Ideally when you place engine flush in the engine you should always dump a cheap oil in there after to "wash out" the remnants of the flush. It thins out the oil!
Before you go through with a replacement diff, I’d recommend changing the fluid again and using the genuine Bmw fluid as they have friction modifiers and can usually cure the slight clunks and grinds these diffs like to do.
Small note for you guys. When you take the oil cap off don’t lay it upside down, the oil gets under the seal ring and then causes the seal to fail and you’ll start seeing oil seeping out around your cap. Also don’t leave tools on the engine, may scratch the plastic covers or knock your tool deeper into the engine.
I do believe the differential clunk is like that from factory. It was a known trait of the E46 M3 differential because it was such a chunky differential, and I'm pretty sure the 1M uses the E46 M3 differential as well. My friends E46 M3 had that clunk at low speed directional changes and it was normal. Do check with some BMW experts, but I think they may say the same.
Ideally you want to open the fill plug of the diff before the drain plug, because you might not be able to open it later but the diff will have already been drained
Great video Tim! I’ve had my 1m since new and we crossed paths in Barnet when I was in it and you were in your SF90, earlier this year. I’d like to think I prompted the purchase😂
The two plugs that are covered in soot are a sign of leaking injectors (common problem on the n54 engine). On my second n54 so know this all too well! Edit: don't know if you will se this but would also add that the very dirty exhaust tips are also a sign. Worth getting checked as fuel will be leaking down past the rings and diluting the oil
I'll be watching this series with great interest. My 1M only has 40,000 km on the clock but the differential groans when going slowly around corners or in car parks. I've tried the BMW Diff fluid with FM Booster several times, but it doesn't fix the issue. Am starting to think that a diff rebuild or replacement is the only solution.
Nice to see a lovely car in such good hands. Must have been loved by first owner so hopefully he will be pleased to see the car in good shape and getting such TLC.
When I had my 135 I never put additives in the fluids, factory was good enough I just shortened the service interval by half. If I did high performance driving then it went down to 1/4 of the service interval especially with the oil.
A lovely little car that is in the right hands for a little TLC. In terms of mileage, it should be good for another 40K if it's not tortured around the Nürburgring at any time in the future. If the engine fails, all is not lost as I have witnessed many 6 cylinders reborn into fire breathing monsters. Great video and I look forward to further M1 content my friend. Thumbs as always!
With regards to the diff clunk its possible it could just be bad diff bushing. The car is older so the rubber may be deteriorating. Most shops will just say you need a new diff so they can make more money off you. Try replacing the bushings first.
I’ve been using Liqui Moly in my car (2013 VW CC 2.0T manual) for 50,000mi… it’s been great! Noticeably smoother at idle and it just got a clean bill of health from my oil analysis at Blackstone labs. It’s all I’ll run from now on! 👍👍 They say “oil is cheaper than metal!”
Always check the refill plug comes undone before draining, also doing this aids drainage as it allows air in thus stopping the chugging effect when draining. Also if refill is seized you still have oil in the diff or gearbox.
I am so happy to see this car on the channel! It would be a nice trip coming to the Transfăgărășan Highway with this thing, a manual BMW is THE proper way to drive that road (coming from a manual BMW owner, myself), and for sure the audience would love it. Thank you for all the hard work you are putting down for these videos, cheeers!
There is a guy called Peter at the Nürnburgring who specialises on BMWs. He doesnt have a homepage, or anything like this. But he is one of the best tuners of BMWs. Misha probably can hook you up with his number. Would be a nice colab.
I like that car as we don't have it here in the States, but it's really cool and I know you're a guy that does clean easy mods. Wonder if you'd do a Mat Armstrong type if mod job on that one. Have a little fun building it up.
It really depends on the car, but usually it only adds the ability to clean the filters as a benefit. You usually won't feel the power difference (if there even is one. Sometimes it goes down), it often decreases filtration, and in some cases the OEM filter's pleat design smooths turbulent air while the aftermarket doesn't. If this is the case you get surging and stumbling as the MAF struggles to read the turbulent air.
Tim’s not wearing the Aventi! 😮 First video I’ve seen in forever without it on! Can’t quite tell what’s replaced it 🤔 maybe/ probably a Swatch but i can’t tell which one… 👀
Those engine oil flushes are a dangerous waste of money, I used a highly recommended one and it caused the oil to clump in such a way that it clogged the pickup filter in the sump and ended up blowing my V6 Mazda 929's engine! And those fuel additives are bullshit too as fuel isn't dirty and it actually cleans the injectors itself, it's just a marketing gimmick.
@@Shmee150yes now, people stuck the prices up the day after you got one. No joke. I was looking after your video in Switzerland I think. The day after you got one prices went up. You got the cheapest orange one by far. There was a white one that needed work for £25k so if you paid less you got a bargain for the iconic colour
