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Author Topic: Another 114 M8 Bad Oil Pump  (Read 13140 times)

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Rooster

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Re: Another 114 M8 Bad Oil Pump
« Reply #15 on: October 05, 2017, 05:04:14 PM »

Instead of using the word Recall, they used the word Campaign a number of times.  :huepfenlol2:
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sadunbar

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Re: Another 114 M8 Bad Oil Pump
« Reply #16 on: October 05, 2017, 07:40:58 PM »

Instead of using the word Recall, they used the word Campaign a number of times.  :huepfenlol2:

"Product Enhancement" was the term they came up with when they could not keep head gaskets from blowing and valves from sticking back in 2007...  "Recall" is not in the MOCO dictionary...
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Re: Another 114 M8 Bad Oil Pump
« Reply #17 on: October 05, 2017, 08:06:02 PM »

My pump went out after only 800 miles.
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Re: Another 114 M8 Bad Oil Pump
« Reply #18 on: October 05, 2017, 08:54:14 PM »

Are the new pumps holding up? I have read a number of posts on this forum as well as other forums where people have had multiple pumps fail.
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2002FXDWG3

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Re: Another 114 M8 Bad Oil Pump
« Reply #19 on: October 05, 2017, 09:00:55 PM »

Are these M8 pumps actually "physically" failing somehow of just another crap design?  I have not yet seen one of these confirmed sumpers removed.
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sadunbar

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Re: Another 114 M8 Bad Oil Pump
« Reply #20 on: October 05, 2017, 09:19:50 PM »

I have yet to hear what the actual differences are between the various design oil pumps...  Anyone have any pictures of design version 1, 2 and 3 oil pump?
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2002FXDWG3

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Re: Another 114 M8 Bad Oil Pump
« Reply #21 on: October 05, 2017, 09:29:41 PM »

Not sure about the M8 but here is some info on the TC oil pump evolution:

Oil flow and scavenging (per H-D):
1. stock (oil pump #26035-99B) to 96ci (oil pump #16037-06) = +8% flow & +22% scavenging
2. 96ci (oil pump #16037-06) to Screamin' Eagle (oil pump #62400001) = +16% flow & +29% scavenging
3. stock (oil pump #26035-99B) to Screamin' Eagle (oil pump #62400001) = +23% flow & +50% scavenging
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Re: Another 114 M8 Bad Oil Pump
« Reply #22 on: October 05, 2017, 09:36:40 PM »

I have yet to hear what the actual differences are between the various design oil pumps...  Anyone have any pictures of design version 1, 2 and 3 oil pump?

Nor I.  Yet to see a single design brief, review doc nor anything else that actually documents anything other than "different."  Hard to get the warm fuzzies when the company passing the dong says "puff puff" but won't say what's in the bowl.

Not sure about the M8 but here is some info on the TC oil pump evolution:

Oil flow and scavenging (per H-D):
1. stock (oil pump #26035-99B) to 96ci (oil pump #16037-06) = +8% flow & +22% scavenging
2. 96ci (oil pump #16037-06) to Screamin' Eagle (oil pump #62400001) = +16% flow & +29% scavenging
3. stock (oil pump #26035-99B) to Screamin' Eagle (oil pump #62400001) = +23% flow & +50% scavenging

..and have no clue what the parts iteration from an entirely different engine tells us.
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2002FXDWG3

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Re: Another 114 M8 Bad Oil Pump
« Reply #23 on: October 05, 2017, 09:38:29 PM »

It tells me that Harley has a history of oil pump design issues with emphasis on scavenging.
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grc

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Re: Another 114 M8 Bad Oil Pump
« Reply #24 on: October 05, 2017, 09:50:14 PM »


Can't help but wonder if the issue isn't the same one seen on the 2007 and later Twin Cams, excessive pinion shaft runout.  I haven't seen any information indicating they changed the design or production tooling and process for the M8.

I'd still love to know why the problem becomes worse after installing a performance kit.  Very slight increase in displacement shouldn't make any difference to the oil pump, perhaps running higher rpm with the kit cams could cause more oil to pool in the crankcase but I doubt it.  Nothing about this issue makes sense, and unfortunately it is highly unlikely H-D will ever explain what's going on.

Jerry
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Twolanerider

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Re: Another 114 M8 Bad Oil Pump
« Reply #25 on: October 05, 2017, 09:51:49 PM »

It tells me that Harley has a history of oil pump design issues with emphasis on scavenging.


Maybe.  But there is more than 15 years between the efforts.  So not just different design effort but different generations of design engineers and likely even corporate processes.  If anything it tells me the company can't master a relatively simple system that the rest of the automotive industry had for generations; and that they are, almost willfully, willing to compound the problem by not isolating and then correcting it in a major evolutionary redesign of the product.  Or, to put it differently, it's not a design problem at all.  It's an illustration of an industrial and corporate carelessness that is simply stunning in the nature of its repetition.
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Re: Another 114 M8 Bad Oil Pump
« Reply #26 on: October 07, 2017, 10:49:14 PM »

My oil pump is being replaced on my 2017 CVO Street Glide after a big 1200 miles.  What other damage should they be looking for because of this failure?
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CVOhog1

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Re: Another 114 M8 Bad Oil Pump
« Reply #27 on: October 08, 2017, 08:18:45 PM »

For starters, the dealer should do a compression leak down. That would show any potential scouring of the cylinders. They should also check the smoothness of the crack turning. 
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Re: Another 114 M8 Bad Oil Pump
« Reply #28 on: October 09, 2017, 08:54:01 AM »

My oil pump is being replaced on my 2017 CVO Street Glide after a big 1200 miles.  What other damage should they be looking for because of this failure?

How did it "fail", as in what were the circumstances?  Did you actually lose all oil pressure, or did you have it checked for sumping and they found it to be out-of-spec, or  :nixweiss:

Jerry
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Re: Another 114 M8 Bad Oil Pump
« Reply #29 on: October 09, 2017, 02:45:21 PM »

My pump turned the oil light in at idle. The new pump has worked with no problems for 14,200 miles.
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Bill
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