimes it means something and other times it’s meaningless.

Please give me your last 7 to try to figure it out. It might save you a problem during installation .

[rlesko]

Originally Posted by johnung

Please give me the last 7 digits of your VIN. I’m trying to figure out why your realoem page is different than the one that I looked up for your car.

ALL F30 335i’s have “M Sport” P337A or S2NHA brakes, so it’s weird that realoem is listed this way. For this car there shouldn’t be any other option.

“M Sport” is a BMW marketing term that they slap all over the place. It’s very important to understand the context in which it’s being used. Sometimes it means something and other times it’s meaningless.

Please give me your last 7 to try to figure it out. It might save you a problem during installation .

I will have a 'regular' right engine mount on hand for the installation and return the 'sport' one if it does not fit. You are welcome to try and figure out what is going on - NN67693

From what I can see, I have subframe part number 31106866983. Working backwards from 'M sport engine mount' (NOT M2 mount) P/N 22116855458 , the same subframe part number appears here if you navigate over to the front axle.

[Jvac]

Turbo oil feed and return lines and associated seals are pretty cheap. Replacement is quite simple with the subframe off and the oil drained already, so maybe have those handy given your mileage and swap if you find they're leaking. It's difficult to see them from above or below when everything is in the way. Additional oil cooling is quite pricy and not worth the investment unless this is a heavy-duty track car

[rlesko]

Originally Posted by Jvac

Turbo oil feed and return lines and associated seals are pretty cheap. Replacement is quite simple with the subframe off and the oil drained already, so maybe have those handy given your mileage and swap if you find they're leaking. It's difficult to see them from above or below when everything is in the way. Additional oil cooling is quite pricy and not worth the investment unless this is a heavy-duty track car

Would you swap even if it’s not leaking? Good idea though, thank you!

[Jvac]

Originally Posted by rlesko

Would you swap even if it’s not leaking? Good idea though, thank you!

Me, probably not. But, I have half the miles you do. This is hopefully the last time you're going to have your front end torn down this far, so at least take a look. If they aren't leaking by now, I'd say leave them alone. But, like most other oil parts on a BMW engine, I'd bet they're leaking at least a little lol.

[johnung]

MYSTERY SOLVED!
Okay, I think I figured out the history of this so-called “M Sport” Right Engine Mount for the F30 335i RWD.

The resources used were Realoem and GetBMWParts websites, and my Bentley shop manual. I always pull part number from Realoem first. Later I look them up in GetBMWParts website because it is an actual BMW dealer parts website. Realoem can have me thinking that a certain part number is correct, but the GetBMWParts could tell me that part is no longer available and was replaced by another part number. The Bentley Manual sometimes shows me that diagrams in Realoem are misleading.

For those who don’t know BMW factories have a history of doing weird stuff when models are changing over or LCIs are happening. Realoem can say that a car has one part number but when a mechanic removes that part, it could have a different part number.

My speculation is that if new parts arrive for a new model and the factory has run out of the old parts, they just start installing newer part numbers in old models. Maybe it’s planned and other times not planned. Sometimes it appears like they ran out of a new part so the just grabbed an old part out of inventory and installed it in a new model car. This is their quick solution to Just-In-Time Inventory startup problems with a new model.

This happened a lot when BMW cut over from the N55 PWG engine to the N55 EWG engine around July of 2013. Both the existing F30 335i’s and the new model F32 435i’s were supposed to get N55 EWG engines. Well all of the 435i’s did, but when they had any parts availability issues the factory did weird things with the 335i. Any 335i/ix built around that date often needs a visual inspection for certain parts to see which parts the factory actually installed.

Your F30 335i RWD (VIN NN67693) has a build date of March 2012. The E90 335i RWD was built through October 2011. The F30 335i RWD began being built in April 2011. So there was actually a 7 month overlap where both E90’s and F30’s were being built and there are many parts shared between the two.

With your car having been built only 4-5 months after the overlap ended, I tried to research and not assume anything.

From the beginning of the F30 335i RWD in April 2011, until your car was built in March 2012, and through June 2012 below are the Engine Mounts that were installed on this model.

LEFT 22116787659
RIGHT 22116855460

In July 2012, the factory began to install a different right engine mount on the F30 335i RWD. This didn’t appear to be part of a larger LCI. Maybe this part hadn’t made it through development and testing for the April 2011 F30 release? Or maybe BMW spotted something in the early built models that caused the change? It doesn’t really matter.

So in July of 2012 BMW began installing in all F30 335i RWD cars, the right engine mount part number 22116855458.

Starting with July 2012 is when that crazy “M Sport brake P337A/S2NHA” reference began in Realoem. There is no logical reason why Brembo brakes on the front of the car would technically require a different engine mount. After all, all the previous cars built from 04/2011 to 06/2012 all had Brembo front brakes too. Every F30 335i/ix ever built has Brembo front brakes.

