Nylon Safe for Cooler Lines?
TECH Fanatic
Joined: Jan 2015
Posts: 1,114
Likes: 33
From: Fort Worth, Texas
Not sure what temp nylon fuel hose is rated for?, Even then...It's not designed for the application.
Gates, Parker, & Dayco all make specific trans cooler hose, I use Stepless Ear Clamps to clamp cooler hoses, Worm clamps tears up the hose casing. Fuel injection hose clamps work though.
Gates, Parker, & Dayco all make specific trans cooler hose, I use Stepless Ear Clamps to clamp cooler hoses, Worm clamps tears up the hose casing. Fuel injection hose clamps work though.
TECH Junkie
Joined: Dec 2012
Posts: 3,614
Likes: 1,326
From: Iowa
gates 27058 5/16 cooler hose
made for transmission lines
any oreillys should carry a 25 foot roll and will sell it by the foot
rated to 400 psi
probably around the same price as that fuel line anyway
made for transmission lines
any oreillys should carry a 25 foot roll and will sell it by the foot
rated to 400 psi
probably around the same price as that fuel line anyway
Thread Starter
Teching In
Joined: Feb 2016
Posts: 20
Likes: 0
Not sure what temp nylon fuel hose is rated for?, Even then...It's not designed for the application.
Gates, Parker, & Dayco all make specific trans cooler hose, I use Stepless Ear Clamps to clamp cooler hoses, Worm clamps tears up the hose casing. Fuel injection hose clamps work though.
Gates, Parker, & Dayco all make specific trans cooler hose, I use Stepless Ear Clamps to clamp cooler hoses, Worm clamps tears up the hose casing. Fuel injection hose clamps work though.
My concern is ATF not reacting well with the nylon, I could see that ending poorly.
I already have -8 fittings on my cooler from another drivetrain and -6 to -8 adapters for a compression fitting on 5/16" tube, but that's alot of fittings. 5/16" to -8 aren't made.
And I have a ton of Dorman stuff left from my fuel system.
I am really space limited in the Volvo 240 tunnel and general engine bay. So I'm stuck using stock hard lines until I'm past the crank.
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Joined: Aug 2010
Posts: 7,323
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From: Ann Arbor, MI
I've been told that the cooling line pressure can reach 1/2 of the internal line pressure.
So 1/2 of 250psi is 125psi in the cooling lines which is double that of FI pressure.
(Correct me if I am wrong and you have measured the pressure.)
So 1/2 of 250psi is 125psi in the cooling lines which is double that of FI pressure.
(Correct me if I am wrong and you have measured the pressure.)
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Teching In
Joined: Feb 2016
Posts: 20
Likes: 0
You do know that 'line pressure', what the clutches and servos see off the pump, is NOT what the converter sees and DEFINITELY NOT what the cooler lines see, correct?
I contacted Dorman. The fittings are indeed rated for the pressure, temp, and ATF. They make a similar product for transmission quick disconnect fittings (like the stock fitting out of the housing) that use the same o-ring and locking mechanism, albeit with a brass rather than poly housing.
They do not however even have a temp rating for the fluid the nylon line can carry (just exterior temp), and have not tested it with ATF. Not so much a 'don't do this you will die', more of a 'this probably is not a long term solution'.
So, I'll have to bite the bullet and buy a 37deg flare tool or try some compression fittings.