Best method for sealing threads that are in contact with oil??? - Ford Powerstroke Diesel Forum
 
LinkBack Thread Tools Display Modes
post #1 of 10 Old 07-03-2011, 05:09 PM Thread Starter
Compression Ignition Addict
 
Dante04SRT's Avatar
 
Join Date: May 2011
Location: East Tennessee
Posts: 735
Thanks: 1
Thanked 28 Times in 4 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 9 reviews
Best method for sealing threads that are in contact with oil???

I have a billet oil cap with the 1/8 NPT port on the top for my oil temp sending unit.

I keep having an issue with oil getting by the teflon that I'm using to seal the sending unit to the cap.

I've used a little tape, a lot of tape and every combination in between and I keep developing an oil leak at the threads of the sending unit!

Is standard teflon not meant for oil contact? If so, what is a better product? If oil was passing over it, it probably wouldn't be a problem but it's being forced against the sending unit (design of the cap) and therefore keeps springing a leak!

HELP!

-Brian

2005 F350 6.0 CC/SB Lariat 4x4
EGR Delete
ARP Studs
All updated Ford internals
Edge Insight CTS2
Swamp's 58V FICM
SCT X3
TGC 2.5" Level Kit
Zerex EC-1 ELC
08+ Step Tailgate
08+ All Power Mirrors (Factory Functions, too)
2011 Rear Bumper
B&W Turnover Ball
8oz Stanadyne Performance w/each fillup
HOW TO: Install & Wire 2008+ PF/PT mirrors and making them work/look factory
HOW TO: 2008+ Taillight wiring adapter
Dante04SRT is offline  
post #2 of 10 Old 07-03-2011, 07:20 PM
Compression Ignition Addict
 
smokersteve's Avatar
 
Join Date: Nov 2008
Location: California
Posts: 4,335
Thanks: 0
Thanked 7 Times in 7 Posts
Mentioned: 0 Post(s)
Quoted: 19 Post(s)
Feedback Score: 0 reviews
any auto store will have thread locker for oil applications.
smokersteve is offline  
post #3 of 10 Old 07-04-2011, 04:47 AM
Compression Ignition Addict
 
npccpartsman's Avatar
 
Join Date: Oct 2006
Location: Gods Country/Home
Posts: 1,713
Thanks: 22
Thanked 13 Times in 13 Posts
Mentioned: 0 Post(s)
Quoted: 5 Post(s)
Feedback Score: 1 reviews
I've never EVER had an issue with motor oil and teflon tape, and I've used a BUNCH of teflon tape in a lot higher pressure situations than this. Are you sure you don't have another problem like a crack in the cap or bad sending unit?? Over tightening pipe threads in aluminum can do that very quickly.

I Bleed Razorback Red

Ford Makes It, International Shakes It, Casserly Fuels It, KC Turbo Spools It, SCT Tunes It, and Trucks Unlimited keeps her Rockin the Road
npccpartsman is offline  
post #4 of 10 Old 07-04-2011, 05:11 AM
Compression Ignition Addict
 
rem1981's Avatar
 
Join Date: Jun 2010
Location: Northern Illinois
Posts: 378
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by npccpartsman View Post
I've never EVER had an issue with motor oil and teflon tape, and I've used a BUNCH of teflon tape in a lot higher pressure situations than this. Are you sure you don't have another problem like a crack in the cap or bad sending unit?? Over tightening pipe threads in aluminum can do that very quickly.
I can't say that I have ever had that issue with Teflon tape either. Hell, I didn't even know they made a tape specifically for oil applications. I'm wondering if there isn't another issue as well.

I dream of a better tomorrow, where chickens can cross the road and not be questioned about their motives.
rem1981 is offline  
post #5 of 10 Old 07-04-2011, 05:23 AM
Compression Ignition Addict
 
APEowner's Avatar
 
Join Date: Feb 2009
Posts: 258
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Tape really should work but I've found that Permatex Teflon thread sealer is a bit more forgiving on less than perfect threads.