It appears that this new right engine mount began to be installed at the factory in July 2012. Whomever was updating the database that became Realoem had to find a way to indicate that. Someone must have said “Hey, all F30 335i RWD cars have either brake code P337A or S2NHA, so we’ll use that as the differentiator to install the new Right Engine Mount 22116855458.

Still concerned about the BMW issues that I mentioned above, I also compared the related Right Engine Mount related parts like the mounting bracket, the subframe and the fasteners used to connect them. According to Realoem all of those parts are identical in build months 03/2012, 06/2012 and 07/2012 when the new right engine mount began.

So the newest right engine mount that you are calling “M Sport” (but it really is not) should just bolt-on in place of the original earlier right engine mount installed at the factory.

When you install it maybe take side by side photos of both right mounts to see if there are any obvious changes. This whole thing could just be a change over to a new supplier with a different process or materials, in which case old & new may look identical. I have seen old engine mounts that have compressed to half of their original size over time.

I enjoy a good Sherlock Holmes puzzle. Hope this helps!.

[rlesko]

Originally Posted by Jvac

Turbo oil feed and return lines and associated seals are pretty cheap. Replacement is quite simple with the subframe off and the oil drained already, so maybe have those handy given your mileage and swap if you find they're leaking. It's difficult to see them from above or below when everything is in the way. Additional oil cooling is quite pricy and not worth the investment unless this is a heavy-duty track car

So to put this discussion into part numbers, are these what you are referring to?

Originally Posted by johnung

MYSTERY SOLVED!
Okay, I think I figured out the history of this so-called “M Sport” Right Engine Mount for the F30 335i RWD.

...

I enjoy a good Sherlock Holmes puzzle. Hope this helps!.

Quite the investigative work there Johnung! I will take some pics and report back here once I receive and inspect all the parts!

[Jvac]

Originally Posted by rlesko

Quite the investigative work there Johnung! I will take some pics and report back here once I receive and inspect all the parts!

Yes sir and the o-rings. If ever they were going to be replaced, this is the logical time. You could always return the parts if unused.

[rlesko]

Anyone proactively replaced hose 11537594319 or 11537628010 ?

https://www.realoem.com/bmw/enUS/sho...diagId=11_5169

[johnung]

Originally Posted by rlesko

Anyone proactively replaced hose 11537594319 or 11537628010 ?

https://www.realoem.com/bmw/enUS/sho...diagId=11_5169

Replace these and upgrade to aluminum Mickey Mouse flange.

[rlesko]

Hi johnung , thanks for the recommendations. I have replaced all those except the crankcase vent hose. Any idea on the coolant hose I linked? Particularly interested in hoses which will have better access with the subframe off.

[Jvac]

Originally Posted by rlesko

Hi johnung , thanks for the recommendations. I have replaced all those except the crankcase vent hose. Any idea on the coolant hose I linked? Particularly interested in hoses which will have better access with the subframe off.

Access to water pump and hoses is definitely easier with subframe out of the way too. I spent a lot of time sitting underneath my engine trying to find the source of the oil leak-it's a tangly mess of hoses wedged in around the water pump and having the frame out of the way makes working on the cooling system more manageable. You said your pump was recently replaced, they didn't recommend doing hoses at that time? It surprises me. If you've got the system drained and the pump out, that would have been a logical time for new hoses on a 100k mile car,no? Anyway if you want me to keep inflating the time and cost of this project, then yes, replacing those hoses at this point is not a bad idea if you intend to keep the car. Saves you the trouble of repeating all this labor if they burst a month from now.

[rlesko]

Originally Posted by Jvac

Access to water pump and hoses is definitely easier with subframe out of the way too. I spent a lot of time sitting underneath my engine trying to find the source of the oil leak-it's a tangly mess of hoses wedged in around the water pump and having the frame out of the way makes working on the cooling system more manageable. You said your pump was recently replaced, they didn't recommend doing hoses at that time? It surprises me. If you've got the system drained and the pump out, that would have been a logical time for new hoses on a 100k mile car,no? Anyway if you want me to keep inflating the time and cost of this project, then yes, replacing those hoses at this point is not a bad idea if you intend to keep the car. Saves you the trouble of repeating all this labor if they burst a month from now.

Thanks for your wisdom. Wrt to the water pump, I diagnosed and replaced the water pump myself (I have a laptop with ISTA+ and a good enough garage set up to do most things by myself). I considered replacing some of the coolant hoses but time was of the essence and I didn't end up ordering them and had to put the car back together. I'm viewing this next project as another figurative 'bite at the apple'.

[rlesko]

Originally Posted by johnung

MYSTERY SOLVED!
Okay, I think I figured out the history of this so-called “M Sport” Right Engine Mount for the F30 335i RWD.

