FIX this Common BMW Oil Leak

Change out the N55 Oil Filter Housing Gasket on your BMW with the least amount of mess in the shortest amount of time. While you’re at it, might as well upgrade to the Mosselman thermostat, but first let’s see if it delivers on what it promises during the test drive after replacing the oil cooler gaskets as well.
Mosselman Oil Thermostat F Chassis (N55): tinyurl.com/MossFN55
Mosselman Oil Thermostat (S55): tinyurl.com/MosS55
Mosselman Oil Thermostat E Chassis (N55): tinyurl.com/MosEN55
Oil Filter Housing Gasket: tinyurl.com/ofhgasket
8mm Wrench: amzn.to/3ClOqZO
11mm Magnetic Socket: amzn.to/3cbm1Lq
Torque Wrench: amzn.to/3AepUHk
Digital Torque Wrench: amzn.to/3T1lwUZ
Full Tool List: kit.co/fritzramos/n55-oil-fil...
Thanks for tuning in. If you are looking for a complete tool kit as well as video gear hit the links below.
Tool Kit: kit.co/fritzramos/bmw-mechani...
Video Gear: kit.co/fritzramos/filming-gear
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00:00 The problem
01:30 Essential Tools
01:53 Prep the car
04:42 Coolant Drain
06:09 Remove the Oil Filter Housing
08:35 Clean the mating surface
09:09 How to identify a leak
09:40 Clean the housing
10:41 Install the Gaskets
11:35 Install the oil filter housing
13:10 Add in oi HERE
13:26 Coolant Purge Process
13:56 Install Oil Filter Cap
14:06 Reinstall Intake Manifold
14:37 Reconnect charge pipe & O2 sensors
14:57 Run your final checks
15:35 Prime the engine
16:09 Test Results
17:42 Recommendations

[@aidenwallaker2067]

Your videos are actually insane like you have no idea how much everyone appreciates you! You have saved me so much money by giving me the Confidence to do these jobs myself bro shout out to you!

[@FritzRamos]

Thank you I'm very happy to hear that, but don't forget to congratulate yourself. You're the one putting in the work

[@Maddoggy2023]

Great Video. Thanks for all the tips, tricks, tool recommendations and what to look out for. Seriously love the step by step walk through. Nice work. Keep the videos coming.

[@geemoney9533]

Great job I had to do this for my bmw but I also changed the gaskets in the manifold

[@ShowMeWhatINeedToKnow]

AMAZING WALK THROUGH!! THANK YOU!

[@MrRab]

Thanks for making the video. Well done. I did this job yesterday and it wasn’t too bad. While I had everything apart I saw I bad I need to change the oil filter gaskets. Already watched your video on that!

[@saintsfan7268]

Just found your channel!!! Keep them videos coming great job 😎

[@nofilter2091]

Another excellent step by step video Fritz, great work. I didn't know there was an upgraded part for this.

[@FritzRamos]

Thank you. I only found out about it last year. People before were doing the complete bypass, but it takes the car forever to warm up.

[@NijoR873]

Not doing this anytime soon but will definitely look back to this video when this oil leak arises on my M235i. It is honestly an amazing video and the amount of effort that has been put into this is extremely impressive. Well done and thank you for providing such useful videos!

[@FritzRamos]

Thank you for that, I appreciate your kind words and support. I wish you nothing but good times with your M235i

[@kingming869]

I'm so glad someone has a dedicated channel just for a car I drive. I had just watched the belt, tensioner replacement video. I might be doing that first since my car only has 37k miles.

[@FritzRamos]

Thank you. If your belt is showing signs of wear and you have no oil leaks from the oil filter housing area then that is exactly what I would do as well.

[@thomasdiersch1181]

super video, very clear and understandable. Love the effort with lighting and camera position. Well done

[@FritzRamos]

Thank you for always showing your support. I hope this video will be useful for you when your car needs these gaskets replaced.

[@rokelesoke]

Great video, great presentation and you kept it interesting throughout. Props to your video quality and editing skills. Glad to have stumbled on to this channel. Subscribed in the first few minutes!

[@FritzRamos]

Thank you! Glad you enjoyed it!

[@samcarmel6975]

Your videos are seriously killin it :) love the hard work keep up the good work 👍 I’ll be using this video soon I’m sure

[@FritzRamos]

Thank you. I hope it covers everything that you need.

