Feeling sump plug
Seasoned HDF Member
Joined: Jun 2017
Posts: 5,315
Likes: 4,272
From: Granville New York
The long plug causes sumping but according to the "inventor" this solves all of your problems lol. Apparently during the king of the baggers during prolonged high rpm operation on motors that none of us will never have the longer plug blocks a small percentage of the sump hole causing sumping...come on its true...you know you want to spend 13 bucks plus tax and shipping to buy a 2 dollar plug. And tell your buddy to be careful installing it because he wouldn't be the first guy to over tighten a sump plug and crack the engine case. But at least he'll solve a problem that never existed on the softail m8.
Club Member
Joined: Apr 2016
Posts: 11,458
Likes: 8,288
From: Inland NW
Here is a thread on it in the Milwaukee 8 Engine sub-forum https://www.hdforums.com/forum/milwa...sump-plug.html
Thread Starter
|
Grand HDF Member
Joined: Mar 2008
Posts: 4,994
Likes: 653
From: bklyn,ny
The long plug causes sumping but according to the "inventor" this solves all of your problems lol. Apparently during the king of the baggers during prolonged high rpm operation on motors that none of us will never have the longer plug blocks a small percentage of the sump hole causing sumping...come on its true...you know you want to spend 13 bucks plus tax and shipping to buy a 2 dollar plug. And tell your buddy to be careful installing it because he wouldn't be the first guy to over tighten a sump plug and crack the engine case. But at least he'll solve a problem that never existed on the softail m8.
Trending Topics
Seasoned HDF Member
Joined: Jan 2009
Posts: 12,656
Likes: 8,261
From: Ottawa, Ontario
Never mind. I clicked on the link, question was answered
Last edited by roussfam; Apr 1, 2023 at 02:26 PM.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
5th Gear
Joined: Mar 2006
Posts: 9
Likes: 0
Sump plug= 1/4 NPT
I replaced mine but just bought a 1/4NPT HEX plug at hardware store and cut 3 threads off. Total cost $1.99.
Grand HDF Member
Joined: Sep 2017
Posts: 4,359
Likes: 1,219
From: Dubuque, IA
So we went from M8s don't sump (this was the word here 5 years ago) to a 1/4" shorter sump plug solves a sumping problem? Amazing...Right up there with requiring exhaust with back pressure.
Stay tuned for the next M8 wonder.
Maybe it can float?
Stay tuned for the next M8 wonder.
Maybe it can float?