The resources used were Realoem and GetBMWParts websites, and my Bentley shop manual. I always pull part number from Realoem first. Later I look them up in GetBMWParts website because it is an actual BMW dealer parts website. Realoem can have me thinking that a certain part number is correct, but the GetBMWParts could tell me that part is no longer available and was replaced by another part number. The Bentley Manual sometimes shows me that diagrams in Realoem are misleading.

For those who don’t know BMW factories have a history of doing weird stuff when models are changing over or LCIs are happening. Realoem can say that a car has one part number but when a mechanic removes that part, it could have a different part number.

My speculation is that if new parts arrive for a new model and the factory has run out of the old parts, they just start installing newer part numbers in old models. Maybe it’s planned and other times not planned. Sometimes it appears like they ran out of a new part so the just grabbed an old part out of inventory and installed it in a new model car. This is their quick solution to Just-In-Time Inventory startup problems with a new model.

This happened a lot when BMW cut over from the N55 PWG engine to the N55 EWG engine around July of 2013. Both the existing F30 335i’s and the new model F32 435i’s were supposed to get N55 EWG engines. Well all of the 435i’s did, but when they had any parts availability issues the factory did weird things with the 335i. Any 335i/ix built around that date often needs a visual inspection for certain parts to see which parts the factory actually installed.

Your F30 335i RWD (VIN NN67693) has a build date of March 2012. The E90 335i RWD was built through October 2011. The F30 335i RWD began being built in April 2011. So there was actually a 7 month overlap where both E90’s and F30’s were being built and there are many parts shared between the two.

With your car having been built only 4-5 months after the overlap ended, I tried to research and not assume anything.

From the beginning of the F30 335i RWD in April 2011, until your car was built in March 2012, and through June 2012 below are the Engine Mounts that were installed on this model.

LEFT 22116787659
RIGHT 22116855460

In July 2012, the factory began to install a different right engine mount on the F30 335i RWD. This didn’t appear to be part of a larger LCI. Maybe this part hadn’t made it through development and testing for the April 2011 F30 release? Or maybe BMW spotted something in the early built models that caused the change? It doesn’t really matter.

So in July of 2012 BMW began installing in all F30 335i RWD cars, the right engine mount part number 22116855458.

Starting with July 2012 is when that crazy “M Sport brake P337A/S2NHA” reference began in Realoem. There is no logical reason why Brembo brakes on the front of the car would technically require a different engine mount. After all, all the previous cars built from 04/2011 to 06/2012 all had Brembo front brakes too. Every F30 335i/ix ever built has Brembo front brakes.

It appears that this new right engine mount began to be installed at the factory in July 2012. Whomever was updating the database that became Realoem had to find a way to indicate that. Someone must have said “Hey, all F30 335i RWD cars have either brake code P337A or S2NHA, so we’ll use that as the differentiator to install the new Right Engine Mount 22116855458.

Still concerned about the BMW issues that I mentioned above, I also compared the related Right Engine Mount related parts like the mounting bracket, the subframe and the fasteners used to connect them. According to Realoem all of those parts are identical in build months 03/2012, 06/2012 and 07/2012 when the new right engine mount began.

So the newest right engine mount that you are calling “M Sport” (but it really is not) should just bolt-on in place of the original earlier right engine mount installed at the factory.

When you install it maybe take side by side photos of both right mounts to see if there are any obvious changes. This whole thing could just be a change over to a new supplier with a different process or materials, in which case old & new may look identical. I have seen old engine mounts that have compressed to half of their original size over time.

I enjoy a good Sherlock Holmes puzzle. Hope this helps!.

here is the side by side pic. "M Sport" has the rubber shield. There seems to be no difference in size, shape, or bolt placement. It should be noted the "M Sport" is a genuine BMW mount whereas the other one is by Lemforder (not sure who the OEM Supplier is). This obviously shouldn't change anything wrt to shape/fitment/etc, but just wanted to point it out.

[rlesko]

Subframe drop completed! Everything went according to plan. Engine mounts didn't really seem to be in bad shape but refreshed them anyways. The old sway bar bushing were completed toasted. The new sway bar + bushings feels amazing. Turbo inlet/outlet lines looked ok and I didn't have the confidence to mess with it. Took around 12 hours start to finish on a lift.

I broke some of the cable clips which hold the power steering cables. I zip tied them in place so they're fine for now but I couldn't find the part number for new clips. Can anyone advise?

Couldn't find them on any realOEM diagram and none of these seemed like the right ones https://www.realoem.com/bmw/enUS/sho...diagId=61_1865

For clarity- talking about the cable clips along this wire

[SuperLomi]

Try here: https://www.realoem.com/bmw/enUS/sho...diagId=61_1896

Or here: https://www.realoem.com/bmw/enUS/sho...diagId=61_1711