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themauler
October 16th, 2017, 20:23
NAXJA

I have just finished welding up some HD Offroad mid frame stiffeners. I am about 5 years late from installing these and my frame rails were very dented. If you have welded on stiffeners you can imagine how crappy the fit up was.

I was able to fill in all the small holes on the vertical section of the rail but I couldn't manage to get every single bottom hole to fit close enough to weld and close up the hole. For others that have ran into this problem did you fill the hole with filler or just start painting it and leave it open?

I assume water is going to get in the rails by other means so is there even a point in filling in the holes I couldn't weld on the bottom?

TIA

Nick

:us:

1990JEEPXJ
October 16th, 2017, 23:19
As long as you got most of the holes and the perimeter welded, you’ll be fine

Boostwerks.com
October 17th, 2017, 09:03
https://www.amazon.com/Dynatron-550-Auto-Sealer-Caulk/dp/B005RNFBMC/ref=sr_1_3?ie=UTF8&qid=1508252532&sr=8-3&keywords=automotive+seam+sealer

themauler
October 17th, 2017, 15:21
https://www.amazon.com/Dynatron-550-Auto-Sealer-Caulk/dp/B005RNFBMC/ref=sr_1_3?ie=UTF8&qid=1508252532&sr=8-3&keywords=automotive+seam+sealer

I am thinking of doing that for the weld seams up top but should I fill up the bottom holes with that? Not sure if I should try to keep the water out or let water in and drain as best as possible...

Bent
October 17th, 2017, 15:28
... let water in and drain as best as possible...

You definitely want the water to be able to drain out. When I did mine I made sure not to cover any of the factory drain holes. The other day after washing out my engine compartment I pulled the XJ back a little bit in the drive. When I got out there was a significant amount of water that ran out the frame holes.

Boostwerks.com
October 18th, 2017, 10:28
You definitely want the water to be able to drain out. When I did mine I made sure not to cover any of the factory drain holes. The other day after washing out my engine compartment I pulled the XJ back a little bit in the drive. When I got out there was a significant amount of water that ran out the frame holes.

This.

I also think it's a good idea to hit the inside of the frame rails with an inner frame coating. Eastwood's works great. http://www.eastwood.com/eastwood-internal-frame-coating-14oz-aerosol.html

When you weld the stiffeners to the chassis, your creating a spot on the inner frame rail that will be prone to rusting. Coating the inside will prevent this.

2 cans was more than enough for me to do the entire chassis.