Milwaukee Eight (M8) 2017 and up M8 Air and Liquid Cooled discussion
Sponsored by:
Sponsored by:

Sumping in un-modfied HD117CI CVO

Thread Tools
 
Search this Thread
 
Old Mar 6, 2020 | 12:07 PM
  #121  
Heatwave's Avatar
Heatwave
Member
Joined: Jul 2009
Posts: 4,310
Likes: 1,079
Default

Originally Posted by mjwebb
yup, over the years many have asked many times..I don't recall anyone either that was willing to do so..I've posted many R.O.s from our dealership for our problems..took all of a couple minutes, such a simple follow through...after awhile, of course some reports have raised suspicion..but guess we should just blindly believe everything we read on the internet..if this happened to me and was asked to post the R.O. I would share it in a heartbeat, no big deal at all...but so many just couldn't for some reason or another
In all 3 of my warranty engine replacements, I was never given a RO from the dealer service desk. The bike engine was replaced and the keys were returned to me. I think the last thing HD wanted was a hardcopy of warranty repair for an engine replacement (or in my case multiple engine replacements) out on the web.

Should I have demanded a RO printed out?? I suppose so but when you've been waiting weeks or months for your bike, and they finally have it detailed waiting for you in front of the dealership, and then they hand you the keys and say no charge, well... demanding a service order is the last thing on your mind.... at least until I needed the next engine replacement.

I would go back and ask for the original records now but my dealership (one of the oldest HD dealerships on the East Coast and the oldest one in NJ) sadly closed its doors last Fall.
 

Last edited by Heatwave; Mar 6, 2020 at 12:43 PM.
Reply
Old Mar 6, 2020 | 12:23 PM
  #122  
Cruiser1's Avatar
Cruiser1
Thread Starter
|
Advanced
Joined: Dec 2015
Posts: 69
Likes: 4
From: East, Texas
Default

So many "Doubting Thomas's". Here is the initial RO for my bike. I have not gotten a copy of the final one. I don't think it would be appropriate to post the RO's for the other two owners.

Initial RO for engine sumping.
 

Last edited by Cruiser1; Mar 6, 2020 at 12:25 PM.
Reply
Old Mar 6, 2020 | 12:42 PM
  #123  
mjwebb's Avatar
mjwebb
Seasoned HDF Member
15 Year Member
Photogenic
Community Builder
Top Answer: 1
Joined: Jan 2008
Posts: 13,620
Likes: 11,353
From: State of Confusion
Default

Originally Posted by Cruiser1
So many "Doubting Thomas's". Here is the initial RO for my bike. I have not gotten a copy of the final one. I don't think it would be appropriate to post the RO's for the other two owners.

Initial RO for engine sumping.
cool, thx..easy on the judging..we've been on this topic for several years and you're just entering into the whole mess..sincerely glad your bike problem is getting addressed
 
Reply
Old Mar 6, 2020 | 12:47 PM
  #124  
Cruiser1's Avatar
Cruiser1
Thread Starter
|
Advanced
Joined: Dec 2015
Posts: 69
Likes: 4
From: East, Texas
Default

"More bad news"

I have just returned from the shop to check on my bike. I will ride it this afternoon.

It turns out that the 3rd bike with the 114 inch stage kit that sumped had the latest new 8 lobe 2020 pump installed at the time of the upgrade. This is the first instance that I have heard of a failure with the new pump. After talking with the mechanics I was not encouraged, as the redesign may not be enough to cure the problem.

Here are the pictures of the sumping stock 2019 CVO with a partial tear down. I took some close ups of the pistons. You will note that the skirts are cracked on both pistons, with portions of the skirt actually broken off.

Bad piston 1

Partial tear down of sumping bike

Bad piston

Partial tear down 2
2
 
Reply
Old Mar 6, 2020 | 12:50 PM
  #125  
Cruiser1's Avatar
Cruiser1
Thread Starter
|
Advanced
Joined: Dec 2015
Posts: 69
Likes: 4
From: East, Texas
Default

Thanks MJ, that's the nicest thing you have said to me so far
 
Reply
Old Mar 6, 2020 | 12:50 PM
  #126  
BrandonSmith's Avatar
BrandonSmith
HDF Community Team
5 Year Member
Active Streak: 30 Days
Community Favorite
Top Answer: 5
Joined: Mar 2017
Posts: 7,824
Likes: 4,383
From: Texas
Community Team
Default

Thank you for sharing this information.

