Welding in patch panels with a flux core welder without a gas envelope is an exercise in burn through and swearing so glue it was.
Floor board patch panel welding.
Along with examples and simple explanations this video will help you make that decision.
Then use urethane seam sealer to seam up the weld area front and back after it has been epoxy primed.
When the replacement panels have a spot weld flange i punch 1 4 holes in the panel and plug weld the panels if i ve got more flange i ll use 3 8 holes.
And maybe the epoxy would result in a more rustproof seam.
Here are a few of the volvo s i ve done.
Mostly but at times will use discarded hoods fenders for patches for your jeep i d use 18 ga.
Steel cab repair panels 1982 93 chevy s10 1982 93 gmc s15 sonoma steel cab repair panels 1957 60 f100 f250 steel repair panels 1996 09 chevy gmc full size van.
See all 13 photos.
When welding patch panels should you use a lap weld or a butt weld.
Remember to clean w wax and grease remover before ya start or grinding at the patch area has a possibility of contaminating w silicons and your paint will not.
Dc for patch panels at the college autobody we use 18 ga.
And we use 023 and c25 for all.
I soon discovered that both patch panels were nice and thick about 18 gauge but were made of galvanized steel not the best option for welding but at least more rust resistant than unprotected.
The first step was to cut out the rust.