03-04-2022, 02:43 PM | #1 |
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Head Gasket
Blown Head Gasket?
2017 M240i with 50,500 miles. Many bolt on mods. Stock turbo. Dinan tune. Car was at idol for about 15 minutes. Heard a loud whistle sound. Less than 5 minutes later heavy white and gray smoke pouring out of tail pipes. Any ideas?
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Mineral Gray 2017 BMW M240i XDrive.
Current Set-up: Dinan Stage 1 Tune, Dinan High Flow Exhaust with Black Tips, Dinan Cold Air Intake, Dinan Mid-pipe, Active Autowerks Down Pipe, FTP Charge Pipe, CSF Heat Exchange, Black Beyern Ritz Wheels, Michelin PS4S Tires, Carbon Fiber Mirror Caps, Black Kidney Grill, Alcantara M Sport Steering Wheel. Last edited by MrShowOff; 03-04-2022 at 02:49 PM.. |
03-04-2022, 05:50 PM | #2 |
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Sounds more like a blown turbo than headgasket, with coolant and oil leaking past the bearings, as you don't normally get any noise with a blown headgasket. Could also be the intake charge cooler, too, which is a known failure area.
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03-06-2022, 02:04 PM | #4 |
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Some people have had valve cover failures after long idling. I think it's more PCV related than the actual cover.
How's the coolant looking? Somewhere in this thread, there's a couple https://f30.bimmerpost.com/forums/sh...292652&page=33 https://f30.bimmerpost.com/forums/sh....php?t=1829682 |
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09-16-2023, 03:21 PM | #6 |
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Pcv diaphragm.. its always what it is
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10-02-2023, 10:55 AM | #8 |
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I just put the ross racing occ/ pcv delete kit on the other week, motivated by this exact fear.
Mine is a 2017 with 61k Diaphragm looked suspect when I took it out. A little tugging on it and it ripped too easy. Did this in prep for a drag race night as I knew it would be long stop and go idling in the staging lane. I definitely suggest everyone consider this somehow in their routine maintenance. At least refresh the diaphragm at a minimum
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2017 F22 M240i, Xdrive, M Performance Package
Active Autowerke Downpipe, Dinan Carbon Fiber Intake, Dinan Carbon Fiber Turbo Inlet, Dinan Mid-pipe, xHP Flashtool, MHD Stage 2 To do next list- #1- Wheel Spacers & Tires, #2- B58 TU Pump, #3- Flex Fuel Kit |
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10-02-2023, 02:23 PM | #9 |
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I’m wondering is the issue affects MY 2021 or just older m240i’s
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10-02-2023, 04:16 PM | #10 |
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Specific for the gen 1 b58 2016-2020ish
I'm pretty sure the TU engine has an entirely different valve cover and ventilation system. If it's a weakness still?... hopefully one of the TU guys jump in and confirm. Kern417 on here has good information on YT, just search b58 pcv
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2017 F22 M240i, Xdrive, M Performance Package
Active Autowerke Downpipe, Dinan Carbon Fiber Intake, Dinan Carbon Fiber Turbo Inlet, Dinan Mid-pipe, xHP Flashtool, MHD Stage 2 To do next list- #1- Wheel Spacers & Tires, #2- B58 TU Pump, #3- Flex Fuel Kit |
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10-02-2023, 06:09 PM | #11 |
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Given your mileage, it sounds like the PCV. It's a thin membrane that gets brittle and breaks over time.
I had the same issue. Google up B58 PCV diaphragm replacement and do it; solved the problem for me. Only hard part is prying the cap off if you want to reuse it. Otherwise, much faster to just break it off and snap on a new one. |
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10-03-2023, 05:31 PM | #12 | |
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10-05-2023, 10:10 AM | #14 |
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You can delete the OEM cap all together and have it vent to atmosphere. I bought the basic one with no catch can.
https://www.rossrperformance.com/pro...lete-version-1 |
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10-06-2023, 08:28 AM | #15 | |
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10-06-2023, 09:06 AM | #16 |
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Correct. I dont have inspections in my state, forgot all about that. Its easy to remove put the oem cap back on for testing if someone wanted to go that route.
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