Harley Davidson Forums

EVO All Evo Model Discussion

Oil pressure problems

Thread Tools
 
Search this Thread
 
Old Jul 31, 2019 | 06:14 PM
Share
  #1  
TRU's Avatar
TRU
Thread Starter
|
Stage III
Joined: Jul 2019
Posts: 3
Likes: 0
From: ABQ NM
Default Oil pressure problems
why is my road king shooting out the oil cap
 
Reply
0
Old Jul 31, 2019 | 06:37 PM
Share
  #2  
hdvespa's Avatar
hdvespa
Cruiser
Joined: Jul 2006
Posts: 147
Likes: 11
Default
My guess would be crankcase pressure. Year of bike and mileage?
 
Reply
0
Old Jul 31, 2019 | 06:45 PM
Share
  #3  
Dan89FLSTC's Avatar
Dan89FLSTC
Seasoned HDF Member
Veteran: Navy
Active Streak: 30 Days
Top Answer: 3
Top Answer: 5
Joined: May 2008
Posts: 21,215
Likes: 12,809
From: South Carolina
Default
Do you mean... why is oil shooting out the filler neck?

Have you done any work on the bike recently?

Did the issue just start?

How much oil is in the tank?

Are you still here?
 
Reply
0
Old Jul 31, 2019 | 07:15 PM
Share
  #4  
TRU's Avatar
TRU
Thread Starter
|
Stage III
Joined: Jul 2019
Posts: 3
Likes: 0
From: ABQ NM
Default
I am losing my oil cap dipstick, the pressure builds up then shot guns it out about 15 feet, its a 2004 road king
 
Reply
0
Old Jul 31, 2019 | 07:16 PM
Share
  #5  
TRU's Avatar
TRU
Thread Starter
|
Stage III
Joined: Jul 2019
Posts: 3
Likes: 0
From: ABQ NM
Default
it has 30k on the miles
 
Reply
0
Old Jul 31, 2019 | 08:23 PM
Share
  #6  
Beemervet's Avatar
Beemervet
Ultimate HDF Member
Veteran: Army
Joined: May 2006
Posts: 6,590
Likes: 444
From: Ohio
Default
Probably too much oil.
....and BTW, this is the EVO forum. We know a couple of things, but Twinkies, not so much.
 
Reply
1
Old Jul 31, 2019 | 08:45 PM
Share
  #7  
hdvespa's Avatar
hdvespa
Cruiser
Joined: Jul 2006
Posts: 147
Likes: 11
Default
Iown an 85 Evo and a 2002 Flhtc twin cam with ss510 cams and 95 inch. I also changed the vent tube that comes acoss into the fill neck to a smaller dia hose. I have the same problem when I get on the throttle hard. I believe the issue is crankcase pressure from that vent line. I fixed mine by making a clamp to prevent the dipstick from blowing out. The newer twin cams switched to a threaded dipstick
 
Reply
0

Trending Topics

Old Aug 1, 2019 | 06:12 AM
Share
  #8  
splattttttt's Avatar
splattttttt
Ultimate HDF Member
Veteran: Army
Joined: Jul 2014
Posts: 5,649
Likes: 430
From: MASS_hole
Default
Threaded oil cap on a newer twin cam? NOT!
Only on sportsters.

For the original poster... Crank case breathers clogged. But can’t imagine why?. Unless metal shavings got in the passages?
 
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 Aug 1, 2019 | 07:28 AM
Share
  #9  
Dan89FLSTC's Avatar
Dan89FLSTC
Seasoned HDF Member
Veteran: Navy
Active Streak: 30 Days
Top Answer: 3
Top Answer: 5
Joined: May 2008
Posts: 21,215
Likes: 12,809
From: South Carolina
Default
Originally Posted by splattttttt
Threaded oil cap on a newer twin cam? NOT!
Only on sportsters.
The oil cap is threaded on my `16 Road King...
 
Reply
0
Old Aug 1, 2019 | 08:09 AM
Share
  #10  
98hotrodfatboy's Avatar
98hotrodfatboy
Seasoned HDF Member
15 Year Member
Liked
Loved
Joined: Mar 2010
Posts: 21,168
Likes: 7,676
From: Poolville
Default
Wasn't there an updated version of Reed valves for the breathers to cure that problem?
 
Reply
0



Advanced Search
Reply Closed Thread Share
Forum Jump

All times are GMT -5. The time now is 08:54 PM.

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