nah it came loose with the bolt loosening . I used some red on a smaller difference
to use a Cinelli 1R stem (26.4) & a 26.0mm Nitto (MB1 take-off) dirt drop stem

On my AlAn CX Super bike, in the 80's..

laying a soldering Iron on aluminum heat transfers nicely, maybe save the torch for the crank/camshaft bearings in a cast Iron engine block.