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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > Changed Coolant & MT Fluids Today



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      09-08-2012, 04:31 PM   #1
fl335i
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Changed Coolant & MT Fluids Today

Finally got it done. My 6spd has MTF-LT-3 on the tag, got the 5L jug from tischer. The fluid that came out was NASTY. Brown and smelly. The new stuff is almost transparent. That stuff is super slippery. I only have about 45k on the car too... lifetime trans oil my arse bmw. that's just so you don't have to pay for as part of the maintenance care gimick everyone is doing.

Got the coolant drained per the bentley manual. Pulled the intercooler out and drained the radiator and pulled the hose off the water pump. It was pretty easy overall. IC came out like nothing, I was amazed how easy it was. And, I needed to pulled all that stuff apart, it was full of leaves, dirt, bugs.... jeez. I hosed it all out. the IC had some oil in it, so I rinsed it out with the garden hose real well. No oil anymore. Put it all back together, super cleaned up, and ran the bleed process twice for good measure.

The only fiasco I had to deal with was getting the new trans fluid into the trans. I thought I was going to use the suction gun like I do on diffs... I was wrong. tha LT3 is so thin, it was coming out both ends and the hose was too big for the fill port. So had to run back out and get a actual bottle pump and got it filled in 2 minutes. The sucky part was I lost about a liter of that LT3 fluid.... oh well. learning curve.
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Last edited by fl335i; 09-08-2012 at 04:37 PM.
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      09-16-2012, 10:42 AM   #2
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+1 Life time fluid my ass, had mine done as well and the fluid was just as you described.
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      09-18-2012, 07:50 AM   #3
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Coolant Flush

I also did this maintenance job over the weekend, didnt pull the IC tho, which is why the mix I ended up using was 75/25 coolant/water. What are the normal running temps supposed to be for our cars? I have an e92 BTW. Thanx fellas
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      09-19-2012, 09:20 AM   #4
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can anyone help here? Tried searching...normal running temps for e92s?
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      09-20-2012, 07:39 AM   #5
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I dont have a coolant temp gauge. just oil temp. You need to run a scan gauge to see what the coolant is. I'm betting it's in the 195-210 range. My oil temps are 225-240 w/ac on in 100F FL sun traffic. Evolution sport cooler is in my near future once my 530i Daily Driver is sorted. More water less antifreeze actually transfers heat better. But it's not practical in the real world to run pure distilled water for a few years. and it's risky if it gets cold and freezes. I like 50/50, call it a day.
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      09-20-2012, 10:25 AM   #6
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The water temp is controlled by the ECU and the electric water pump and various depending on what the engine is doing to improve fuel economy, ie. on the freeway it will run it hotter, when it would normally run cooler, to improve mileage. I read that is was the reason the water temp gauge was removed, as it would freak us out by constantly changing, and we would inundate their service dept. with false problems.

I'm running 60/40 water/coolant to optimize cooling a bit in Phoenix.
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      09-20-2012, 08:31 PM   #7
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^ interesting and makes sense!
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