RE sumping with new pump - I can see the shitstorm coming.
 
Reply
Old Mar 6, 2020 | 12:55 PM
  #127  
mjwebb's Avatar
mjwebb
Seasoned HDF Member
15 Year Member
Photogenic
Community Builder
Top Answer: 1
Joined: Jan 2008
Posts: 13,620
Likes: 11,353
From: State of Confusion
Default

Originally Posted by BrandonSmith
Thank you for sharing this information.

RE sumping with new pump - I can see the shitstorm coming.
I don't think any definitive conclusions were ever drawn that the oil pump was the single related root cause..there could very well be another explanation or a combination of things with this one so no way to believe the new oil pump isn't 'A' solution to a particular problem..those Stage 3 and 4 kits don't exactly appear to have the best track record leaving the factory with tight tolerances and specs right?
 
Reply
Old Mar 6, 2020 | 01:10 PM
  #128  
Cruiser1's Avatar
Cruiser1
Thread Starter
|
Advanced
Joined: Dec 2015
Posts: 69
Likes: 4
From: East, Texas
Default

Brandon, I don't think so. I am sharing my experience with my bike so that others may be aware of developments on the sumping/oil issue. I understand that some are testing my veracity, since I am a new and untested member.
 
Reply
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-1

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-2

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

 Verdad Gallardo
story-4

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

 Verdad Gallardo
story-5

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-6

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-7

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-8

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
story-9

Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

 Verdad Gallardo
Old Mar 6, 2020 | 01:27 PM
  #129  
Cruiser1's Avatar
Cruiser1
Thread Starter
|
Advanced
Joined: Dec 2015
Posts: 69
Likes: 4
From: East, Texas
Default

mjwebb, I don't normally do internal upgrades on any of my bikes. I figure that the manufacturer over designs the engine with a margin to provide long term reliability. With the 117, I expected to have plenty of power and torque with the stock engine. Each time that an upgrade is performed one eats into that margin. Not only is the main engine affected, but so is the clutch, transmission, and rear drive. Harley has come out with these stage 3 and 4 kits to keep up with the competition and the after market. In a way they are their own worst enemy. What is disconcerting is that even using all Harley parts, service, and no internal work my bike still has had major engine issues.
The bike has now been repaired, but if the issue is more than an oil pump problem, I may be back to square one in a short time.
 
Reply
Old Mar 6, 2020 | 01:34 PM
  #130  
Heatwave's Avatar
Heatwave
Member
Joined: Jul 2009
Posts: 4,310
Likes: 1,079
Default

Originally Posted by Cruiser1
"More bad news"

I have just returned from the shop to check on my bike. I will ride it this afternoon.

It turns out that the 3rd bike with the 114 inch stage kit that sumped had the latest new 8 lobe 2020 pump installed at the time of the upgrade. This is the first instance that I have heard of a failure with the new pump. After talking with the mechanics I was not encouraged, as the redesign may not be enough to cure the problem.

Here are the pictures of the sumping stock 2019 CVO with a partial tear down. I took some close ups of the pistons. You will note that the skirts are cracked on both pistons, with portions of the skirt actually broken off.

Bad piston 1

Partial tear down of sumping bike

Bad piston

Partial tear down 2
2
A few questions:
- By chance did the mechanics reference if the piston oil jets were leaking?
- Is the shop that did the install of the original 2020 oil pump upgrade, the same one doing the teardown?
- Do you know for a fact that the engine with the 2020 8-lobe oil pump that failed was due to sumping and not some other cause?
- If it failed from sumping, they should have a record of the ounces of oil they drained from the Crank Position Sensor before they started the tear down.
- Can you ask how much oil was in the crankcase when they drained it?
 

Last edited by Heatwave; Mar 6, 2020 at 01:39 PM.
Reply



All times are GMT -5. The time now is 05:32 PM.

story-0
7 Surprising Harley-Davidson Products that Are Not Motorcycles

Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.

By Verdad Gallardo | 2026-04-29 16:50:35


VIEW MORE
story-1
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-2
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-3
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-4
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-5
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-6
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-7
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-8
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE
story-9
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

Slideshow: Graeme Billington's left-hand-drive Shovelhead is as much about problem-solving as it is about classic Harley form.

By Verdad Gallardo | 2025-12-30 11:27:08


VIEW MORE