4L70E Cooler Line Size

[572Camaro]

BB,
Don’t change a thing!
3/8” diameter will work fine.
I didn’t ask Gordon about larger diameter.., my bad.
I chose 5/16” because:
1. Mark and Gordon both indicated it was big enough.
2. I got really tight clearance everywhere and I can get tighter bends in my tubing.
3. Frankly, it looks better..,


BRAG: we won most outstanding engine bay at Detroit Autorama a couple years back.

ADVICE: if you run “hard” engine mounts, and if you run hard lines, no need for a flex hose in between.

BOTTOM LINE: You are fine.., just shut the hood and drive it like you stole it!

[joeko23]

I used 3/8” nicopp hard lines with -6an fittings for TR6060. I also connected both hardline ends with a short flex line for ease of serviceability down the road. I’m pretty sure you can’t use the same flex line for fuel and oil. I went with Mr. Gasket push on style flex line. Their fittings are very affordable, no tools needed to install and don’t leak. Here’s a link to Holleys site, you can pick from the drop down menu fluid type and assembly method. It’s very useful.

https://www.holley.com/products/plum...ings_and_hose/

[Gmachine1911]

Originally Posted by joeko23

I used 3/8” nicopp hard lines with -6an fittings for TR6060. I also connected both hardline ends with a short flex line for ease of serviceability down the road. I’m pretty sure you can’t use the same flex line for fuel and oil. I went with Mr. Gasket push on style flex line. Their fittings are very affordable, no tools needed to install and don’t leak. Here’s a link to Holleys site, you can pick from the drop down menu fluid type and assembly method. It’s very useful.

https://www.holley.com/products/plum...ings_and_hose/

Excellent, thank you!

[Bad Bowtie]

Originally Posted by 572Camaro

BB,
Don’t change a thing!
3/8” diameter will work fine.
I didn’t ask Gordon about larger diameter.., my bad.
I chose 5/16” because:
1. Mark and Gordon both indicated it was big enough.
2. I got really tight clearance everywhere and I can get tighter bends in my tubing.
3. Frankly, it looks better..,


BRAG: we won most outstanding engine bay at Detroit Autorama a couple years back.

ADVICE: if you run “hard” engine mounts, and if you run hard lines, no need for a flex hose in between.

BOTTOM LINE: You are fine.., just shut the hood and drive it like you stole it!

My stainless lines were a little bit of a chore too. This is from when I got the project started last year. I then ran the tubing from the starter tucking next to the pan as GM did forward up near the radiator. I used PTFE braided lines for the connections. I'm thinking with the trans cooler having -6 AN I should be good
BB