[@davidhoang4241]

Succinct, detailed, informative and straight to the point. No BS fluff crap. Awesome instructional video!

[@FritzRamos]

Thanks man! Especially for letting me get a 1st run with yours

[@jg_media9]

Great video bro another super detailed and informative video I know I can speak for everyone when I say we appreciate the time and effort and attention to detailz you put into these videos 👊 I've been loving my MSL thermostat as it looks great and performs even better

[@FritzRamos]

Thanks man I appreciate that. You actually beat me to the punch on making a video on this so I appreciate you. Good to hear that you, having it for even longer is still appreciating it.

[@karonugma]

I have the N55 on X3 and I just replaced about 2 months ago both gasket because they were melted and oil got mix into the cooling system. Now, it happened again and melted the OFH gasket. Looks like the cooling is not enough. Do I need to replace the pump and thermostat? What would you suggest. By the way, love all your videos. They are very helpful. Keep it up.

[@FreudeF10]

Hey, awesome job though! Its really awesome narration with instructions and tools recommendations! Hands down! Question: those oil return lines connected to the oil cooler housing, have two oil gasket (rings), what are their part number, or where can i buy them from? Thanks a lot!

[@TheJemster]

Thx for making this video Fritz! Do you know the part number of the 2 small o-rings?

[@walidm7342]

Hi dude u doing really well I work on 330 e46 project and the point to make it 100% without any common bmw problem and this thermostat took my attention and it’s on my list mosselmann didn’t made one for old models

[@scottkinney3684]

Just got a m235 this Chanel has it all thanks man!

[@FritzRamos]

Congrats and thank you.

[@Tluchak14]

Ironically, I just installed the Mosselman thermostat on my 235i this week. I didn’t go the full route of replacing the OFHG, so it was a quick 45 minute DIY for me. I drive highway to work every day, so the last bit of info was helpful for me knowing it’ll just help me with longevity (currently I’m closing in to 110,000 miles). Thanks again for another helpful video.

[@FritzRamos]

Thank you. What made you want to upgrade it?

[@Tluchak14]

@@FritzRamos The main reason is for overall improvement to the reliability of the engine that comes with the lower oil temperatures. I already have what most to be considered high mileage and I plan to keep it for a few more years, so reliability is important for me.

[@FritzRamos]

@@Tluchak14 that's the same reason I got it! Good to hear I'm not alone😅 Hope it serves you for many more years to come

[@noelelnolo9642]

Fritz, as always, great video!

[@mandeepsingh-zg4yr]

Brother I have one question I have bmw 2006 320i has engine oil cooler have two hose(pipes) one is coming from engine side. when I start the engine oil leaked and coming from the engine side driping from this pipe. Can we fix it without opening the whole engine

[@berfyavuz8682]

Link please this looks amazing

[@danielquintanar8146]

what happens if i don’t prime my engine ? I’m curious bc I have a 2011 E-series equipped with an n55. I bought the same mosselman oil thermostat for my car and it came with a QR code with instructions that basically just say to unbolt and bolt on the new piece.

[@B3nnywhit3]

im gona have to do this soon. all 3 gaskets. question that rear bolt that you did not tighten with the torque wrench. has that given you and issue, any leaks there?

[@PERCUNIA-DE-VIE]

Frtiz I have a N62 leaking oil, what's the best solution w/o removing the engine to replace the seals?

[@one9kilo]

Best damn video tutorial on this subject hands down!

[@lucaalux]

I upgraded my thermostat with Mosselmann. Paired with MHD sport cooling mode. Now my engine operating temperature are: coolant from 85 to 90 Celsius, oil from 93 to 104 Celsius degrees. Before that coolant was 105 and oil 118 Celsius deg. This mod improve the life span of all gaskets and timing chain tensioners. I am mechanical engineer but not an engine designer, just my concern is about lowering temperature will thighs tolerance between pistons and liners. main goal of bmw designer has been set this temperature so high for emission homologation and fuel economy. Good job Fritz, I appreciate!

