M8 sumping fix. We tear down this Harley Mil Do you ha...

  • M8 sumping fix. We tear down this Harley Mil Do you have a reputable dealer near by? I would ride it like I stole it until something gives and let them fix it at their cost. Mar 31, 2025 路 If you are already experiencing some sumping on one of those bikes, this pump has proven to mitigate the issue. Feb 2, 2019 路 Even if the root cause is poor production specs in the cylinder fit or lack of trueness with the crank, the fix is made with a change to the oil pump. We highly suggest upgrading to an S&S M8 oil pump. If someone ever gets this problem truly worked outmy interest in owning a M8 will begin. This occurs when oil accumulates in the crankcase rather than circulating properly through the engine. As far as I know, the sumping problem comes from doing engine work. Comprehensive overview of the Harley oil sumping fix to end all oil sumping fixes. I have an 18 M8 that started out with oil migration. If I find excess oil in the sump, then I will address it. If you ride short distances, you'll likely never experience the sumping issue. Install takes about 4 hours with the right tools and skills. Miss you bro. After 1 1/2 years of my warranty with oil studies and two try's from the dealer, oil is still just off the tranny dipstick, Harley call's it fix. After a shorter ride, the bike will build up oil in the crankcase and then you'll shut the bike down. Installing a redesigned oil pump from the 2020 Harley models has proven to be a reliable remedy for the oil sumping issue. Milwaukee 8 tear down. The sumping experience in the M8 is due to a miscalibration between the oil entering the crankcase and the oil being removed from the crankcase due to a defective oil pump and other engine design flaws. . Who really thinks that M8 owners need to have a look here to see why M8 engines sump I always knew it to be an oil return issue, I never thought it would be this obvious and overlooked plug until now( word of caution, if you attempt changing this plug yourself, be forewarned there are reports of case cracking when M8 • Wondering If You Have A Sumping Problem? 馃 Easy Check • Pull Crank Sensor •Measure Oil In Sump Harley Davidson Milwaukee Eight M8 Issues Sumping, symptoms and updated Pump Part Numbers Check out over 300 of my uploads here: / ridersunited CLICK THIS Link to SUBSCRIBE: https://www. Check every 4000km and before every dealer service. On the next startup and idle, the crankcase will empty and you'll never become aware of the issue. What do you need to know, and where to start? Let's find out! This is going to get very interesting to watch and see what it actually takes to fix the sumping issues. M8 Oil Sumping Have a 2018 Road King Special. Jul 12, 2025 路 How Can A Rider Diagnose And Resolve Wet Sumping Issues In Their Harley-Davidson M8 Motorcycle? To solve wet sumping in your Harley-Davidson M8, first check the oil level. The Milwaukee-Eight oil sumping issue happens over time, so if you rid May 12, 2020 路 Reading through the latest revision of the Service Bulletin on sumping (M1450 dated 11/15/2017) the MOCO outlines a test/inspection procedure to determine if the M8 motor is sumping. I check my oil levels often. Rick "Superman" Doolin 1970-2014. Way too may people will tell you to fix it before it becomes a problem. youtube Various sumping fix kits, including upgraded pumps and seal kits, offer effective solutions. New comments cannot be posted and votes cannot be cast. It reminds me of the internet chatter over the twin 5) catch sumping volume in container 6) Check crank load is about 200ml 7) Loctite grub screw and re-install Dealers ARE NOT checking sumping volume and have NO IDEA if a problem is developing. 2020 Harley Davidson oil pumps have been re-engineered to remedy this sumping issue. I hope the best for the OP and I hope he has found the fix. Feb 10, 2026 路 One of the most widespread and concerning problems with the M8 engine is sumping. M8 problems found. Follow along with this M8 teardown and find out why its sumping. [ Primary vent installed ] Never had a sumping issue until after the vented dipstick was installed. Being that Harley has not issued a recall, the expense of this repair falls on the owner. All stock motor. Archived post. The only way to eliminate this problem is by changing oil pumps. IF there was an oil sumping issue at what mileage think it would happen? Thanks. Nice first post by the way 2021 Indian Roadmaster Limited - 2004 Softail Springer - 1993 Dyna Low Rider - 1983 FLHT 275,000 HOG Miles IBA Member since 3/31/12 RIP Dr. Problem is most common on 114s and bigger, also stage 2 motors and beyond. If it’s not broken, don’t fix it. Sorry for the pun but I’ve been reading about oil sumping in the new Harley Milwaukee 8 engines. Sumping problems. e8zv, zw28t, 749bdu, 3hjrov, fodjo, rnsfn, nvdzn, 8q77x, exds5, mili,