| I am an idiot......... [message #237649] |
Mon, 27 January 2014 15:17  |
Otterwan
Messages: 946
Registered: July 2013
Location: Lynnwood (north of Seattl...
Karma: 0
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A while back I replaced the temperature sender, after which the gauge seemed erratic until the engine was thoroughly warmed up. Today while working on something else I noticed something white where the sender threads into the intake manifold. Teflon tape. Without even thinking that the manifold was the ground for the sender I had carefully wrapped the threads in Teflon tape before I installed it.
I removed the sender, cleaned the tape off the threads, and reinstalled it. Gauge works great now.
1977 Birchaven, Lynnwood WA - "We may not be able to stop all evil in the world, but I know that how we treat one another is entirely up to us."
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| Re: I am an idiot......... [message #237656 is a reply to message #237649] |
Mon, 27 January 2014 16:12  |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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| Otterwan wrote on Mon, 27 January 2014 16:17 |
A while back I replaced the temperature sender, after which the gauge seemed erratic until the engine was thoroughly warmed up. Today while working on something else I noticed something white where the sender threads into the intake manifold. Teflon tape. Without even thinking that the manifold was the ground for the sender I had carefully wrapped the threads in Teflon tape before I installed it.
I removed the sender, cleaned the tape off the threads, and reinstalled it. Gauge works great now.
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Dave,
Not by any stretch..
I've used teflon tape lots of places that a ground needed to be made, and if one side is steel or iron, it has always worked. The one that will get you is a brass, bronze or aluminum joint. They just aren't always ragged enough to tear the tape and make good contact. Oil pressure senders and switches are another gotcha....
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] I am an idiot......... [message #237657 is a reply to message #237649] |
Mon, 27 January 2014 16:12 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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Which begs the question - what is the proper thread sealant / lubricant to use where coolant is concerned and electrical conductivity is needed?
Larry Davick
Fremont, California
A Mystery Machine
'76 (ish) Palm Beach
----- Original Message -----
From: "David Orders" <dao@oarsllc.com>
To: gmclist@temp.gmcnet.org
Sent: Monday, January 27, 2014 1:17:08 PM
Subject: [GMCnet] I am an idiot.........
A while back I replaced the temperature sender, after which the gauge seemed erratic until the engine was thoroughly warmed up. Today while working on something else I noticed something white where the sender threads into the intake manifold. Teflon tape. Without even thinking that the manifold was the ground for the sender I had carefully wrapped the threads in Teflon tape before I installed it.
I removed the sender, cleaned the tape off the threads, and reinstalled it. Gauge works great now.
--
1976 Royale "Twinkie II", 1978 Palm Beach with front end fire. Lynnwood WA - "We may not be able to stop all evil in the world, but I know that how we treat one another is entirely up to us."
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] I am an idiot......... [message #237659 is a reply to message #237656] |
Mon, 27 January 2014 16:50 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Matt,
I reckon it also depends on where you start wrapping the tape and how many wraps you put around the item.
I always start at least 1 thread up and wrap no more than 2 wraps.
Regards,
Rob M.
-----Original Message-----
From: Matt Colie
Dave,
Not by any stretch..
I've used teflon tape lots of places that a ground needed to be made, and if one side is steel or iron, it has always worked. The
one that will get you is a brass, bronze or aluminum joint. They just aren't always ragged enough to tear the tape and make good
contact. Oil pressure senders and switches are another gotcha....
Matt
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] I am an idiot......... [message #237661 is a reply to message #237657] |
Mon, 27 January 2014 17:26 |
Otterwan
Messages: 946
Registered: July 2013
Location: Lynnwood (north of Seattl...
Karma: 0
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| ljdavick wrote on Mon, 27 January 2014 14:12 |
Which begs the question - what is the proper thread sealant / lubricant to use where coolant is concerned and electrical conductivity is needed?
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According to instructions for the Equus sensor I just installed, nothing. And so far it isn't leaking.
1977 Birchaven, Lynnwood WA - "We may not be able to stop all evil in the world, but I know that how we treat one another is entirely up to us."
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| Re: I am an idiot......... [message #237693 is a reply to message #237649] |
Mon, 27 January 2014 18:50 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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How about in the old days of silent mercury switches. Having them hang out of the box for testing gave unpredictable outcomes.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] I am an idiot......... [message #237918 is a reply to message #237657] |
Wed, 29 January 2014 08:02 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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It's probabl;y heresy, but I use the same stuff I use on sparkplugs. Conductive non-stick. The guages work.
--johnny
________________________________
From: Larry Davick <ljdavick@comcast.net>
To: gmclist@temp.gmcnet.org
Sent: Monday, January 27, 2014 5:12 PM
Subject: Re: [GMCnet] I am an idiot.........
Which begs the question - what is the proper thread sealant / lubricant to use where coolant is concerned and electrical conductivity is needed?
Larry Davick
Fremont, California
A Mystery Machine
'76 (ish) Palm Beach
----- Original Message -----
From: "David Orders" <dao@oarsllc.com>
To: gmclist@temp.gmcnet.org
Sent: Monday, January 27, 2014 1:17:08 PM
Subject: [GMCnet] I am an idiot.........
A while back I replaced the temperature sender, after which the gauge seemed erratic until the engine was thoroughly warmed up. Today while working on something else I noticed something white where the sender threads into the intake manifold. Teflon tape. Without even thinking that the manifold was the ground for the sender I had carefully wrapped the threads in Teflon tape before I installed it.
I removed the sender, cleaned the tape off the threads, and reinstalled it. Gauge works great now.
--
1976 Royale "Twinkie II", 1978 Palm Beach with front end fire. Lynnwood WA - "We may not be able to stop all evil in the world, but I know that how we treat one another is entirely up to us."
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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