Cox heat sink mod.

roddie Mon Aug 26, 2024 7:02 pm

I'd been wanting to try this for a while now.. and today I decided to see if I could do it. I took one of my Cox .049 heat sinks and drilled a .125" thru-hole parallel with the mounting-screw for inserting an aluminum tube for water-cooling marine applications.

Not sure if/how-well it will work yet... but I'm optimistic. Smile

robot797 Tue Aug 27, 2024 8:43 am

I would have drilled the hole on the other side
but hey it looks good

roddie Tue Aug 27, 2024 10:59 am

robot797 wrote:I would have drilled the hole on the other side
but hey it looks good

There isn't much "meat" on the other side Peter.. I thought about that too.. but didn't want to take the chance on ruining the part. I was actually lucky to get the hole on-center; all the way through. I used "peck-strokes" with my drill-press.

roddie Tue Aug 27, 2024 11:59 am

BETTER.. I re-drilled the outside bore to accept a #6-32 machine screw and swapped the tube to the inside bore. The original Cox machine screw was a #5-40.. so it can be used in a .049/.051 crankshaft some day. Smile

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