advise for cab mount install
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Senior User
Joined: Feb 2004
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From: WEST TENN.
advise for cab mount install
After spending all week ride around feeling all the vibrations of the cab resting on the frame I have decided to tackle the front cab mounts this weekend, right now the body is resting on the frame and you can feel all the vibrations thru the cab at higher speeds. I cut the cab mounts out of a 71, and am going to install them into my truck using rivets since I have no welder. Before I start this anyone have any suggestions or advice for me?
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Joined: Dec 2003
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Agreed. Aluminum rivets will fail very quickly. Bolting them in would be better than riveting, but not by much. Installing them the proper way by welding them will ensure you won't be doing this procedure again really soon.
Lead Driver
Joined: Aug 2003
Posts: 7,592
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From: **** hole San Jose ca.
If you just get some grade8 1/4'' bolts with some good size washers spaced about 1''1/2 apart should hold it for along time unless your going to be using it off road. If so then bolt it in place and go around town and see who will weld it the for the less $$... my 2 cent's
orich
orich
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Joined: Jun 2002
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From: Atlanta GA
Do not use rivets, they are meant for clamping, not shear loads. If you have to, use grade 8 1/4 bolts with lock washers under the bolt head and under the nut. Tighten to 15 foot pounds. The holes should only be big enough to have to thread the bolt through with the threads, once the threads are clear of the metal, tap it in the rest of the way with a hammer.
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Joined: Jan 2004
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From: syracuse, kansas
A muffler shop will be able to weld the lite gage metal with no problem. Even if you bolt it get it welded asap. Cost should not be that high. Be sure and fold the floor covering back when you do this.
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Joined: Apr 2001
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From: Vancouver Island
Originally Posted by X-1
After spending all week ride around feeling all the vibrations of the cab resting on the frame I have decided to tackle the front cab mounts this weekend, right now the body is resting on the frame and you can feel all the vibrations thru the cab at higher speeds. I cut the cab mounts out of a 71, and am going to install them into my truck using rivets since I have no welder. Before I start this anyone have any suggestions or advice for me?
Gary
1968 Mercury 250
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Senior User
Joined: Feb 2004
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From: WEST TENN.
Thanks for the responses, for now I will do them using bolts, this is a street truck, and the vibrations killing me, latter I can get them welded up. Thanks for talking me out of the rivets.
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Make sure the rubber bushings between the cab mounts and the frame are still in good shape. If there not, you can either order a complete set for about $50 which includes all the hardware to bolt the cab back on, or you can make your own. This will help to reduce the vibration.
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From: WEST TENN.
Thanks,
I got one in, it was a pain, the cutter I had wouldn't cut it, so I had to use hand shears, and a grinder to make it flush, ending up using self tapping screws till I can get to the welder. The screws pulled it up nice and tight. I would have drilled, but my floor is thin in spots, and I didn't want to weaken it anymore than needed, but even with just one repaired what a difference, truck just feels better, if my used mounts don't hold up, then I can unscrew them and buy new repacements. Next is the driverside which also needs the e-brake cable replaced, the cable housing is kinda frayed, so I got another cable to install, so that goes in this weekend, this truck is almost brand new again!!
I got one in, it was a pain, the cutter I had wouldn't cut it, so I had to use hand shears, and a grinder to make it flush, ending up using self tapping screws till I can get to the welder. The screws pulled it up nice and tight. I would have drilled, but my floor is thin in spots, and I didn't want to weaken it anymore than needed, but even with just one repaired what a difference, truck just feels better, if my used mounts don't hold up, then I can unscrew them and buy new repacements. Next is the driverside which also needs the e-brake cable replaced, the cable housing is kinda frayed, so I got another cable to install, so that goes in this weekend, this truck is almost brand new again!!