[@FritzRamos]

Thank you. All very good points and very detailed 👍 I suppose we'll have to monitor the situation over a longer period of time to see the full results

[@kenkaycardoso6641]

Hey guy. What if the Car isnt able to start due to a missing time belt as a result of the oil leaking from the gasket. Will JUST removing the fuse be enough in the setup process? Thanks

[@lewiswaite9732]

If replacing just the thermostat with the mosselman, would you suggest going through the priming process removing the fuse then priming the pump after fitting the new msl t-stat? I’m certain that it is just the thermostat or the pipes going into the thermostat that are leaking on mine but I have a mosselman t stat on the way so going to fit it and look at ofhg in the near future

[@tomf6920]

Do you need to replace the air intake manifold gaskets? I've seen some videos do it, but they also didn't mention the priming part, so i trust your process more.

[@DigitalDissident]

I did this for my E82 N55. Now it runs 20 degrees cooler than stock. Also went with a better silicone gasket. Was a big effort with lots of steps to do in my garage. Worth it. Thermostat, fan speed setting, intercooler, & M3 cowel conversion all combined results in significantly lower engine bay temps which extends the life of your components.

[@FritzRamos]

Well said and thank for sharing your experiences. Where did you get the upgrades gaskets?

[@johnnyartiga3028]

do you mind telling me what fuse you pulled i’m currently trying to figure it out and can’t find any info on usdm 135i 2012

[@DigitalDissident]

@@johnnyartiga3028 When I pulled the fuel pump fuse, my engine fired up for a few seconds anyway. So take out your ignition coils. My cars been running fine though. I don't remember what fuse it was

[@FiveTeamOfficial]

does this process work exactly the same for the 8 speed automatic M235i coupe or are there any different steps? I am really considering doing this. Please help!

[@Spiky69bad]

dude u just awesome I really enjoy to watch the video

[@ChristianNg]

Did you replace the intake gaskets i was told to buy I am finding it very difficult

[@TheHunterHofman]

Good content, Fritz. I'm just not sure about the thermostat's purpose. It does lower the running temps when driving normally, because it opens earlier. However, the oil used in our cars is designed to be used at 105 - 115 degrees Celsius, meaning that there isn't an issue in the first place, right? It feels a bit like creating a solution for a problem that isn't there. So if you then track the car, this thermostat won't save you either, because it does not improve the flow of the oil to the oil cooler. On track it does exactly the same as an OEM oil cooler (apart from opening slightly earlier, slightly delaying your oil getting (too) hot). A more viable option would then be to get a larger oil cooler so that more volume of oil can be cooled, or work on improving the flow to the oil cooler. What are your thoughts on this? Again, great video and look forward to the next one.

[@FritzRamos]

Thanks and that was my train of thought before installing it but after testing I think perhaps there's additional passages or wider channels in the MSL thermostat that allow it to sustain those lower temps. All that is unofficial, but I can't think of another it achieves the sustained lower temps. If you have another idea I'd love to hear it. As far as lowering the running temps, I was thinking that any heat above operating temps is excessive and can cause additional stress on gaskets and plastic components so reducing that would be beneficial to the other components. However someone brought up a good point of the excessive heat being used to prevent gunk build up on the intake valves so I suppose it has it's ups and downs. There definitely needs to be more testing over a longer period of time. As things progress I'll be sure to share my findings.

[@kencorwin8341]

As I noted on your other OFH housing gasket video, the problem with using the 12-point ratchet on the E-torx bolt head is that it easily strips the bolt head and makes it much tougher to remove. Much, much tougher. Hours of tougher. If that bolt head gets stripped, your estimated 90-minute hour gasket replacement job becomes quite an ordeal, given how already-difficult it is in the first place to reach that bolt and get leverage on it. So, when you get to the point that you’re about to remove that small bolt, first disconnect and move aside the cylinder head temperature sensor and the hose just beneath that sensor. These are located at the front of the engine, just to the left of the OFH. When you pull the sensor clip, do it **carefully** as the clip can fly away, it’s not secured around the sensor. The adjacent coolant hose is attached to the engine via two simple 8mm bolts; just be firm but always gentle when pulling any hose. With these out of the way, you can fit a proper ratchet wrench with E-torx socket onto that very soft bolt head and avoid stripping it.

