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Undercarriage - dented, rough shape

LanceB

Well-known member
Joined
Jul 18, 2003
Messages
455
Location
Louisville
Corvette
1981
Well still inspecting brothers 77 to get it road worthy. I noticed the front cross member and oil pan are dented up. Looks like someone bottomed out at some point. I am not too worried about the oil pan I am trying to prioritize the projects (trans rebuild coming soon), but the crossmember is a little concerning. I saw you could buy a new one for $141 in a catalog but I assume this means taking the entire car apart to replace. Could a body man just weld a formed piece of frame/steel over this, grind it, paint it, done? It isn't the original engine so being technically right on everything isn't a huge concern, just safety and getting it mechanically sound. Also curious about what oil pan to replace with since probably not the original L82 and I saw a couple of different types. ;help
 
B

bmotojoe

Guest
I would stay away form imported stamped oil pans if you can help it. GM used or new would be my choice. The plate steel running across the bottom is not that heavy of steel and I am sure that by welding some threaded studs in the correct places and with a rose bud and a slide hammer and the correct attachment to connect to the welded studs one could heat and work the metal back in to shape again. I have see way to many people use this point of the cross member as a jacking point to raise the car off the ground, bad, bad idea.
Brian
 

bill81vette

Moderator
Joined
Jan 17, 2004
Messages
4,321
Location
Troy,NY
Corvette
1981 dark blue metallic
there are specific jacking points on the corvettes,for both front and rear....
I suppose this is the reason why....I would try to find an original 350 or a good aftermarket replacement...
I think I would try your local junk yards first....
 

LanceB

Well-known member
Joined
Jul 18, 2003
Messages
455
Location
Louisville
Corvette
1981
So I guess if you had to prioritize the dented up crossmember, would it be a high priority or do you think it is necessarily hurting anything? I may get with my body guy before I have it is painted in the next year or so and have him reinforce it then.
 

LVMYVT76

Well-known member
Joined
Apr 21, 2006
Messages
664
Location
springfield, mo
Corvette
1976 medium blue
Are you talking about the front crossover by the engine, or the transmission crossover? The transmission crossover in mine unbolts, so if that one needs replaced, it easy to find a used one. If the front one is damaged, it would require cuttining the frame and replacing a section. If the area on the bottom is damaged from jacking the car up like a lot of people have done, you could replace the sections with flat pieces and grind it down smooth. I've sen this done before, looked good when they did , but it was done during frame sandblasting.
 

LanceB

Well-known member
Joined
Jul 18, 2003
Messages
455
Location
Louisville
Corvette
1981
Thanks for the insight guys! I think I will just tell my brother to deal with it when he gets a repaint. You guys are the best!
 

yellow77

Well-known member
Joined
Jun 17, 2004
Messages
184
Location
Tulsa, OK
Corvette
1977, Bright Yellow
Yep, mine is pretty dented, was quite concerned, but not now.
I might straighten it and fill and paint, dont know yet.

Cheers

Richard
 

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