why rust there????

[riz]

This may be a simple answer or a dumb question or both,............ why so much rust on the tailpan and rear of the rear floor ? Is it a problem with poorly sealed toppers? Is it poorly sealed sliding rear windows? Just curious since so many of us have pulled the carpet up to find it these areas. Also the rear seat floor corners? I ponder things and have an inquiring mind.

RIZ

 

[ryoken]

it's not a failure from above, but below...

the tailpan gets muddy water sludge blasted right into the leading joint on the underside.. this is why you see so many floor section rotted up a few inches too...

a proper application of seam sealer when it's replaced takes care of that.... now, if the factory had done it....

 

[diesel4me]

I feel the factory seam sealer CREATES rust!--almost without fail,the areas they used seam sealer is where rust starts and eats thru first on the floors--every GM car I have owned had those oval "plugs" in the floors that were seam sealed and all of them rotted there first..same way with the seams on truck floors...its always the white 3M seam sealer that seems to fail and let water intrude--the asphalt black stuff used on the cowl and firewall never seems to rust though...

I used roof patching cement for seam sealer on my floor repairs,it works great and dont let rust grow back...it does make doing any welding nearby a hassle though,as it'll burn like napalm!...but so does the other "real" seam sealer...

 

[ryoken]

thats cuz they would just blob it here and there... water infiltrates around it.. rust sammich...

makes that factory stuff come off easy when it's all crusty behind it!