 Oil Pressure Sender Install, Thread Sealant? |
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| kconway |
  Sep 25 2009, 12:26 AM
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#1
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Senior Member  Group: Members Posts: 1,347 Joined: 6-December 04 From: Monrovia, CA Member No.: 3,231 Region Association: Southern California  |
I need to put in a new oil pressure sender, I though I remember that it wouldn't work properly if you used teflon tape on the threads. Is this true? Do you install this dry?
Kev |
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| URY914 |
Sep 25 2009, 07:24 AM
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#2
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I built the lightest 914 in the history of mankind. Group: Members Posts: 121,070 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
Tapered threads, no sealent needed.
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| Bartlett 914 |
Sep 25 2009, 08:16 AM
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#3
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Advanced Member Group: Members Posts: 2,216 Joined: 30-August 05 From: South Elgin IL Member No.: 4,707 Region Association: Upper MidWest |
QUOTE(URY914 @ Sep 25 2009, 08:24 AM)  Tapered threads, no sealent needed. The general consensus here seems to be not to use tape (or lubricant) I really don't understand why not. Tape is not a sealant. It is to prevent the threads from galling allowing it to tighten tighter. Why is this any different from tapered threads in plumbing? There you will use a Teflon tape or pipe dope of some kind. All of these are thread lubricants. |
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| 76-914 |
Sep 25 2009, 04:34 PM
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#4
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,509 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California 
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QUOTE(Bartlett 914 @ Sep 25 2009, 07:16 AM) QUOTE(URY914 @ Sep 25 2009, 08:24 AM) Tapered threads, no sealent needed. The general consensus here seems to be not to use tape (or lubricant) I really don't understand why not. Tape is not a sealant. It is to prevent the threads from galling allowing it to tighten tighter. Why is this any different from tapered threads in plumbing? There you will use a Teflon tape or pipe dope of some kind. All of these are thread lubricants. Mark is 100% correct. It's a lubricant. So is a bar of soap. Get your mind out of the gutter! As Mark mentioned; pipe threads are tapered. (Know the ratio? It's 1" per 12ft.) The dope, tape or any other lubricant just allows the tapered threads to perform their original function with less resistance. Teflon differs from other types of lubs in that it can be used as a sealant. When there is a leak at a tapered thread joint, it is a funtion of the threads; not the pipe dope. Pipe dope will not seal "shit". However, with enough teflon tape applied, threaded diameters can be increased in size. This is where Teflon tape gets a bum rap. Anything, I repeat anything is dangerous in the hands of the ignorant. Notice I didn't say idiot. There are specific tapes designed for certain jobs and they are color coded. Pink is for gas. Also, the good stuff is thick. Not like that cheap stuff you find in hardware stores. And because it is gauged you know to use no more than 3 1/2 wraps! Do you know where to begin wrapping? At the starting threads. And don't put it on backwards. Yes, it matters. Clockwise, the same direction as the threads. Do it the other way and......."Oh my gosh. What happened to the tape. It came off!" As far as heat being a problem; I literally solder and braze (700F-1100F) within 1-2 inches of teflon tape threaded joints (and have done so for 30 yr's) with no resulting leaks. (remember the tape has already completed it's job at this point.) I wouldn't hesitate to used it any auto application; or Permatex A/C sealant or a bar of soap or a drop of oil (except on PVC, oil or petroleum based pipe dopes will soften PVC) Life is like a box of chocolates. Thats about all I have to say. |
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Posts in this topic
kconway Oil Pressure Sender Install Sep 25 2009, 12:26 AM
markb Install it dry. Sep 25 2009, 12:42 AM Gint :agree: Sep 25 2009, 07:13 AM Vacca Rabite I put case sealant on it just like all the other p... Sep 25 2009, 08:31 AM
Bartlett 914
I put case sealant on it just like all the other ... Sep 25 2009, 08:50 AM markb I believe the sender needs to ground to the case t... Sep 25 2009, 09:00 AM hcdmueller :agree:
The sender has to ground to the case. I... Sep 25 2009, 09:14 AM DBCooper The sender needs to ground, so both sealant and ta... Sep 25 2009, 09:18 AM 9146986 I use a small amount of permatex aircraft sealant.... Sep 25 2009, 01:52 PM r_towle when using a remote setup for a guage/idiot light.... Sep 25 2009, 02:47 PM Al Meredith I believe in every rebuild kit there is a crush ca... Sep 25 2009, 07:27 PM Vacca Rabite Mine worked with case sealant. I am using a paint... Sep 25 2009, 10:51 PM underthetire I used a grease gun hose. Someone (maybe Krusty ) ... Sep 26 2009, 12:52 AM |
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