changing body mounts? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gabet40 · 06-18-2004, 08:15 PM

are your body mount bolts welded to your body as well? if so how do we switch out the bushings without completely lifting the body?

**FRENCHBLUE72** · 06-18-2004, 09:31 PM

Your body bolt's should not be welded to the body if so I would cut off the head of the bolt and replace the bolt's when you replace the bushing's..

NuBomb · 06-18-2004, 11:12 PM

Finally something I can comment on. I just finished replacing the body mounts in my 72. Yes each bolt has a spot weld to help secure the bolt. I took a cut-off wheel and cut the heads like pizza and used a cold chisel to break them off. The ones in the floorboards are sunken (sp?) in recessess. I used a cut-off wheel and tried to make a cross that went through the middle, and then used a large drill bit to drill the head of the bolt off. I ended up having to use the chisel to finish the break of the head. I used a grinding stone on the end of a die grinder to clean off the spot weld.
I did one side at a time. I used a floor jack and some pieces of 2 x 6 (to spread the weight) and lifted each side of the body. It really wasn't that bad of a job. I got the mount kit from Tim Christian and it was perfect. I would suggest getting a very good quality drill bit for the bolts going through the floorboard.

Huskerboy2 · 06-18-2004, 11:12 PM

Yes, the body bolt heads are tack welded to the floor from the factory. You can grind them, although the recessed ones can be tough to get at with a grinder.

Huskerboy2 · 06-18-2004, 11:13 PM

You beat me to it NuBomb.

gabet40 · 06-19-2004, 04:59 AM

and this is definitely easier than lifting the body, what would it be, 8 inches? right? you should know that i just put in the engine and tranny and havent put the fenders back on yet
I appreciate the input

71RestoRod · 06-19-2004, 06:23 PM

Mine were tack welded to the floor too. I just center punched the bolt heads and drilled through them... used a 1/4" punch to drive the bolts down through the mounts and an air chisel to knock the heads off.

06-18-2004, 08:15 PM	#1
gabet40 Registered User Join Date: Dec 1999 Location: Modesto, CA Posts: 565	changing body mounts? are your body mount bolts welded to your body as well? if so how do we switch out the bushings without completely lifting the body? __________________ Current owner of 2016 2500 Silverado Midnight Edition. Former owner of: 69 1/2 ton, change from long/fleet to short/fleet, shaved door handles, shaved tailgate, 4/6 drop, power windows, 700r4 72 blazer, 350 with Holley Commander 950 DFI, crane energizer cam, 350 tranny, dual sanderson blockhuggers/magnaflow exhaust

06-18-2004, 11:12 PM	#3
NuBomb Registered User Join Date: Jan 2002 Location: Canton, Georgia, USA Posts: 1,119	Finally something I can comment on. I just finished replacing the body mounts in my 72. Yes each bolt has a spot weld to help secure the bolt. I took a cut-off wheel and cut the heads like pizza and used a cold chisel to break them off. The ones in the floorboards are sunken (sp?) in recessess. I used a cut-off wheel and tried to make a cross that went through the middle, and then used a large drill bit to drill the head of the bolt off. I ended up having to use the chisel to finish the break of the head. I used a grinding stone on the end of a die grinder to clean off the spot weld. I did one side at a time. I used a floor jack and some pieces of 2 x 6 (to spread the weight) and lifted each side of the body. It really wasn't that bad of a job. I got the mount kit from Tim Christian and it was perfect. I would suggest getting a very good quality drill bit for the bolts going through the floorboard. __________________ Jeremy (NUBOMB) 72K5 CST 350/350/205 1951 Chevy 1/2 ton North Georgia Group "... And the first rule to being a man is you gotta spend your life doing crap you don't wanna do." Red Forman.

06-18-2004, 11:12 PM	#4
Huskerboy2 Senior Member Join Date: Feb 2001 Location: Austin, Texas, USA Posts: 1,628	Yes, the body bolt heads are tack welded to the floor from the factory. You can grind them, although the recessed ones can be tough to get at with a grinder. __________________ '72 Chevy Blazer

06-18-2004, 11:13 PM	#5
Huskerboy2 Senior Member Join Date: Feb 2001 Location: Austin, Texas, USA Posts: 1,628	You beat me to it NuBomb. __________________ '72 Chevy Blazer

06-19-2004, 04:59 AM	#6
gabet40 Registered User Join Date: Dec 1999 Location: Modesto, CA Posts: 565	and this is definitely easier than lifting the body, what would it be, 8 inches? right? you should know that i just put in the engine and tranny and havent put the fenders back on yet I appreciate the input __________________ Current owner of 2016 2500 Silverado Midnight Edition. Former owner of: 69 1/2 ton, change from long/fleet to short/fleet, shaved door handles, shaved tailgate, 4/6 drop, power windows, 700r4 72 blazer, 350 with Holley Commander 950 DFI, crane energizer cam, 350 tranny, dual sanderson blockhuggers/magnaflow exhaust

06-18-2004, 09:31 PM	#2
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,608	Your body bolt's should not be welded to the body if so I would cut off the head of the bolt and replace the bolt's when you replace the bushing's..

06-19-2004, 06:23 PM	#7
71RestoRod Registered User Join Date: Sep 2003 Location: Evergreen, CO Posts: 494	Mine were tack welded to the floor too. I just center punched the bolt heads and drilled through them... used a 1/4" punch to drive the bolts down through the mounts and an air chisel to knock the heads off.

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