Harley Davidson Forums

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

Engine Temp

Thread Tools
 
Search this Thread
 
Old Oct 19, 2020 | 06:13 AM
Share
  #1  
Irakli Irakli's Avatar
Irakli Irakli
Thread Starter
|
Intermediate
Joined: Mar 2020
Posts: 35
Likes: 1
From: Tbilisi
Default Engine Temp
Hi,
I installed fan assisted oil cooler, but as I see it does not help to keep engine cooler.
I have FP3 and monitoring engine temperature.
At idle temp raised up to 332f(167c). When I checked engine head temp by temp gun, front was about 332f(167c) and rear 275f (135c) and FP3 was showing 332f(167c) - front cylinder temp. I have enabled EITMS.
How could it be , as I know only rear cylinder has temp sensor ?
Oil radiator temp was around 154f(68c), its good, but its seems fan only cools oil, not engine.

 
Reply
0
Old Oct 19, 2020 | 06:26 AM
Share
  #2  
702's Avatar
702
Seasoned HDF Member
Joined: May 2018
Posts: 5,814
Likes: 7,147
From: Las Vegas
Default
Originally Posted by Irakli Irakli
Hi,
I installed fan assisted oil cooler, but as I see it does not help to keep engine cooler.
I have FP3 and monitoring engine temperature.
At idle temp raised up to 332f(167c). When I checked engine head temp by temp gun, front was about 332f(167c) and rear 275f (135c) and FP3 was showing 332f(167c) - front cylinder temp. I have enabled EITMS.
How could it be , as I know only rear cylinder has temp sensor ?
Oil radiator temp was around 154f(68c), its good, but its seems fan only cools oil, not engine.
There's your answer, an oil cooler cools the oil. But, if you installed the HD cooler, did you have the ECM flashed to make it work?
 
Reply
0
Old Oct 19, 2020 | 07:02 AM
Share
  #3  
Irakli Irakli's Avatar
Irakli Irakli
Thread Starter
|
Intermediate
Joined: Mar 2020
Posts: 35
Likes: 1
From: Tbilisi
Default
Originally Posted by 702
There's your answer, an oil cooler cools the oil. But, if you installed the HD cooler, did you have the ECM flashed to make it work?
Yes , of course. Fan is working and blowing hot air.
 
Last edited by Irakli Irakli; Oct 19, 2020 at 07:05 AM.
Reply
0
Old Oct 19, 2020 | 07:37 AM
Share
  #4  
mjwebb's Avatar
mjwebb
Seasoned HDF Member
15 Year Member
Photogenic
Community Builder
Top Answer: 1
Joined: Jan 2008
Posts: 13,724
Likes: 11,522
From: State of Confusion
Default
Originally Posted by Irakli Irakli
Hi,
I installed fan assisted oil cooler, but as I see it does not help to keep engine cooler.
I have FP3 and monitoring engine temperature.
At idle temp raised up to 332f(167c). When I checked engine head temp by temp gun, front was about 332f(167c) and rear 275f (135c) and FP3 was showing 332f(167c) - front cylinder temp. I have enabled EITMS.
How could it be , as I know only rear cylinder has temp sensor ?
Oil radiator temp was around 154f(68c), its good, but its seems fan only cools oil, not engine.
when the FAOC came out Steve Cole performed some before and after testing

Conditions:
Ambient temperature during testing low - mid 70's
In Town riding with little traffic but normal stop lights
Speed limited to posted speed limits (35 - 45 mph)

Before Upgrade Results:
Measured Peak Engine temperature = 340 F
Measured Peak Oil Sump temperature = 267 F
Measured Peak Head Oil Return temperature = 290 F

After Upgrade Results:
Measured Peak Engine temperature = 302 F
Measured Peak Oil Sump temperature = 201 F
Measured Peak Head Oil Return temperature = 240 F
 
Reply
0
Old Oct 19, 2020 | 07:47 AM
Share
  #5  
smitty901's Avatar
smitty901
Seasoned HDF Member
Veteran: Army
15 Year Member
Liked
Community Favorite
Joined: Feb 2008
Posts: 23,004
Likes: 11,441
Default
Originally Posted by Irakli Irakli
Hi,
I installed fan assisted oil cooler, but as I see it does not help to keep engine cooler.
I have FP3 and monitoring engine temperature.
At idle temp raised up to 332f(167c). When I checked engine head temp by temp gun, front was about 332f(167c) and rear 275f (135c) and FP3 was showing 332f(167c) - front cylinder temp. I have enabled EITMS.
How could it be , as I know only rear cylinder has temp sensor ?
Oil radiator temp was around 154f(68c), its good, but its seems fan only cools oil, not engine.
Of course we have been tell people this of a while. Just ride and forget about it. You are being played. The heads get hot the oil carries away some heat but not enough to make any real difference once fully at operating temps. The design is to keep engine at operating temps .
 
