Hole in Braided A/C Line - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 07-12-2008, 10:23 PM
Member
 
Join Date: Jan 2003
Location: Newman, ca
Posts: 35
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Hole in Braided A/C Line

Recently got my Model A registered and after several short trips I decided to get the a/c charged by my son. When he did a leak test you could hear the nitrogen coming out. Turned out to be a small hole in the Braided A/C line that was running from the Condenser along the frame to the dryer. The only thing it could touch was the fuel pump. My buddy who is in the Radiator business said he sees lots of damage to radiators due to no or poor grounds. I am now adding grounds from the engine to frame, Body to engine, and will connect the Battery negative which is currently grounded to the frame (Batt in trunk) to the engine at the starter. Hopefully this will be enough...Has anyone else seen this happen?.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 07-13-2008, 07:22 AM
Irelands child's Avatar
Registered User
 
Last wiki edit: Ford engine specifications Last photo:
Join Date: Jan 2005
Location: Upstate New York
Posts: 4,905
Wiki Edits: 8

Thanks: 13
Thanked 202 Times in 183 Posts
Unless I'm missing something, I can't see any reason for damage to a radiator because of a poor ground - that is - unless you have an electric fan. And even that - many (most) electric fans are electrically isolated from the radiator by a plastic shroud. The 2 rad mounting bolts and the 2 top locating rods should do a pretty good job of grounding and whatever grill shell you have will also be grounded to the radiator. What more can you ask for??

Grounds should always be initially at some engine bolt and should be the same gauge wire as the positive cable. In my case, also an 'A' with the battery in the trunk, I have 1ga wire for both cables and its about 10 feet long. I also have a secondary ground to the frame and a third to the body (a steel Brookville).

Dave W
__________________
Irelands child
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 07-13-2008, 08:24 AM
Member
 
Last photo:
Join Date: Jan 2003
Location: tennessee
Posts: 5,912
Wiki Edits: 0

Thanks: 0
Thanked 7 Times in 7 Posts
Poor chassis ground will indeed cause radiator damage, strange as it may seem. I am not sure if it is conductivity though the water or wire inside the hoses but if there is bad grounding from the engine to the chassis part of the current will flow through the radiator. I have even seen it dissolve holes in those cheapy chrome thermostat housings and I know of one case where that happened twice to the same guy. When the T-stat housing started leaking through a tiny hole we removed it and found it had corroded away badly inside and I told him he needed to check the ground cables but he insisted it was just a poor quality housing. About a year later when the new one did the same thing we checked the ground straps and found he had none hooked up and I don't know what the darn thing was grounding through, after hooking up the proper ground straps he later told me he noticed his lights no longer got dim when he turned on the heater. Also it has been over a year since and there still are no leaks in his new T-stat housing!
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 07-13-2008, 08:43 AM
302 Z28's Avatar  
Last photo:
Join Date: May 2003
Location: North Texas
Posts: 10,837
Wiki Edits: 0

Thanks: 1
Thanked 86 Times in 73 Posts
It's a fact people, it's called galvanic corrosion.

Vince
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 07-13-2008, 08:46 AM
Irelands child's Avatar
Registered User
 
Last wiki edit: Ford engine specifications Last photo:
Join Date: Jan 2005
Location: Upstate New York
Posts: 4,905
Wiki Edits: 8

Thanks: 13
Thanked 202 Times in 183 Posts
Thermostat housings aren't the best example for a 'corrosion' failure. I have had and have seen many 'way back when' of the pot metal (zinc) and aluminum versions fail, and not always on performance cars. This is usually caused by the pH of the coolant being too far off of neutral, attacking either metal. Usually someone has left their antifreeze in the radiator too long or the fill water is 'off'. In my 'rust belt' part of the country radiators get attacked externally by road salt - and usually the aluminum versions - and another case of pH 'off' on the water that sprays from the road. I wont discuss 2 Subaru's we had in the '80s, but they got expensive

Poor grounds for sure can cause lights to dip, heaters to slow and in electronic cars, poor performance.

Dave W
__________________
Irelands child
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 07-13-2008, 11:17 AM
Member
 
Join Date: Jan 2003
Location: Newman, ca
Posts: 35
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the responses. My Radiator shop buddy says hook up a Voltmeter, Negative to a ground and suspend the Positive probe in the coolant (not touching metal). You will see about 1 volt in an ungrounded situation.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 07-13-2008, 11:39 AM
Member
 
Last photo:
Join Date: Jan 2003
Location: tennessee
Posts: 5,912
Wiki Edits: 0

Thanks: 0
Thanked 7 Times in 7 Posts
Quote:
Originally Posted by 30 sportcoupe
hook up a Voltmeter, Negative to a ground and suspend the Positive probe in the coolant (not touching metal). You will see about 1 volt in an ungrounded situation.

1 volt is enough to cause corrosion and it may be possible that the antifreeze solution works somewhat like the electrolyte solution in a plating tank, whether it does or not I have no idea. I have to agree that any caustic substance would attack that potmetal housing but antifeeze is supposed to inhibit corrosion unless it is old so there are a lot of ifs here. Bad grounding is commonly believed to be one cause of radiator demise but I guess common belief is not proof of fact and many commonly accepted "facts" in reality are not. First chance I get I am going to unhook the ground wires on something and try that little voltage test and if there is voltage present, and I think there is the real possibility there will be, that will be the smoking gun!
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
how to cut braided fuel line? Longboard Hotrodding Basics 22 05-23-2014 08:20 PM
2001 GMC Jimmy 4.3 > WHERE DOES THIS VACUUM LINE GO ??? FFredericks Engine 8 10-28-2007 08:56 AM
fuel question beach_boy327 Engine 5 10-17-2007 07:34 PM
A/C line crimping tool recommendation. brian0605 Garage - Tools 3 06-19-2007 08:22 AM
Body Line Man586 Body - Exterior 6 08-20-2004 08:24 AM


All times are GMT -6. The time now is 05:24 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.