[@johnnygonzalezperez2346]

Thats what i just did, worked! I couldnt unbolt that little one even with the 8mm so i disconnected the cylinderhead temp unit

[@luisbolta8730]

What’s the correct size for the vrsf downpipe for the 2016 m235i? (3.5 or 4)

[@radiomaster200]

Hey have you done a differential fluid change? I don’t see any videos on it anywhere.

[@abdullahalqallaf7385]

Is there any solution for the gaskets issue ? My n55 m135i have the same leak issue after 16000km 🙁💔

[@frazmeup]

Does it matter if I do this upgrade on a stock N55?

[@EdgarRodriguez-tg4hq]

Where do you get your parts from ? Best parts

[@scottfershee1366]

Amazing video

[@radiomaster200]

If I’m just doing the oil cooler libes( forgot those gaskets) will it lose enough oil that I need to add more?

[@F22Reg]

Do you have a link to that digital gauge for temperatures?

[@libindaniel2000]

At what mileage interval do you expect the gaskets to get replaced? Is the 40k change part of any scheduled maintenance? If not, should a second owner who gets the car past 50k miles do the oil gasket replacement anyways?

[@aesca151]

My oil filter housing gasket started leaking around 40k. If you are doing normal preventative maintenance, you’ll have opportunities to replace this gasket at around the 40k mark. - Carbon walnut blasting at 40-60K - timing chain at 85k - coolant flushes

[@user-vd1yw4zd2y]

does the upgraded cooler fit on the 2013 640i? n55

[@tylerllewellyn6341]

Is the linked oil cooler good for any n55 it says e chassis but I have f chassis

[@ashotf3589]

U got the cleanest most reliable n55 lmao everything up to torque spec like a boss. Meanwhile I just snapped my sway bars bracket stud on the crossmember tightening to much 😂

[@FritzRamos]

Thank you, but I cheated on that bottom bolt. Oh no! What will be your plan going forward?

[@ashotf3589]

@@FritzRamos lmao I’m just going to drill it through and but a size 13 bolt with thicker threading and plugging the hole😭 with red locktite 😂 do you think there’s more lateral or vertical force on those brackets? Replaced my stock bushings with power flex but my sway bar keeps sliding and rubbing my subframe. I have been loosening the brackets and hammering the sway bar back to the center lmao. This last time I did this I snapped the stud on the subframe retightening

[@AlfaSixxx]

Hey Fritz! I did this job today whilst following your step by step instructions. I double, triple checked that the car would not start after pulling Fuse 165. Took about 2.5hrs to complete both gaskets and bleed the coolant, and just as I was about to prime the oil circuit for the first time, the car started after a few cranks! I was shocked as the fuse was still out! I immediately turned it off thinking there might have been some residual fuel in the lines, but it started again without the fuse and continued to run without it being plugged back in! Did this happen to you by any chance? Fingers crossed everything turns out ok! Thanks again for the video. It's been a great resource!

[@amgb10]

same thing happened to me today. how is your car running now 8 months later?

[@richardggeorge]

Unlike the Keis Motorsport version of the same instructional video (which is 37min long!) you stated with the most important step FIRST, i.e. pulling the low pressure fuel pump fuse and running til it stalls. Don't want to lunch your engine! Edit: not sure if you want oil/coolant temps below 90degC for prolonged periods though as this may increase friction in your engine. This might be more of a track-only mod.

[@FritzRamos]

Thank you, but I did have the privilege of watching Bryan's video and making some changes and applying it to this project. If I remember correctly they also changed the gaskets on the manifold and did a belt replacement. So I just hope that the next person to record this job touches on a point that I missed or does a better job overall. Good point at the end there, I was thinking about that too. I suppose as things progress I could make an update video.

[@redeemer9763]

I did it step by step no leaks or anything but I lost 200 hp don’t know if my manifold in on right plz help I miss have my tubes car fast it runs fine just think I hear a air leak by manifold idk tho

[@Scotford_Maconochie]

Do you have this part # for an F15 X5 xDrive35i?

[@Jawnderlust]

2014 M235i here - just got my first valve cover leak and filter housing leak , as well as a leaking drivers side strut. 😢

[@FritzRamos]

Aww, not all at once. If you need help and are in the bay area, I have my old suspension for sale.The gaskets if you're up to it could be managed over a weekend.

