Door/Fender gap after wheeling

[76k5blazerr]

Ok so I took my 76 k5 on its first wheeling trip since I have owned it last Saturday. Went to Uwharrie NF. So the truck made the 150 mile round trip and wheeled all day just fine, no problems but the next morning when I looked at the passenger side, the gap between the pass. door and the front fender was larger than it should be, wish I could post a pic. But it's a bigger gap than there was before wheeling and bigger than the driver side by far. What do yall think caused this. I flexed out a lot at Uwharrie and jolted around a lot on the dirt roads. Maybe this caused it? Another thing is when I threw it up on the lift at my buddy's shop, when the lift arms come up from the ground and reach the frame of the truck, as they lift the truck off the ground the gap goes back to normal, how it was before wheeling. Any ideas guys? The truck still drives just fine but I'm wondering what happened here and how bad it is.
Thanks

 

[rampage]

Depends if it's at the top or bottom of the fender/door and whether your buddy's lift is lifting from the frame/axles or body. It could either be a cracked frame or worn body mounts.

 

[76k5blazerr]

It was lifting it by the frame. And the gap is more at the bottom of the door/fender. Then when you lift it by the frame it closes the gap back to normal. Ideas?

 

[rampage]

I'd inspect the front passenger side of the frame between the spring mounts carefully. Another thing to check is to see if the fender itself is loose. Grab the bottom front of the fender by the turn signal and try lifting it. It may be that you have rotten body mount bolts at the radiator core support. Pics would definitely help though, both with and without the gap showing.

 

[Stomis]

Its not uncommon for the core support body bushings to pull right through the mount.

But what you're describing almost sounds like front of the frame is bending up with weight on it and springing back when the unsprung weight pulls back down on it. You're definitely gonna need to provide pics.

 

[daylton]

if you can definitely pay for the membership here its worth it!!

 

[blazer74]

Front cab support failure at first thought.

 

[Chevy305]

First things first, check the condition of your body mounts and make sure they are tight. If they are questionable, replace them. Once your body mounts are figured out, then readjust your fenders to an even gap.

If the gap is still too large at the bottom, try shimming the cab mounts up.

 

[Stomis]

First things first, check the condition of your body mounts and make sure they are tight. If they are questionable, replace them. Once your body mounts are figured out, then readjust your fenders to an even gap.

If the gap is still too large at the bottom, try shimming the cab mounts up.

The thing that gets me though is the thought that its changing when the truck is picked up on a lift.

 

[76k5blazerr]

Guys I'm gonna try to get me a membership when I get payed this week but until then, without pics, what should I check. I do know that my body mount bushings are shot, but they have been shot since I bought the truck. But maybe one of them pulled through while I was flexed out while wheeling... Anything else I should check?

 

[blazer74]

cab supports for condition, rust, collapse etc . Rubber bushings split / missing .
Frame damage in same area.

In order to have gap at bottom cab has dropped and or fender has moved up at the front or down at the back by door.