A common problem that we run into with a lot of our vehicles that have existing weld nuts in the bottom of the frame is that when you go to try to put a bolt in them you have an excessive amount of road grime or rust built up in there and when you go to put your bolt inside the weld nuts you find not only does it not want to thread but it also appears that the bolt is too big for the weld nut. The first thing that typically comes to mind is that the bolts that I received are too big and 99.9 percent of the time this is not the case. What we have actually got here is an excessive amount of rust and debris built up in the weld nuts that are preventing the bolt from starting. We are going to show you how to get those thoroughly cleaned out so that we can not only get our bolt started but to get it threaded completely into the weld nut. 00:41
To clean it we are going to take a spray lubricant like a WD-40 and soak it down really well and you may need to let it sit for a little bit and this process is probably going to have to be done a couple of times. We are now going to take a wire brush and start working it in and out. We are really going to concentrate on the bottom few threads. Once we can get the bolt started we can actually use it to help further along the cleaning of the threads. You can see now even after two cleanings that I can get the bolt to grab but that is all the more I am getting out of it. It is still a little tight. Again I am going to continue with the cleaning. 01:20
You can see now after multiple cleanings that I was able now to get a couple threads in so from there what I am going to do is take and use the bolt to help finish cleaning out the weld nut. You can do this with a standard ratchet if you do not have air tools, using an air tool will make the process a little bit quicker. Start tightening the bolt up and when you start feeling an increase resistance from the weld nut, stop and back the bolt back out and spray it back down with a lubricant. Once we get quite a few threads started what we are going to do is start tightening until we get resistance, backing it off a few threads, tightening it back up, releasing. Continue that process and the bolt is going to slowly work its way up through the weld nut and clean as it goes. There you go, you can see again that after a lot of time and patience we have finally got our bolt into the weld nut nice and easy and then we can put the hitch up and it is going to be very easy to do.
Today on our 2010 Lincoln MKX were going to address the exhaust rattle issue. There are a couple of reasons for occasional contact between hitch and exhaust. One, the manufacturers have loose tolerances from mounting the hangers that suspend exhaust systems. Final placement of the exhaust can vary slightly from vehicle to vehicle. The flexibility of rubber isolator connecting exhaust hanger to the vehicle frame allows for more movement of the exhaust system relative to other vehicle components. An isolator can also stretch over time.
So you are in the middle of doing your hitch installation and you are in the process of taking out one of your existing factory bolts. In the process you find that the bolt is not coming out due to the fact that the weld nut inside the frame has broken. We are just going to go ahead and show you a couple of things you can do to not only get the bolt out of the way but to also go ahead and continue on to be able to put your hitch in position without the weld nut welded inside the frame. The first thing that we obviously need to do is go ahead and get the bolt out of here. There are a couple of different ways you can do this. You can take a chisel, is you have one large and strong enough to do so, and possible grind the head of the bolt off. Or you can actually take a torch and torch it off. And that is actually what we are going to do on this application here. I am going to try to get most or as much of the head of the bolt off as I can. And we will take and push the remaining section of the bolt-weld nut combination up inside the frame. 0:49
Today we are going to show you a cheat. In some cases you are going to have a hitch that uses threaded holes in the bottom of the frame. Those holes are going to be probably corroded up within a few years of the vehicle being on the road with dirt, grime, salt corrosion, you name it is probably in there inside the fine thread. What you want to do is clean out the threads probably with an existing hitch bolt if it is lightly corroded and you can probably work it in and out a few times and do that. 00:20
Today we are going to review the components needed to pull a trailer. Basically, this video is designed for somebody who just decided they have a need for a trailer, so we will cover all the components in the most basic form, so you know exactly how to update your vehicle. What we are going to do is start from the truck and work our way back to the trailer. First off, we are going to show you the hitch itself. All vehicles require a hitch to pull a trailer. What this device does is makes an attaching point on the frame of the vehicle, or body components, and transmits the forces from the trailer to this one point here. This point here is the receiver part. Consequently this hitch is called a receiver hitch because this hitch can receive a draw bar, or also called a ball mount. It is held in place by this pin which we just ed, and this clip holds it in place. There are more fancier pins, like locking pins, but that is the basic thing you need right there to get the job done. 1:12
Okay as you can see here on the drivers side, our weld nut has a lot of corrosion built up in there. And when we try to install our 10 millimeter bolt is not wanting to start at all, in fact it almost seems like the bolt is too big for the weld nut. It is a common misconception, again when the weld nuts got a lot of build up in there.