1999 - 2003 7.3L Power Stroke Diesel  
Sponsored by:
Sponsored by: DP Tuner

Small oil leak around HPOP-Where?

Thread Tools
 
Search this Thread
 
  #1  
Old 10-25-2015, 05:08 PM
SRBF150's Avatar
SRBF150
SRBF150 is offline
Laughing Gas
Thread Starter
Join Date: Nov 2010
Location: Utah
Posts: 1,159
Received 33 Likes on 21 Posts
Small oil leak around HPOP-Where?

The leak drains into the first valley of the block. This is after a cleaning and about 300 miles driving:


I thought it may be the IPR but, it's looking pretty dry:


Some more pics:



The HPOP line fittings are dry too. Where else do there the HPOP's tend to dribble a leak of oil from?
 
  #2  
Old 10-25-2015, 05:47 PM
sudsmcduff's Avatar
sudsmcduff
sudsmcduff is offline
More Turbo
Join Date: Jun 2010
Location: reedsport
Posts: 542
Likes: 0
Received 0 Likes on 0 Posts
Make sure it's not a fuel leak on top of hpop. I couldn't find my hpop leak either so I removed it and replaced all orings and gasket. Fixed issue.
 
  #3  
Old 10-25-2015, 05:53 PM
Absolute's Avatar
Absolute
Absolute is offline
Elder User
Join Date: Aug 2015
Posts: 535
Likes: 0
Received 3 Likes on 3 Posts
The other none serviceable port? The small one near the bottom on the two high press line side. Hard to see. Don't take it out unless your taking the hpop out to do it. It has a tiny check ball it holds in, and you will lose it. The check ball goes in a hole, then the bolt in question passes in front of it holding it in. The O ring on the bolt is probably gone. Starts small, but blasts out later on. Lol
 
  #4  
Old 10-25-2015, 07:26 PM
SRBF150's Avatar
SRBF150
SRBF150 is offline
Laughing Gas
Thread Starter
Join Date: Nov 2010
Location: Utah
Posts: 1,159
Received 33 Likes on 21 Posts
Originally Posted by sudsmcduff
Make sure it's not a fuel leak on top of hpop. I couldn't find my hpop leak either so I removed it and replaced all orings and gasket. Fixed issue.
I recently rebuilt the fuel bowl so it should be good. It's oil in the valley at any rate.

Originally Posted by Absolute
The other none serviceable port? The small one near the bottom on the two high press line side. Hard to see. Don't take it out unless your taking the hpop out to do it. It has a tiny check ball it holds in, and you will lose it. The check ball goes in a hole, then the bolt in question passes in front of it holding it in. The O ring on the bolt is probably gone. Starts small, but blasts out later on. Lol
I was wondering the same OR could it be the gasket?
 
  #5  
Old 10-25-2015, 08:30 PM
Absolute's Avatar
Absolute
Absolute is offline
Elder User
Join Date: Aug 2015
Posts: 535
Likes: 0
Received 3 Likes on 3 Posts
The Hpop gasket? That's not likely but possible. Are both bolts tight? The none serviceable one I'm referring too is usually the O ring at the top. But to change it you have to drop the ball so to speek. Mine kept backing out and blowing the O ring, so I used lock tite as well when I re assembled the bolt.
 
  #6  
Old 10-25-2015, 08:48 PM
Thomas White's Avatar
Thomas White
Thomas White is offline
Elder User
Join Date: Aug 2013
Posts: 588
Likes: 0
Received 9 Likes on 9 Posts
200 Miles and that little oil? I'm sure it will show itself soon enough. In addition to the fittings and lines on the HPOP, there are also three other additional places a leak can form. Those being in order of occurrence:

Not yet replaced (upgraded) Line Fittings.

