"SUMPING" needs explained
Member
Joined: Oct 2015
Posts: 7,289
Likes: 3,323
From: TN
I have heard that auto pedestrian accidents are on the rise. Think I will call that realtor.
Road Master
Joined: Jan 2016
Posts: 1,143
Likes: 433
From: Menifee, CA
Nonsense. I don't baby mine. It runs and runs. But if this was true, then best thing to do would be to run it hard and see if it will sump. If it does, take it for repair before the warranty runs out. Don't baby it, just ride it the way you do.
Road Warrior
Joined: Mar 2013
Posts: 1,923
Likes: 587
From: Alorton, Illinois
Originally Posted by 58jdn58@gmail.com
Hi guys. As an owner of a 2018 softie, AND avid forum reader, I don't understand SUMPING. No mechanic either! Lol. How does oil migrating from the tranny make the engine blow up? I have this mindset, that, the engine oil pan/ crankcase is a separate system from the other two(primary, tranny) and those egually as separate. I can possibly see tranny oil getting into the primary from a bad seal or something maybe, but that would result in an overfull primary and a dry unlubed tranny. Both bad. But how in the world would that time up an engine?
Sorry for being an idiot, but??? Lol.
Sorry for being an idiot, but??? Lol.
Seasoned HDF Member
Joined: Jan 2006
Posts: 11,463
Likes: 2,990
From: Charleston, SC
Hi guys. As an owner of a 2018 softie, AND avid forum reader, I don't understand SUMPING. No mechanic either! Lol. How does oil migrating from the tranny make the engine blow up? I have this mindset, that, the engine oil pan/ crankcase is a separate system from the other two(primary, tranny) and those egually as separate. I can possibly see tranny oil getting into the primary from a bad seal or something maybe, but that would result in an overfull primary and a dry unlubed tranny. Both bad. But how in the world would that time up an engine?
Sorry for being an idiot, but??? Lol.
Sorry for being an idiot, but??? Lol.
Road Warrior
Joined: Jul 2012
Posts: 1,996
Likes: 417
From: Cranbourne, VIC Australia
Hi guys. As an owner of a 2018 softie, AND avid forum reader, I don't understand SUMPING. No mechanic either! Lol. How does oil migrating from the tranny make the engine blow up? I have this mindset, that, the engine oil pan/ crankcase is a separate system from the other two(primary, tranny) and those egually as separate. I can possibly see tranny oil getting into the primary from a bad seal or something maybe, but that would result in an overfull primary and a dry unlubed tranny. Both bad. But how in the world would that time up an engine?
Sorry for being an idiot, but??? Lol.
Sorry for being an idiot, but??? Lol.
Come on man, read some of the other threads on this subject first. But so you are aware, you are correct the 3 holes for oil (sump, trans, and primary) should indeed be separate. But in some instances the trans is transferring to the primary, this is completely separate of the sumping issue.
The sump in most engines is at the bottom of the engine, and is more commonly known as the "oil pan". In some cars and motorcycles, such as ours, we have what is called a dry sump, which in a nutshell means the "oil pan" is relocated elsewhere than the bottom of the engine; among other things allowing the engine to sit lower to the ground to keep the center of gravity lower and more favorable. There are other benefits FYI, but in a nutshell the bottom of the engine is kept clear of excess oil by the oil pump that pushes the oil to the oil tank, at the same time as it pulls oil from the tank to give to the rest of the engine. In the cases where these bikes "sump" it means for whatever reason the oil is pooling in the bottom of the crankcase where there is not enough space for it to be pooled up without being in the way. Therefor it is getting hot and frothy from the crank whipping around and is causing interference, robbing power, and causing damage. There is more to it but that is the down and dirty.
Intermediate
Joined: Feb 2012
Posts: 43
Likes: 4
From: Chicago
😂 too funny.
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Tourer
Joined: Jun 2017
Posts: 494
Likes: 220
From: Qld, Australia
I'll be selling mines one lucky buyer can own an M8. I dont have time to deal with figuring out whether M8's are still prone to sumping after three model years or susceptible whatever other transfer issues that could leave me stranded in the middle of a road trip. No rebuttals needed be glad that a used M8 will be posted for sale soon for those looking to get one.
Last edited by Oz Dan; Feb 9, 2019 at 05:02 PM.
Thread Starter
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Outstanding HDF Member
Joined: Nov 2018
Posts: 3,421
Likes: 726
From: Tiffin,Oh
THANK YOU! That's exactly what I was asking.