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Tool Talk Discussion Forum

chevy frame

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nate s

02-05-2006 05:18:24




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hi everyone
ive got a 96 chevy 1500 that i bought in 98. so i know what has happened to this truck most of its life. I was under it the other day and found the frame on the drivers side by the tranny cross member was cracked accross the bottom flange. Does anyone have any experience welding frames? I was wondering if i should heat it before and after welding? I dont know if pickup frames are tempered like cdl vehicles are. This crack was not there last fall when i put a clutch in it. Just wondered if i should do anything special to help the weld hold. thanks nate

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mj

02-07-2006 09:25:04




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 Re: chevy frame in reply to nate s, 02-05-2006 05:18:24  
I use 7018 rod and peen all around the finished weld for stress relief. Works good.



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jdemaris

02-05-2006 15:31:18




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 I cut mine in half and welded, it's been fine in reply to nate s, 02-05-2006 05:18:24  
My truck frame rusted so bad it broke by the rear spring perches. So, rather than change the entire frame, or junk a good running truck, I cut the truck in half just where the cab ends, and welded in a new (actually a good used rust-free) entire rear half of a frame. That's on my 1969 Dodge W200 Power Wagon. I welded it in 1984 and have been using it ever since hauling a full 300 gallon sap tank in the spring during sugar season, and firewood the rest of the year. I did nothing special, no preheating, no tempering, and used mild-strengh 6011 and 6013 rod with a plain old AC welder. I've been using it over 20 years and there's been no sign of cracking or any other related problems - except that it's a Dodge. I also cut the frame in front and welded in a fabricated mount to adapt GM powersteering box to it, and it too has been fine.

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Hawaiirocky

02-05-2006 15:28:02




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 Re: chevy frame in reply to nate s, 02-05-2006 05:18:24  
The Chevies had a problem with their frames during that time period. Chevy came out with a kit to repair it, it wasn't much more than a new cross member and some steel band-aids. I'm in towing, and have come across a few Chevies that had the problem when wheel-lifts were added to the trucks. Chevy didn't want welding done to the frame, but I've seen it done with good results.



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Steve Crum

02-05-2006 15:20:31




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 Re: chevy frame in reply to nate s, 02-05-2006 05:18:24  
It might be worth your while to check your state laws, in some states it is illegal to weld a frame or have it done by other than a certified welder. An inspection mechanic having a bad day can easily red tag a vehicle with a welded frame which becomes a permanent addition on the vehicle title. Read farm truck.



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thejdman01

02-05-2006 07:15:33




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 Re: chevy frame in reply to nate s, 02-05-2006 05:18:24  
2 things I would do (as have done on semis) one you drill out the end of the crack. Hard to explain easier to draw a picture but basically you put the edge of the drill bit on the very end of the crack so 1/2 the drill bit cuts into virgin metal 1/2 of it cuts into the crack. This SHOULD stop the crack from spreading any farther. The next thing you will want to do is v notch both sides of the crack. Weld her up. The only problem I can forsee is you "pushing cracks". If the vehicle cracked becasue of a one time overloading you should be able to repair it and not have any problems, however if the frame is twisted etc I have seen many many times where you fix a crack over here and a new crack starts over there. Some times the only way to fix it is to replace the frame rail, it can be done but its a job. You can go to chevy give them your vin number and they will and can give you a left or right frame rail cross membre wahtever you need but youll need a portable drill press with a magnetic base as you have to drill out all holes, it is a job.

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nate s

02-05-2006 09:43:35




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 Re: chevy frame in reply to thejdman01, 02-05-2006 07:15:33  
thanks jd man, i dont think the frame is twisted. its never been in an accident. i overloaded it once a few years ago. could it take this long to develop a crack? ive been pretty easy on this truck, basically just a commuter. ill drill it and weld er up this after noon. thanks for the help.
nate



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thejdman01

02-05-2006 14:22:54




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 Re: chevy frame in reply to nate s, 02-05-2006 09:43:35  
I agree about disconnecting all computers, a welder has the potential to really screw them up. It shoudlnt ahve taken that long to develp a crack however if you stressed the metal and tweeked it just a bit the years of hitting bumps etc could have finally decided to make it give up. Good luck.



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Ryan - WI

02-05-2006 11:30:24




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 Re: chevy frame in reply to nate s, 02-05-2006 09:43:35  
Make sure to at least take off the ground cable before you weld. Put the work cable as close as you can get it to the crack too.

I personally would unplug all the computers if it were me. A bit of work but it sure saves them from the possibility of frying.



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