[@fernando861203]

By any chance do you have a tutorial on how to change oil filter housing x3 2.0 turbo 2019

[@FritzRamos]

Maybe this can help kzbin.info/www/bejne/iJLcdoOwf7xjkKc

[@corybohn2013]

After owning a 2016 m235i and recently picking up a 99 Miata with low mileage, I prefer the Miata. Such less maintenance and are not as fragile as the bmw

[@f30_brandon17]

What kind of CP is that? Looks better than the VRSF I got! 😅

[@KingsCrossVIP]

is there anyone mechanic in Auckland NZ who can do this correctly? recommendations please

[@hammadamin5121]

Anoyne seen a video for f82 s55?

[@r4dolan]

Did oil filter housing gasket job on my X5 (n55) recently and got a bunch of vanos fault codes after the job, and mechanic thinks it's because I didn't prime the engine. Mechanic also thinks the engine is toast. I've read that other mechanics don't prime the engine after this job and I even called BMW and one of their techs told me they don't do it either. Anybody else run into vanos fault codes after OFHG job?

[@exaltedb]

What with the first steps should I change for a N55-based 335i e90?

[@FritzRamos]

Sorry, I don't know. I would check forums. If you find out, please share

[@infamous090105]

Can I put it on bmw 328xi 2013

[@empeu]

I wish they made these for n20s but I think n20s just have heat exchangers

[@knownbutunknown]

I did this job and it was successful However im still having a small leak out of one of the oil lines. I have changed the o rings but it’s still leaking. Anyone know what’s wrong?

[@77cvalle77]

Thank you for this! I do have am interesting and quite possibly a critical question. I am hoping that I am overthinking this but do not want to risk blowing up my engine. I have a 2016 435xi that started leaking a significant amount of oil from the thermostat to the point the engine started smoking and the ECU spat out a Drive Train failure. The belt did not slip. luckily I was in my driveway. Please keep in mind I did pull the fuse mentioned in the video however I did not even get a full minute in as I started panicking. My question is, should I just drain the rest of the oil or top It off after installing the new Mosselman thermostat based on the fact that I did not get a full minute in. I understand this might be a duhh question but do not want to risk anything.

[@FritzRamos]

If the oil is still good, just top off and thoroughly clean the area. Was it the new gasket that failed?

[@77cvalle77]

First off, thank you for the response! I've been full panic mode since Monday with this is specific situation . It just so happens its due for an oil change. Please keep in mind it lost a significate amount of oil for what its worth. Still suggest to top it off or am I risking it by draining and full service? Regardless of toping it off or full service should I plug in the fuse before starting the car? Please keep in mind the car ran as stated less then 30 seconds with the fuse pulled, from there the car has yet to be turned on. Sorry If I caused any confusion, the failed part was the original gasket. The new new Mosselman thermostat came in today, waiting for a new belt and pully as there was a lot of oil on it and well, I am there already might as well. PS- you are spot on the "MVPs" tools needed. Thank you much in advance and yes, I understand you are responsible if the engine goes FUBAR :)

[@FritzRamos]

@@77cvalle77 If you have the car in a safe place I wouldn't turn it over until the job is done. Keep the fuse out I would start by cleaning the engine bay of any oil and dirt that leaked and be very thorough. Then do the thermostat and gasket job. Third I would do the oil change but pour 1-2 quarts directly in to the oil filter housing and observe for leaks. This is be very tedious and time consuming as you can only add in a little bit of oil at a time. If you're leak free, then change out your belt, tensioner, and pulley. Once the car is ready to run, try to turn it over twice with the fuse OUT. Then you can put back in the fuse and you should be alright Just check for leaks as the car is running.

[@77cvalle77]

@@FritzRamos much appreciated Sir!

[@77cvalle77]

@@FritzRamos Just completed the job and started her back up. I cannot thank you enough for the video, the response to my question and the confidence you gave . All is well now.

[@TheHunterHofman]

Shouldn't the O-rings on the oil lines be primed with a bit of oil?

[@FritzRamos]

I looked around and didn't find anything on priming those o-rings. If you find something that states that it needs it please share.

[@geeniusatwrok]

I'm told that a 1/4" drive swivel e-torx socket will get that bitch screw out (the one behind the intake), and I have one in my tool box for this eventuality. Also have 8mm ratcheting combo wrench, not as long as that one but it should work. 2014 F30, but only 37K miles and showing no signs of OFHG leaks. So far.

