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How To: Repair Your Leaky Coolant Hardline. ***PICS***

  • Thread starter Thread starter 94GTCoupe
  • Start date Start date Feb 25, 2013

94GTCoupe

10 Year Member
May 7, 2006
1,412
92
79
CA
Feb 25, 2013
#1
  • Feb 25, 2013
  • #1
Tools Needed.

A vice.
Hammer or mallet.
Tapered spindle (or something similar).
Pick.

Supplies needed.

2- O Rings
(size 1/2 ID - 5/8 OD - 1/16 W. Can be found here www.theoringstore.com/index.php?main_page=product_info&cPath=367_23_22&products_id=1111 )

Silicone Grease.
A Scotch Brite pad.

First a before pic of the problem.
These tend to leak when removed for an intake manifold swap or even looking at it wrong.
Over time, the heat destroys the 2 o rings under the rotating fitting.


Lets get started, I'll be showing the steps with the hardline already removed from the car.

1-Coolant Hardline.


2-To remove the fitting, the flare will need to be knocked down to slip the fitting over and off.


3-place the flared portion into the vice. Gently tighten the vice to collapse the flare, do this all the way around the flare.
This will collapse the flare just enough to slip the fitting over.
DO NOT use too much pressure, the hardline will crack.


4-you can now slip the fitting over and off.




5- with you pick, remove the old o rings (if present) and clean the hardline and fitting with the Scotch Brite pad.




6-set up in vice.


7-lube up o rings and slip onto hardline.


8-lube up a little more, and slip fitting over.


9-with the tapered spindle (or similar) gently reflare the hardline.
You want just enough to flare out the end.
Be careful, the hardline can easily crack, I cracked an explorer line I practiced on earlier.


And there you go!
Heres a picture of a line I repaired previously.
No leaks and has over 500 miles on it.
 
Reactions: 94tang, lizzard, jrichker and 2 others

ratio411

Founding Member
Apr 21, 2002
3,870
73
109
Pensacola FL
Feb 25, 2013
#2
  • Feb 25, 2013
  • #2
It works!
Nobody is repopping the SN tubes anytime soon.
 
Reactions: nicksride and Eric90GT
E

Eric90GT

Member
Aug 12, 2002
34
0
6
Salem, NH
Feb 26, 2013
#3
  • Feb 26, 2013
  • #3
Thank you, you just saved me $60 over buying a used one which who even knows if it would have the same problem.
 

94GTCoupe

10 Year Member
May 7, 2006
1,412
92
79
CA
Feb 26, 2013
#4
  • Feb 26, 2013
  • #4
No problem, glad we could help!
 

ratio411

Founding Member
Apr 21, 2002
3,870
73
109
Pensacola FL
Feb 26, 2013
#5
  • Feb 26, 2013
  • #5
This should be 'sticky'...
 

ratio411

Founding Member
Apr 21, 2002
3,870
73
109
Pensacola FL
Feb 26, 2013
#6
  • Feb 26, 2013
  • #6
Eric90GT said:
...something to reflare the end.
Click to expand...
I used a larger punch, don't know the technical name, but it got fatter gradually towards the top, and was fat enough at the tip that it didn't bottom out in the tube. I hammered it in, expanding the end just enough to hold the fitting. I had the fitting pushed all the way up as high as it would go, so it didn't inhibit the expansion. That's about the best I can offer for advice.

I think the best advice for taking the fitting off initially is to only reduce the flare just enough to force the fitting off. Too much and I think you are asking for problems.
 

SableSal

Member
Sep 17, 2009
295
3
19
Fresno, Californ-I-A
Feb 27, 2013
#7
  • Feb 27, 2013
  • #7
Haha, you cursed yourself starring at that line. Glad you got it fixed!
 

95BlackTan50

Member
Oct 28, 2004
116
0
16
Mar 11, 2017
#8
  • Mar 11, 2017
  • #8
Thanks to davis3. Other than the normal pain in the ass things that get in the way, these instructions were awesome.
 

Dan_Soprano

15 Year Member
May 7, 2003
7,410
54
129
Jacksonville, FL
Mar 11, 2017
#9
  • Mar 11, 2017
  • #9
Good read. Made sticky.
 
Reactions: davis3
M

Marksn95

New Member
Aug 8, 2017
7
0
1
Aug 8, 2017
#10
  • Aug 8, 2017
  • #10
Can u tell me what this part is ?? Its connected to a pipe line
 

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94tang

20+ Year Stangneter
Aug 24, 2003
297
4
19
East TN
Aug 17, 2018
#11
  • Aug 17, 2018
  • #11
This is INVALUABLE information....
 

7991LXnSHO

wanna catch the space herp
10 Year Member
Sep 1, 2010
7,387
2,745
194
Kearney, NE
Aug 25, 2020
#12
  • Aug 25, 2020
  • #12
Is this applicable to the 87-93 Mustang tubes?
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,949
10,587
203
polk county florida
Aug 25, 2020
#13
  • Aug 25, 2020
  • #13
Yes
 

LX-Markham

Founding Member
Apr 17, 2002
816
0
16
Markham, Ontario
Aug 28, 2022
#14
  • Aug 28, 2022
  • #14
Sorry about bumping an old thread, but this was exactly what I needed! 94GTcoupe, if you are still around, thanks!

wow, it’s been so long since I’ve been on stangnet that my old avatar of when I had my old notch is still on here.
ironically, the eddy performer lower intake I installed on my ‘94 (which caused this issue to arise) was originally bought to go onto my ‘90.
 
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