bought a jacked up ls6 intake please help
First, a cheapo Wal-Mart low-wattage soldering iron. Get a
pack of brass bolts that have the same thread as the tip. File
the heads on a couple of them to be a flat plate. You will use
these as a "hot trowel" for your plastic stucco work.
Now at said Wal-Mart, also pick up a couple of cheapo black
plastic cooking spatulas. The ones you want will look, feel and
taste like your manifold, both are black high-temp nylon only
the spatulas are not likely glass-fiber loaded.
Cut the spatulas into small "welding rods". Use the soldering iron
to melt and push a bit at a time into holes, work it until the wall
melts just slightly and the two plastics merge. Keep on until filled
nicely, trim while warm, badda-bing. If the hole is deep and narrow
the soldering tip might be useful, pack the hole with plastic and
ram / stir it with the fine tip until it's sticking nicely.
Structural stuff is more iffy but possible, you want to watch the
porosity and how well things are sticking. You might want to
practice a bit with features you don't care about, just to get the
feel. Like the underside of the TB flange or something that won't
be seen.

