 Relay Board repair 914, which compound to seal |
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| Medtner3 |
 Jun 2 2021, 07:39 PM
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#1
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Member  Group: Members Posts: 180 Joined: 7-July 20 From: Cedar Park Member No.: 24,467 Region Association: None  |
I have an exposed area of the relay board where a previous soldering was done. Should I use liquid electrical tape or potting compound to seal it? The existing potting compound does have some cracks and is dry and brittle. I think a quick fix of some liquid electrical tape would work but I want to make sure I can get whatever I use off in the event that I have future problems with the board and wish to restore it. Right now the board works but if I don't seal the copper traces I am sure that won't last.
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| Dave_Darling |
Jun 2 2021, 10:36 PM
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#2
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914 Idiot Group: Members Posts: 14,986 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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Use any electrical potting compound you like. I think just about any modern one will hold up to the conditions in the engine bay.
--DD |
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| 914Sixer |
Jun 3 2021, 06:20 AM
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#3
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914 Guru Group: Members Posts: 8,882 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region
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You need to clean ALL the tar off. You will be surprised what you will find.
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| bdstone914 |
Jun 3 2021, 07:04 AM
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#4
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bdstone914 Group: Members Posts: 4,522 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
QUOTE(914Sixer @ Jun 3 2021, 05:20 AM)  You need to clean ALL the tar off. You will be surprised what you will find. @Medtner3 Easy way to clean off the tar is put the board in boiling water. If you do it on a stove place the board in with tar sode up. Let it soak for a while use gloves and a chisel to scrap off the tar. Be carefull to not catch any of the traces. It is a 5 minute job. An old crock pot works well. |
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| 930cabman |
Jun 3 2021, 06:42 PM
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#5
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Advanced Member Group: Members Posts: 3,064 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States
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QUOTE(bdstone914 @ Jun 3 2021, 07:04 AM) QUOTE(914Sixer @ Jun 3 2021, 05:20 AM) You need to clean ALL the tar off. You will be surprised what you will find. @Medtner3 Easy way to clean off the tar is put the board in boiling water. If you do it on a stove place the board in with tar sode up. Let it soak for a while use gloves and a chisel to scrap off the tar. Be carefull to not catch any of the traces. It is a 5 minute job. An old crock pot works well. Thank you for the tip, I will following this method |
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| Medtner3 |
Jun 3 2021, 06:45 PM
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#6
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Member Group: Members Posts: 180 Joined: 7-July 20 From: Cedar Park Member No.: 24,467 Region Association: None |
QUOTE(bdstone914 @ Jun 3 2021, 08:04 AM) QUOTE(914Sixer @ Jun 3 2021, 05:20 AM) You need to clean ALL the tar off. You will be surprised what you will find. @Medtner3 Easy way to clean off the tar is put the board in boiling water. If you do it on a stove place the board in with tar sode up. Let it soak for a while use gloves and a chisel to scrap off the tar. Be carefull to not catch any of the traces. It is a 5 minute job. An old crock pot works well. Thanks Bruce great tip I guess the consensus is go ahead and strip it all off not just patch a little bit and fix it for the next fifty years I was leaning that direction |
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