Compression fitting spliced Trans Cooler Line

[NYDeer]

I ordered replacement trans cooler lines, and picked the wrong ones. I didn't know I had the optional trans cooler.
Anyway, I needed the truck sealed up, didn't want to risk trans damage. I had the mechanic cut about 3-4" off the lower radiator trans line, and fab out a replacement end, joined with a compression union to the factory original line. Work looks good, I am satisfied.

Anyone have any experience with a similar repair failing? Would you replace the line anyway?

I have a grocery list going 'to do' repairs and want to know if this box can be checked complete, or needs a revisit.
Thanks for your experiences & comments.

 

[GoToGuy]

Couldn't do a 45 ° flared fittings or the inverted flare that's all ready used? I'm just a big fan of compression steel on steel.

 

[Schurkey]

A double-flare on the tubing, with an inverted-flare union is the better way. Normal brass compression unions* are outright illegal on fuel supply plumbing--which is why every manufacturer was using double-flared tubing, and inverted flares on the connection fitting.

HOWEVER, I've used brass-ferrule compression unions on trans cooler tubes many times. They'll work just fine as long as the ferrules aren't over-crimped or under-crimped. Compression unions are often used on domestic water supplies--sinks and toilets, for example. Static pressure is typically 60--70 psi, but the spikes can be much higher. Temperature on the water supplies isn't as high as on automotive applications, but that doesn't seem to be a problem.



*We put together the steel-tubing plumbing for CNG fuel systems using Swagelok compression fittings. 1000 psi, and those Swagelok compression fittings would seal gas-tight, could be taken apart and put back together reliably. Expensive as all get-out, but they worked FABULOUSLY.
www.swagelok.com/en

High-Quality Fluid System Solutions & Components

Swagelok is a privately held manufacturer of fluid system solutions including components, assemblies, and services trusted in critical industries worldwide

www.swagelok.com

 

[someotherguy]

A double-flare on the tubing, with an inverted-flare union is the better way. Normal brass compression unions* are outright illegal on fuel supply plumbing--which is why every manufacturer was using double-flared tubing, and inverted flares on the connection fitting.

HOWEVER, I've used brass-ferrule compression unions on trans cooler tubes many times. They'll work just fine as long as the ferrules aren't over-crimped or under-crimped. Compression unions are often used on domestic water supplies--sinks and toilets, for example. Static pressure is typically 60--70 psi, but the spikes can be much higher. Temperature on the water supplies isn't as high as on automotive applications, but that doesn't seem to be a problem.



*We put together the steel-tubing plumbing for CNG fuel systems using Swagelok compression fittings. 1000 psi, and those Swagelok compression fittings would seal gas-tight, could be taken apart and put back together reliably. Expensive as all get-out, but they worked FABULOUSLY.
www.swagelok.com/en

High-Quality Fluid System Solutions & Components

Swagelok is a privately held manufacturer of fluid system solutions including components, assemblies, and services trusted in critical industries worldwide

www.swagelok.com

They make nifty bleeder valves, too. Replaced the allen bolt bleeder on my 6.1 hemi with a Swagelok piece.

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Richard

 

[NYDeer]

Ok. Thanks for the insights. I didn't watch them or see the brass union pieces they were using before they did the work. When i get back to the truck, I'll take a look again at them, see if I can tell if it is a 45 degree flare or ferrule flare.

 

[AuroraGirl]

They make nifty bleeder valves, too. Replaced the allen bolt bleeder on my 6.1 hemi with a Swagelok piece.

You must be registered for see images attach

Richard

nice