Attaching Heatsinks to Hoods

Enigma · #1 09-08-2012, 01:35 AM

Can I use something like JB weld to attach an aluminum heatsink to a plastic hood?

I don't want to drill holes in the hood.

gregzz4 · #2 09-08-2012, 01:40 AM

Can you get us some pics of the sink, and where you'd like to attach it ?

I'd be a little concerned about it holding longterm as heat can separate adhesives

Enigma · #3 09-08-2012, 01:45 AM

I'm working on photos . . . Photobucket isn't cooperating.

Enigma · #4 09-08-2012, 01:50 AM

Not totally done yet . . .

The CF lighting and the reflector are coming out. The LEDs will be mounted under the acrylic slash guard.

Could I drill holes in the splash guard and attach the heatsink to that with screws? I'd need some sort of tubing to go between the splash guard and the heat sink for the screws to run though: to keep the heatsink at a set distance from the slash guard.

Hmmm. Guess I should have drilled holes in the heat sink before I glued any of the LEDs down.

Enigma · #5 09-08-2012, 01:53 AM

Crappy Tire has a "high heat" JB Weld.

http://www.canadiantire.ca/AST/brows....jsp?locale=en

Enigma · #6 09-08-2012, 01:54 AM

There's an automotive "Goop" too.

http://www.canadiantire.ca/AST/brows....jsp?locale=en

How hot can I expect the heatsink to get?

Snaz · #7 09-08-2012, 02:08 AM

I mounted my heatsink by building a bracket with one end screwed into an existing plastic stanchon and the other end over the heatsink. Two of these hold the HS in place without drilling.

Ross · #8 09-08-2012, 02:54 AM

Since you are using the existing splash guard for the leds, perhaps you can utilize it to mount to rather than the external cover.

Id expect a decent amount of heat on that sink. Im running 16 boards at 65% on the same size sink and with a 25cfm fan I sit at 87f.

The Grizz · #9 09-08-2012, 03:05 AM

I did Claymax's led retro fit and all we did was to first gut the hood of all the PC crap set in the heatsink and put the splash gaurd back on. Use the original hole for power & that was that.

Enigma · #10 09-09-2012, 12:53 AM

I know what I'm going to do.

I'm going to use Automotive JB Weld, bar stock aluminum, and screws.

If you look above and below the heatsink in the photo, you'll see holes for a total of six screws: two top left, one top right, two bottom left, and one bottom right.

I'm going to attach four pieces of bar stock aluminum to the heat sink using JB Weld. I'm going to drill holes in the bar stock that align with the screw holes. Then I'm going to use screws to mount it to the holes.

I really don't want to drill the heatsink, as that will affect the placement of additional LEDs in the future (and I'm not so good with a drill).

I'm waiting for more stuff from Martin, so the LEDs aren't done yet. I wonder how many orders it takes to get everything one requires? I keep finding more things that I need/forgot. I'm sure three will be the charm.

Will any hardware store carry the bar stock? What is it normally used for (so I know what department to find it in)?

Edit: in tearing the hood apart I sure learned one thing . . . JBJ's quality control and manufacturing standards are abysmal!