Sumping in un-modfied HD117CI CVO
Seasoned HDF Member
Joined: Jan 2008
Posts: 13,623
Likes: 11,355
From: State of Confusion
Sorry but you need to catch your breath from the hyperventilating. I speak only for the M8 engines that sumped for me and the conditions they sumped under. I speak for no other riders and no other engines. Ill save that silly game for the Fanboyz to freak out over.
All 3 of my sumped M8 engines occurred when riding on the highway followed by 30+ mins on twisty roads with an HD twin-cooled stage 4 117. I could induce sumping AT WILL and experienced 5 different oil pump designs in the sumping engines as monitored by HD Corporate. Irrefutable facts that resulted in 3 replacement engines under warranty from HD. You want to go down the attack road again?... lets go for it.
But for the new guys, almost no one has had more experience and miles on the road with sumping M8s than I have. When YOU have experienced a sumping M8 engine, please feel free to share your experience. Until then, you have no personal experience with sumping that would be of any value to a guy dealing with his own sumping engine.
All 3 of my sumped M8 engines occurred when riding on the highway followed by 30+ mins on twisty roads with an HD twin-cooled stage 4 117. I could induce sumping AT WILL and experienced 5 different oil pump designs in the sumping engines as monitored by HD Corporate. Irrefutable facts that resulted in 3 replacement engines under warranty from HD. You want to go down the attack road again?... lets go for it.
But for the new guys, almost no one has had more experience and miles on the road with sumping M8s than I have. When YOU have experienced a sumping M8 engine, please feel free to share your experience. Until then, you have no personal experience with sumping that would be of any value to a guy dealing with his own sumping engine.
Member
Joined: Jul 2009
Posts: 4,310
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But for any 2017-2019 M8 engine that is SUSCEPTIBLE TO SUMPING, such as stage 3 and stage 4 117s that have shown signs of sumping, I am absolutely sure I can make the bike repeat those sumping symptoms.
Please go back and read my posts. I NEVER said I could make ANY M8 sump. I have always made the exact same point. If an M8 engine is susceptible to sumping...then I can make it sump! That has always been my view and it remains my view.
Last edited by Heatwave; Feb 29, 2020 at 07:17 PM.
Club Member
Joined: Apr 2016
Posts: 11,500
Likes: 8,336
From: Inland NW
NorthWestern,
Harley recognizes the problem as evidenced by all of the oil pump changes, so this is not some fiction. If it was just some isolated event I doubt they would have gone to all the trouble to redesign their pumps. S and S and Fueling seem to have correctly identified the oiling issue and have come out with very effective redesigns. It is my belief that almost all of the early M-8's can be made to sump if ridden in the manner described by "Heatwave". I have been riding Harley's since the early 90's. None of my prior bikes had this issue, and they were all ridden where we scoot along at a good pace in the twisties..
Harley recognizes the problem as evidenced by all of the oil pump changes, so this is not some fiction. If it was just some isolated event I doubt they would have gone to all the trouble to redesign their pumps. S and S and Fueling seem to have correctly identified the oiling issue and have come out with very effective redesigns. It is my belief that almost all of the early M-8's can be made to sump if ridden in the manner described by "Heatwave". I have been riding Harley's since the early 90's. None of my prior bikes had this issue, and they were all ridden where we scoot along at a good pace in the twisties..
What I disagreed with is your belief that they can all be made to do it, or now "nearly all" as you have now stated.
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Joined: Dec 2015
Posts: 69
Likes: 4
From: East, Texas
Northwestern, MJWebb,
I am not here to throw insults or to enter into a peeing contest. I came because I wanted to share my experience, I wanted to throw out some ideas on why the problem was occurring, the difficulty in dealing with Harley Customer service, and to get feedback on the experiences of others with the same issue. Apparently neither of you has experienced the sumping issue so I am sure not why the heated discourse? MJ has a new bike with the new pump so hopefully that has solved the problem. If you have not suffered the issue, then "be happy".
In the meantime my bike has now been out of service for 5 weeks.
Heatwave if you were able to get new engines, then perhaps you can help me out with a pm.
I am not here to throw insults or to enter into a peeing contest. I came because I wanted to share my experience, I wanted to throw out some ideas on why the problem was occurring, the difficulty in dealing with Harley Customer service, and to get feedback on the experiences of others with the same issue. Apparently neither of you has experienced the sumping issue so I am sure not why the heated discourse? MJ has a new bike with the new pump so hopefully that has solved the problem. If you have not suffered the issue, then "be happy".
In the meantime my bike has now been out of service for 5 weeks.
Heatwave if you were able to get new engines, then perhaps you can help me out with a pm.
Banned
Joined: Jan 2019
Posts: 3,036
Likes: 1,013
From: Nunya.
Cruiser1 you are siding with the worst lying POS on the forum ,the guy the forums changed their edit rules because of is not a good reference or ally to have .
I have it on ignore maybe you should too.
I have it on ignore maybe you should too.
Seasoned HDF Member
Joined: Jan 2008
Posts: 13,623
Likes: 11,355
From: State of Confusion
Northwestern, MJWebb,
I am not here to throw insults or to enter into a peeing contest. I came because I wanted to share my experience, I wanted to throw out some ideas on why the problem was occurring, the difficulty in dealing with Harley Customer service, and to get feedback on the experiences of others with the same issue. Apparently neither of you has experienced the sumping issue so I am sure not why the heated discourse? MJ has a new bike with the new pump so hopefully that has solved the problem. If you have not suffered the issue, then "be happy".
In the meantime my bike has now been out of service for 5 weeks.
Heatwave if you were able to get new engines, then perhaps you can help me out with a pm.
I am not here to throw insults or to enter into a peeing contest. I came because I wanted to share my experience, I wanted to throw out some ideas on why the problem was occurring, the difficulty in dealing with Harley Customer service, and to get feedback on the experiences of others with the same issue. Apparently neither of you has experienced the sumping issue so I am sure not why the heated discourse? MJ has a new bike with the new pump so hopefully that has solved the problem. If you have not suffered the issue, then "be happy".
In the meantime my bike has now been out of service for 5 weeks.
Heatwave if you were able to get new engines, then perhaps you can help me out with a pm.
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Cruiser
Joined: Dec 2014
Posts: 136
Likes: 11
From: Greenville, SC
Amazing to me HE did not get the M8 right out of the gate. It seems HD does not test a new motor design. They do not care about their customers. I have two TC 88 bikes with cam chain tensioner faulty design. Since HD did nothing to help customers with this issue, I will never buy another HD product.
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Joined: Dec 2015
Posts: 69
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From: East, Texas
MJWeb.
There you go again with the inflammatory rhetoric, insinuating that I am " beating the living **** out of the engine". Seems like you are deliberately attempting to troll on the subject.
There you go again with the inflammatory rhetoric, insinuating that I am " beating the living **** out of the engine". Seems like you are deliberately attempting to troll on the subject.