Plumbers Tape on Diff Fill Bolt - M.net question - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 08-18-2008, 06:01 PM   #1
Elite Member
Thread Starter
iTrader: (6)
 
Join Date: Sep 2007
Location: CA
Posts: 1,990
Total Cats: 9
Default Plumbers Tape on Diff Fill Bolt - M.net question

Does anyone foresee any problems that may be encountered w/ this? I see a slow leak from a poorly helicoiled fill bolt that's stripped. It can tighten but eventually loosens if given enough torque. I don't think the diff gets very hot where it will burn off the tape, right? I was thinking first:

1) plumber's tape
then
2) oversized bolt
then
3) JB welding it

Would prefer trying the most conservative then going on to other things right now.
kenzo42 is offline   Reply With Quote
Old 08-18-2008, 06:22 PM   #2
Elite Member
iTrader: (12)
 
Join Date: Aug 2006
Location: Central-ish VA
Posts: 4,449
Total Cats: 16
Default

The white stuff will melt in petroleum. They make a special pink teflon tape for use with petroleum products. Use that.
neogenesis2004 is offline   Reply With Quote
Old 08-18-2008, 06:24 PM   #3
Elite Member
iTrader: (46)
 
Stein's Avatar
 
Join Date: Dec 2007
Location: Nebraska
Posts: 4,812
Total Cats: 138
Default

Is it a wound wire-type heli-coil or one of the solid machined type? If it is the wire, it still may leak if it leaks on the "outside" of the helicoil. It may mot be leaking on the "inside" where you will be taping it.

That being the case, teflon tape should be fine. There is a "pink" tape that handles a higher heat and more chemicals than the generic stuff.
Stein is offline   Reply With Quote
Old 08-18-2008, 09:36 PM   #4
Elite Member
Thread Starter
iTrader: (6)
 
Join Date: Sep 2007
Location: CA
Posts: 1,990
Total Cats: 9
Default

Quote:
Originally Posted by Stein View Post
Is it a wound wire-type heli-coil or one of the solid machined type? If it is the wire, it still may leak if it leaks on the "outside" of the helicoil. It may mot be leaking on the "inside" where you will be taping it.

That being the case, teflon tape should be fine. There is a "pink" tape that handles a higher heat and more chemicals than the generic stuff.
I'm assuming it's the wire-type since the threads of it are unwinding and looks like a slinky.

Thanks for the info guys.
kenzo42 is offline   Reply With Quote
Old 08-18-2008, 09:48 PM   #5
Senior Member
 
Join Date: Nov 2005
Location: Austin, TX yall
Posts: 849
Total Cats: 0
Default

Don't JB Weld anything you would possibly want to remove later.

Chris
Miatamaniac92 is offline   Reply With Quote
Old 08-18-2008, 09:57 PM   #6
Junior Member
iTrader: (1)
 
Join Date: May 2008
Location: NJ
Posts: 146
Total Cats: 0
Default

they also make a liquid teflon tape, if you can find that in the petroleum resistant flavor i'd try it before anything else.


and (brain 8-18-08) i'll add this because i'm told it's a common problem; if you use tape make sure you wrap it in the direction of the threads. if you don't it will more or less fight to come out as you put the bolt/plug in and won't seal as well.

Last edited by Braineack; 08-18-2008 at 10:09 PM. Reason: 'cause | clean up
ChairFaceChippendale is offline   Reply With Quote
Old 08-18-2008, 11:04 PM   #7
Elite Member
Thread Starter
iTrader: (6)
 
Join Date: Sep 2007
Location: CA
Posts: 1,990
Total Cats: 9
Default

Quote:
Originally Posted by Miatamaniac92 View Post
Don't JB Weld anything you would possibly want to remove later.

Chris
From what I understand about JBweld is that it will just chip off eventually. Or you can just use a torch.
kenzo42 is offline   Reply With Quote
Old 08-19-2008, 02:03 AM   #8
Senior Member
 
Join Date: Nov 2005
Location: Austin, TX yall
Posts: 849
Total Cats: 0
Default

Quote:
Originally Posted by kenzo42 View Post
From what I understand about JBweld is that it will just chip off eventually. Or you can just use a torch.
If you want to go through that much trouble to take off a fill plug have at it.

There's plenty of ghetto ways to fix any given problem. I've never had to deal with a helicoil (knocks on wood). I'm just letting you know you might run into problems if you use JB weld.

Chris
Miatamaniac92 is offline   Reply With Quote
Old 08-22-2008, 03:59 AM   #9
Elite Member
Thread Starter
iTrader: (6)
 
Join Date: Sep 2007
Location: CA
Posts: 1,990
Total Cats: 9
Default

After reading up on some things, I've changed my mind. Forget the teflon.

For a stripped differential fill hole, is it better to use:

1) Permatex Thread Sealer
or
2) Permatex Threadlocker Red



kenzo42 is offline   Reply With Quote
Old 08-22-2008, 10:53 AM   #10
Elite Member
iTrader: (21)
 
Join Date: Jun 2007
Location: Rochester, NY
Posts: 5,684
Total Cats: 555
Default

Threadlocker is to hold in a bolt to prevent loosening. Thread sealer is to prevent leaks, but is intended for intact threads.

If your threads are fooked, you can try the sealer, but if it's stripped, it still may not hold. Have it drilled and tapped out for an insert (helicoil is a brand, there are others), or make an adapter; i.e. the hole is drilled and tapped for a larger thread, the insert/adapter is put in with threadlocker (or JB Weld), and the plug is put in the insert/adapter with sealant.
rleete is offline   Reply With Quote
Old 08-22-2008, 11:02 AM   #11
AFM Crusader
iTrader: (18)
 
olderguy's Avatar
 
Join Date: Oct 2004
Location: Wayne, NJ
Posts: 4,438
Total Cats: 84
Default

You could tap it out for the next larger NPT size and put in a normal pipe plug as in your transmission.
olderguy is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 57 07-19-2017 05:11 PM
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 04:00 PM
Expected intake temps on the track? tazswing Race Prep 20 10-03-2015 12:04 PM
WTB Bellhousing Bolts patsmx5 WTB 1 10-01-2015 10:43 AM


Thread Tools

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 06:16 PM.