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mstanton

Batman is right. Original 70-72 cushions were aluminum. Rubber was not used until 73.

sweethence

Sorry Charlie
But nope the 68 body mounts are solid

I'm Batman

Nope, the 68-72 cars came with aluminum spacers instead of rubber cushions. Try a bit of research before you unleash the attitude, please. Here's some threads for you:
http://forums.corvetteforum.com/show...num+cushion%2A
http://forums.corvetteforum.com/show...num+cushion%2A
http://forums.corvetteforum.com/show...num+cushion%2A
http://forums.corvetteforum.com/show...num+cushion%2A
http://forums.corvetteforum.com/show...num+cushion%2A
http://forums.corvetteforum.com/show...num+cushion%2A

And the real kicker:
https://www.corvetteforum.com/techti...=210&TopicID=3

I've seen a body mount, I changed mine a few months ago...with poly. Would you care to try again?

BTW, the PM about my "stupid post" was certainly an interesting way to start the day. Some members might react most negatively to such messages.

sweethence

wnmech

I have been reading all the replies on this thread and on my 77 when the front end is on jack stands I have no problems with door rear gaps or closing problems but what I do notice when I open up the doors and look up under the front fender where it meets the birdcage below the windshield the gap that is in there increases is that normal?

Michel B

I had flex also, after repairing all body mounts the problem diminished but the part that completely solve the problem was replacing the windowframe and *T*bone at the top. just these parts alone made the car solid. I have no more flex at all.

Zixxer

http://www.valvoline.com/carcare/art...cid=5&scccid=7

I have to believe that there is some flex in the C3 frame. Maybe it varies but I've owned a 1996, 2001, and now an 82 and every one of them flexed to some degree when being jacked up. Jack up the side of a truck sometime and watch the bed go out of line. Jacking points are critical and there for a reason because there are different stress points based upon the balance of weight. Now, that said, if you have a large gap it could be an indicator but I wouldn't worry too much. If you are seriously concerned, take it to a body shop and have an expert look it over.

wjsullivan

In my case the flex is very, very small, less than 1/16 of an inch total movement as it relates to on door striker. It just happens to be that on that particular striker I had no room for any type of flex.

There is definately some flex in these cars, not necessarily the frame, as mine is rock solid, but more likely the birdcage. Convertables more so than coupes because they don't have any structural support provided from the t-bar.


Just look at the physics of it. You have changed where the load is resting when you put it on jack stands. Consider how the engineering would have changed if your wheel base was where you jackstands are?

69camfrk

Mine is the same way. Southern car and frame looks new underneath.

PNK

Every single C3 has frame flex when you jack it up, sure if you have frame issues like rust or cracks it will be worse, but there will always be frameflex to some extend on these cars.

I have lifted more than 50 different C3's from 68- 78 and most of them had visible flex when jacked up.

Convertibles flex alot more than the coupe, i own a 68 myself and flex are even more of a problem here than the other years (68 are missing the a set of extra bracebars at the kickup in the back).
I can guarantee that my frame is just as healthy as when it came from the factory but depending on where i jack up the car in some cases i can have my doors bind slightly or i can see the hood shift more to one side or the other.

Worring about the car crack in 2 pieces at the higway is unless you have a really ****ty/rusty frame.

There is a reason that books has been written about how to beef up that sloppy frame.

tigers123

nutsy

i never thought there should be any flex in frame but this statement about a truck bed got me thinking. you can see the movement on the bed if you look at gap between bed and cab. they must flex.

bwellisley

My 68 has no issues in this respect either....

cduemig

FELLAS! Can't we all just get along... Lol, some people are really passionate about their technical info.

I'm Batman

That certainly would be nice.

Zixxer

The problem is we put our own tone of the posting person in our heads when we read a post. Regardless of the little "Smilies" sometimes it comes across like you're being an ***.

Then it always appears the threads split into two factions trying to ensure they are correct or have to prove a point. If you're right, take the high road and just put the facts out there with a source if needed. Sarcasms can be such a killjoy.

I personally follow a few folks on this forum just because of the way they put out information and even when challenged they keep there head about them. Durango_Boy comes to mind right off…always a wealth of information and never seems to take offense. Kudos to him. Many others to thank but I just suck at remembering the goofy handles.
:o

and finally

Happy Holidays to all

1Z87L8

my 78 must be a special car.

doesnt flex t-tops on or off doors and hood
open and close with no problems and will even set up
on 3 jackstands.
before you ask thats 2 at the rear and
1 either side up front.

never tried it with 2 up front and 1 either side
in the rear but i think i will come spring just to
find out.

PeteZO6

From what I'm reading here the frame on my '69 convert. is weak and about to fall apart. It has flexed from day one for me. With the top down, if I drive into a driveway at an angle the door ajar light often comes on briefly as a result of frame flex. When I put it on jack stands which I locate at the recommended jack points on the side frame rails, the back of the car droops slightly; the gaps at the back of the doors widen slightly.

With the hard top bolted on the car is much more rigid. The door ajar light doesn't come on on driveways and the entire car feels more solid, especially on a twisty or bumpy road. It changes the entire character of the car.

As for aluminum body mounts, my car missed those going down the assembly line. They are rubber.

Cheers,
Pete