[@hawkinsjd11]

Please buy a B58! It’s only for my selfish reasons, but I will need to do a lot of these maintenance items on my 2017 M240i in short time. Great videos btw.

[@sjsharksx408x]

No issues reusing the manifold gaskets?

[@FritzRamos]

No. If you buy a kit that supplies them then feel free to, but no CEL or issues as of now.

[@officialtd1316]

yo I have an n55 with a leaking oil pressure sensor. Should I just replace it?

[@FritzRamos]

If it's just the sensor leaking you can just replace that. Super easy and takes about 5 mins kzbin.info/www/bejne/nWHXgGZth7RsmJo

[@cosmicvoid4415]

How much gas do I need to have in the car before removing the fuse and running it?🙏🏼🙏🏼

[@FritzRamos]

It doesn't matter.

[@cosmicvoid4415]

@@FritzRamos Thank you so much for replying!!🙏🏼 does it also drain all of your gas, because I’m not sure if I should refill my tan?

[@FritzRamos]

@@cosmicvoid4415 no it just disengages the fuel pump so it won't flow to the injectors. Basically, only whatever is in the fuel line past the pump will be used up

[@irobtheweedmam]

Is this recommend for the M240 or just the m235

[@josephlonabaugh4557]

more so for N55 than B58

[@irobtheweedmam]

@@josephlonabaugh4557 quick question if it’s more so for the N55 can you still do it for the B58 even tho it’s not Mandatory

[@mattlasorsa5065]

The question is why would BMW engineering choose the temp they did for when the thermostat opened and sent oil to the cooler. If there are no cons to opening the oil t-stat at 20deg cooler, why wouldn’t BMW have done this OEM? Not saying you’re wrong, but questions like this need to be considered.

[@davidbarlow7955]

Because they follow the stupid EU emission scandal

[@terrencelawrence5007]

That's a lot of work 🙂

[@FritzRamos]

Kind of fun though

[@terrencelawrence5007]

@@FritzRamos I had to Jerry rig a lot. working between radiator and front of engine. I tied strings to my rachets in case they fell between so I could just pull them out even though I have a pick up tool. Don't worry I've learned that BMWs are a little different from other cars to work on. I'm glad it's done and I pressed on to complete both gaskets. It will be a moment before I take on the valve cover gasket. Even though it's not leaking.

[@ThatKa5p3r]

Lol love the overdubs, don't think I've ever seen better lip syncing.

[@FritzRamos]

Thank you, that means a lot

[@ThatKa5p3r]

@@FritzRamos Wasn't a dig, legit perfect audio synch & eq. You're doing twice the work & killin' it. Keep it up.

[@FritzRamos]

@@ThatKa5p3r oh sorry if it sounded like I took it that way. I took what you said as a genuine compliment. I truly thank you for your kind words

[@ThatKa5p3r]

@@FritzRamos Nope, all good.

[@terrencelawrence5007]

Saw this too late I just finished mines about a hour ago. Ops my bad I got n52

[@FritzRamos]

At least it's done now

[@tawandakyle5155]

Nice

[@mercuriification]

Damnit. My short shifter payment just cleared.

[@FritzRamos]

That's a good mod too. Which brand did you go with?

[@mercuriification]

@@FritzRamos I got the Turner from ECS. Install was really rough.

[@FritzRamos]

@@mercuriification Aftet doing a few of them, even with the right tools the most challenging part is that nylon cup. What tripped you up?

[@mercuriification]

@@FritzRamos Rear bushing refused to come out- took hours and several trips for additional tools. I was dangerously close to doing a reaction video fighting with it transposing your experiences vs mine. 😂

[@FritzRamos]

@@mercuriification What year is your car? on the 2015 m235i it was just bolted in. The 2012 328i had that one that needs to be pressed in. That pick tool I used as well as the pry bar is what made it look easy.

[@sasahsieh3687]

Anyone in Taiwan can help me with BMW oil leak prob. ? 😅

[@ChristianNg]

I took the 165 relay out and the car shut off in 30 seconds not 4 minutes

[@pleaseletitgo1818]

Click bait

[@andreaswisnu712]

When u fix a BMW car from oil leak,,, congratulation, u already broke your car, bcs BMW without oil leak is not BMW anymore