Trick for Passing Cooling Lines through Bulkheads

Take +/- 2" length of heat shrink tubing of the smallest diameter that will telescope over the cooling line, slip it about 3/16" over the line, and shrink it end to end. Feed the skinny end of the heat shrink through the hole, grab it, and pull the line through. The heat shrink will pull off the end of the cooling line as soon as it clears the hole, but will leave enough line exposed to grab. I don't know if this is anything new, but it works like a charm.

Nice trick. I have also cut the tube at a 45 deg angle to feed though hull and then grab with a pair of needle nose pliers and pull

Both nice tricks! Thanks for that!

I usually do the 45 deg thing, but I was working with a scrap barely long enough and couldn't shorten it at all. It works like a mini cable puller/"Chinese Handcuffs"!