How close can brake hardline get to the exhaust

[dremu]

...before it cooks the brake fluid?

I'm doing an axle swap and the hard line runs over the axle, which puts it kinda close to the exhaust, less than 6" at rest.

I'm thinking I may need to reroute the hardline, which will suck. It is, at least, the hardline with the spiral wrapper over it, which I presume will assist in insulating and dissipating heat.

Any thoughts, experience, other?

-- A

 

[Stomis]

Wrap the exhaust there. Should keep the radiant heat in in that location. By the time you're that far back anyway its really not so cookin hot.

 

[rebelgregory]

Got me thinking since I just swapped axles and ran hardline over the axle, but not close to exhaust. I got to looking at wikipedia and it says the boiling point for dry (no water) DOT 3 is 401 F and starts going down as water content increases.

I know at idle, my exhaust outlet temps are nowhere near 401. And while running, I would think the airflow would provide sufficient convection cooling to the brake lines to be sure it would never get that hot.

If it was mine and I had a hard line 4" or so away from an exhaust line, that should be plenty sufficient. If the exhaust is dumping straight on the brake lines at point blank range, maybe not good, but I don't think you'd need a ton of clearance. Plenty of cars these days run exhaust down the frames next to brake lines within 6" without problem.

Pic of your setup may help, but I think you're ok.

 

[dremu]

This is on the sixpack, so especially on that truck the exhaust is cooled some by the time it's back that far. Next time I'm under there I'll see how close it is; worst case I may be able to adjust down it some as the bracket on the pumpkin could be changed around. The wrap might give me some peace of mind too.

Thanks!

-- A

 

[mrk5]

I had my rear brake lines running along the backbone axle truss and to the calipers over the top of the springs. The exhaust exited on the driver side behind the axle. I would say the exhaust passed less than 6" from the brake line. Never noticed any trouble.