2001 F-250
Stock for now
APEowner is offline  
post #6 of 10 Old 07-04-2011, 03:03 PM
Powerstroke.org Fanatic
 
Join Date: May 2011
Posts: 129
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Check for cracks. Teflon tape if over used/ tightened will cause cracks in fittings.
I always like using liquid teflon/ paste.

esuitt is offline  
post #7 of 10 Old 07-05-2011, 03:00 AM Thread Starter
Compression Ignition Addict
 
Dante04SRT's Avatar
 
Join Date: May 2011
Location: East Tennessee
Posts: 735
Thanks: 1
Thanked 28 Times in 4 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 9 reviews
The cap and sender are brand new, no cracks/damage - This has leaked from out of the gate...

-Brian

2005 F350 6.0 CC/SB Lariat 4x4
EGR Delete
ARP Studs
All updated Ford internals
Edge Insight CTS2
Swamp's 58V FICM
SCT X3
TGC 2.5" Level Kit
Zerex EC-1 ELC
08+ Step Tailgate
08+ All Power Mirrors (Factory Functions, too)
2011 Rear Bumper
B&W Turnover Ball
8oz Stanadyne Performance w/each fillup
HOW TO: Install & Wire 2008+ PF/PT mirrors and making them work/look factory
HOW TO: 2008+ Taillight wiring adapter
Dante04SRT is offline  
post #8 of 10 Old 07-05-2011, 12:19 PM
Compression Ignition Addict
 
rem1981's Avatar
 
Join Date: Jun 2010
Location: Northern Illinois
Posts: 378
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Don't take this the wrong way, but are you sure you are using the right fitting? Sometimes the metric/standard equivalent of the right fitting is real close, but not close enough for a proper seal. Just throwing ideas out there.

I dream of a better tomorrow, where chickens can cross the road and not be questioned about their motives.
rem1981 is offline  
post #9 of 10 Old 07-05-2011, 01:10 PM
Compression Ignition Addict
 
dazdillenger's Avatar
 
Join Date: Feb 2011
Location: upstate ny
Posts: 2,254
Thanks: 0
Thanked 3 Times in 3 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 7 reviews
Use the liquid teflon, let it sit overnight. Problem solved!



2005 Lariat CCSB F-350 SRW
300,000 miles and going strong

Exterior
12" fabtech lift with 40" Xterrain's on M/T classic locks, Adjustable track bar, Bilstein 7100 reservoir shocks

Performance
Edge juice/attitude CTS, SCT with ID tunes, Snow meth. injection, Diamond eye 4" exhaust, 03 turbo, ARP studs, Sinister coolant filter

Interior
2010 stone seats/console, pioneer avic d3 with backup camera/bluetooth

Misc.
Viair 450c compressor, dual 2.5 gallon tanks, air horns rated @115db
dazdillenger is offline  
post #10 of 10 Old 07-06-2011, 04:09 PM
Compression Ignition Addict
 
Join Date: Mar 2011
Location: wichita ks
Posts: 971
Thanks: 0
Thanked 6 Times in 4 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
------- Loc-tite 545--------- Clean both threads with fast drying contact cleaner. Apply Loc-Tite 545 and assemble then let cure for 24 hrs. I have used this for hydraulic applications to 10000 psi works every time. Teflon tape should work unless your threads are damaged.

Thinking about this for a second. Doesn't an 05 have a factory oil temp sender? Be very very very sure that your new cap is the same in every way as the OEM cap. There have been a lot of crazy problems traced back to using a taller than OEM oil filter cap because it may not let the filter seal correctly. I have also heard of issues with the drain back valve hanging open.

We could use pics of the cap and sending unit. from your 1st post sounds like you might need an O-ring????

Last edited by HAM_RADIO_MAN; 07-06-2011 at 04:54 PM.
HAM_RADIO_MAN is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome