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| What is the name of this cooling line? (Page 1/2) |
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Mct2green
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AUG 24, 09:59 AM
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I have a small pinhole leak in a cooling line that is right under the air intake. It is directly over one of the clutch cables. The metal pipe runs from behind the engine, under the intake and into the engine near the thermostat. I do not know what this line is called to purchase a new one. Is there a fix for small holes? JB weld or something like that?
 [This message has been edited by Mct2green (edited 08-24-2019).]
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Blacktree
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AUG 24, 10:05 AM
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The photo doesn't work, but I'm assuming you have a V6. If that's true, then the coolant pipe you're talking about is commonly called the coolant crossover tube.
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Mct2green
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AUG 24, 11:11 AM
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I am using Pencocks image poster. It seems to just post the link when I click on image and put in the path like this: [URL=http://images.fieroforum.com/2017]. any ideas?
This metal pipe runs out of the top rear of the engine and is connected to another pipe from the TPS area with a bracket. It goes across the top of the motor and into the engine near the oil sender. Is that the coolant crossover tube? Looks like the photos and info online show those being larger pipes that come up from the bottom of the car???[This message has been edited by Mct2green (edited 08-24-2019).]
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Gall757
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AUG 24, 11:50 AM
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There are 2 coolant lines that go to the throttle body on a stock Fiero....many have been removed over the years, especially in the south. [This message has been edited by Gall757 (edited 08-24-2019).]
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Mct2green
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AUG 24, 11:57 AM
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Right. What are those called? Any thoughts on patching a pinhole? I want to find the part to order a new set but don’t know what to search for.
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wftb
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AUG 24, 12:06 PM
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I do not know what they are called but unless someone like Rodney Dickman or the Fiero Store sells them you are not going to find new ones.GM makes almost no spare parts for Fieros. I would just block them off, not needed where you live anyway. They are not so much a cooling line but really a warming line to keep intake temps up in the winter time. [This message has been edited by wftb (edited 08-24-2019).]
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Blacktree
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AUG 24, 01:01 PM
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OK, that's not the coolant crossover tube. Those are the throttle body heater lines. I'm not sure if anyone makes a replacement for that. People usually just delete them. Considering where you live, that shouldn't be an issue.
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pmbrunelle
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AUG 24, 01:36 PM
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Usually small holes like that can be soldered shut.
Firstly, you need to take the line off the car, then grind off any rust.
If the hole is small, you can try simply applying flux to the area, heating with a propane torch, and then flowing plumber's solder onto the hot steel.
If the hole is larger, you can use a penny (with a curve bent into it) as a patch panel, then flux and solder.
Once soldering is complete, remove flux residue with isopropyl alcohol. Then, sand + paint the line to prevent further corrosion.[This message has been edited by pmbrunelle (edited 08-24-2019).]
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theogre
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AUG 24, 03:13 PM
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| quote | Originally posted by pmbrunelle:
Usually small holes like that can be soldered shut.
Firstly, you need to take the line off the car, then grind off any rust.
If the hole is small, you can try simply applying flux to the area, heating with a propane torch, and then flowing plumber's solder onto the hot steel.
If the hole is larger, you can use a penny (with a curve bent into it) as a patch panel, then flux and solder.
Once soldering is complete, remove flux residue with isopropyl alcohol. Then, sand + paint the line to prevent further corrosion. |
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US pennies are copper platted Zinc for Decades and won't work here.
Pure Copper as a patch in steel can fail too. Now or soon as gets heat cycling etc.
Worse if you have 1 hole leaking now... Must check the whole part because likely have more thin areas waiting to fail and often soon.
And when filled make sure the System see 50/50 mix.
Many put 50/50 premix after flushing and system has enough water then the premix is weak and rot parts inside out.
See my Cave, Coolant Fill------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)
The Ogre's Fiero Cave
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pmbrunelle
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AUG 24, 03:43 PM
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Cooling system is under 16 psi of pressure; the patch does not have to be made from a high-strength material to resist the stress.
When you have the part out for repair, looking over the entire tubing assembly for other rust spots is only common sense.
On my Fiero, I did a TB coolant line delete. In doing so, I patched the thermostat housing with a copper-clad Canadian penny.
It held up fine over about 7 years of operation, and I'm about to put it back into service after a 3-year powertrain overhaul.
If you check the middle of the photo, you can see where the thermostat housing is embossed; that's where the penny patch is.
I like pennies, since the copper wets easily (once wirebrushed clean) with solder. But mild steel sheet would work too.[This message has been edited by pmbrunelle (edited 08-24-2019).]
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