A post that I read on Expedition Portal suggested that D2 owners should "Drill some holes in the bottom of the rear frame rails to allow drainage and avoid the rot problem which develops there."

Never heard that one before. Anybody have any thoughts on this?

If so, I wonder specifically where holes should be drilled?

 

it has holes. they get blocked and water is allowed to stand....mainly at the rear section where the big curve is. I filled mine but that would be the area of interest, if I were drilling new drain holes.....right where the curve flattens and water can accumulate.

 

There's no need to drill frame holes! Our Discos are so advanced, not only do they self-undercoat the front end, they also automatically create holes in the frame!

 

yep. that is the exact area that I was referring to. I hate to see that

 

I caked mine full of waxoyl when I installed my rear bumper

 

gotta love employee discounts on clearance waxoyl.
I filled mine with closed cell expanding foam

 

Haha not completely full, it's not that cheap

 

Good idea. That's what Ford recommends for their warranty repair on rear Windstar axles.

 

I cant remember how much I used (2 or 3 cases), but I found the best price was online from silicon depot. .........

 

IMO waxoyl then let it set (cold weather is better) and then fill with closed cell polyurethane foam to stick to the waxoyl. Maybe this would cut out any capillary ingress. Might be worth an experiment on some old chassis (frame) parts. I think I know just the man for that on the Pajero website. he's a bit of a techie