The Rear Plug

The Non-Serviceable Plug

The Pressure Diaphragm O-Ring






 
  #7  
Old 10-25-2015, 09:39 PM
SRBF150's Avatar
SRBF150
SRBF150 is offline
Laughing Gas
Thread Starter
Join Date: Nov 2010
Location: Utah
Posts: 1,159
Received 33 Likes on 21 Posts
Thanks Thomas. I can rule out definitively the rear most plug, the large O ring behind the snap ring, and the HPOP fittings as the plug and O ring are clearly visible and not leaking. I changed the HPOP fittings recently with the CNC fabrication HPOP line kit and can see those are not leaking as well.

I'm guessing that it's the non-serviceable plug. If I snake my hand under the HPOP as far as I can, I do find oil wetness but since my hand is shoved in there, have no idea what I'm touching. Additionally, in that general area is some oily sludge, not a lot but some.

The oil shown is after 300 miles following a thorough rinse with Simple Green and a garden hose.

If it is the non-serviceable plug, is it truly an HPOP replacement and not the longer plug that is offered? Or, is this more of a temporary fix?

High Pressure Oil Pump (HPOP) Replacement "non-serviceable" plug on the 7.3 Ford Diesel Oil Pump
 
  #8  
Old 10-25-2015, 09:55 PM
Thomas White's Avatar
Thomas White
Thomas White is offline
Elder User
Join Date: Aug 2013
Posts: 588
Likes: 0
Received 9 Likes on 9 Posts
Originally Posted by SRBF150
Thanks Thomas. I can rule out definitively the rear most plug, the large O ring behind the snap ring, and the HPOP fittings as the plug and O ring are clearly visible and not leaking. I changed the HPOP fittings recently with the CNC fabrication HPOP line kit and can see those are not leaking as well.

I'm guessing that it's the non-serviceable plug. If I snake my hand under the HPOP as far as I can, I do find oil wetness but since my hand is shoved in there, have no idea what I'm touching. Additionally, in that general area is some oily sludge, not a lot but some.

The oil shown is after 300 miles following a thorough rinse with Simple Green and a garden hose.

If it is the non-serviceable plug, is it truly an HPOP replacement and not the longer plug that is offered? Or, is this more of a temporary fix?

High Pressure Oil Pump (HPOP) Replacement "non-serviceable" plug on the 7.3 Ford Diesel Oil Pump
They call it non-serviceable only because the HOOP requires removal for service. Ford and our sponsors both sell the o-ring kit. On a F-450 it's "servicable". All symantics.
 
  #9  
Old 10-26-2015, 07:30 AM
Absolute's Avatar
Absolute
Absolute is offline
Elder User
Join Date: Aug 2015
Posts: 535
Likes: 0
Received 3 Likes on 3 Posts
I was just about to mention that it IS serviceable with pump out. Ya beat me to it. Use lock tight. It will back out if you don't. I think that plug or bolt is only meant to be threaded once. It doesn't seem to hold the second time, so I loc tite it. Stays in now.
 
  #10  
Old 10-27-2015, 12:40 PM
brian42's Avatar
brian42
brian42 is offline
Lead Driver
Join Date: Dec 2006
Location: San Diego, CA
Posts: 7,056
Received 118 Likes on 78 Posts
I went to International and bought a replacement plug that has more threads for a better hold. Riffraff now sells this one:

Serviceable Long Threaded HPOP Plug for Ford 7.3L (94-03)
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Tailgate77478
1999 - 2003 7.3L Power Stroke Diesel
4
07-13-2020 02:47 PM
RedDevil460
1999 - 2003 7.3L Power Stroke Diesel
4
06-07-2014 11:42 AM
jhand124
1999 - 2003 7.3L Power Stroke Diesel
7
12-27-2007 11:47 AM
cdiddy
1999 - 2003 7.3L Power Stroke Diesel
14
01-01-2007 10:45 AM
BagStroke
1999 - 2003 7.3L Power Stroke Diesel
2
04-19-2004 07:26 AM



Quick Reply: Small oil leak around HPOP-Where?



All times are GMT -5. The time now is 09:15 AM.