Reply
0
Old Oct 19, 2020 | 10:19 AM
Share
  #6  
SoCaRider's Avatar
SoCaRider
Road Captain
Joined: Feb 2020
Posts: 615
Likes: 209
From: California
Default
on my soft tail I average 270" in 90" weather
 
Reply
0
Old Oct 19, 2020 | 04:26 PM
Share
  #7  
Irakli Irakli's Avatar
Irakli Irakli
Thread Starter
|
Intermediate
Joined: Mar 2020
Posts: 35
Likes: 1
From: Tbilisi
Default
Thinking to add some fan on cylinder to cool engine down to 270f.
Think 270 is enough for normal operating engine.
 
Reply
0

Trending Topics

Old Oct 19, 2020 | 05:47 PM
Share
  #8  
Irakli Irakli's Avatar
Irakli Irakli
Thread Starter
|
Intermediate
Joined: Mar 2020
Posts: 35
Likes: 1
From: Tbilisi
Default
what about this ?
At idle temp raised up to 332f(167c). When I checked engine head temp by temp gun, front was about 332f(167c) and rear 275f (135c) and FP3 was showing 332f(167c) - front cylinder temp. I have enabled EITMS.
How could it be , as I know only rear cylinder has temp sensor ?
 
Reply
0
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

10 Most Awkward-Looking Motorcycles Ever Built

 Verdad Gallardo
story-1

Jason Momoa Is Turning Classic Harleys Into PHEVs

 Verdad Gallardo
story-2

Harley-Davidson Fat Boy Becomes a Dark, Decepticon-Inspired Custom

 Verdad Gallardo
story-3

6 Weirdest Harley-Davidsons Ever Sold to the Public

 Verdad Gallardo
story-4

7 Times Harley-Davidson Chucked Tradition Out the Window

 Verdad Gallardo
story-5

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-6

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-7

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-8

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

 Verdad Gallardo
story-9

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

 Verdad Gallardo
Old Oct 19, 2020 | 07:59 PM
Share
  #9  
Keithhu's Avatar
Keithhu
Seasoned HDF Member
15 Year Member
Liked
Loved
Community Favorite
Joined: Sep 2009
Posts: 17,154
Likes: 6,175
From: SE Michigan
Default
Measure less and ride more, I say.
 
Reply
0
Old Oct 19, 2020 | 08:19 PM
Share
  #10  
NorthWestern's Avatar
NorthWestern
Club Member
10 Year Member
Loved
Community Favorite
Top Answer: 10
Joined: Apr 2016
Posts: 11,659
Likes: 8,468
From: Inland NW
Riders Club Member
Default

 
Reply
0



Advanced Search
Reply Closed Thread Share
Forum Jump

All times are GMT -5. The time now is 03:14 AM.

story-0
10 Most Awkward-Looking Motorcycles Ever Built

Slideshow: Not every motorcycle can be a design icon, and these machines prove that bold styling doesn't always age gracefully.

By Verdad Gallardo | 2026-06-12 11:58:41


VIEW MORE
story-1
Jason Momoa Is Turning Classic Harleys Into PHEVs

Slideshow: Jason Momoa's latest restoration project blends 1920s Harley-Davidsons with modern electric technology, creating some of the most unusual hybrid motorcycles ever built.

By Verdad Gallardo | 2026-06-10 17:18:58


VIEW MORE
story-2
Harley-Davidson Fat Boy Becomes a Dark, Decepticon-Inspired Custom

Slideshow: Killer Custom's latest build relies on styling changes rather than performance upgrades, giving the cruiser an entirely different personality.

By Verdad Gallardo | 2026-06-03 18:28:05


VIEW MORE
story-3
6 Weirdest Harley-Davidsons Ever Sold to the Public

Slideshow: From military-inspired singles to scooters and three-wheel utility vehicles, these Harleys took the company far outside its comfort zone.

By Verdad Gallardo | 2026-06-02 18:34:10


VIEW MORE
story-4
7 Times Harley-Davidson Chucked Tradition Out the Window

Slideshow: Harley-Davidson built its reputation on nostalgia, but every so often, the company took a hard left turn into the future.

By Verdad Gallardo | 2026-05-20 11:18:19


VIEW MORE
story-5
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-6
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-7
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-8
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-9
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