lookforjoe
True Classic
Looking good! No creaks, groans or rattles from the exhaust I hope?
One way to improve a slip-joint on an exhaust is to use a band clamp over the joint. There are two styles. One is flat and offers a lot of clamping force without crushing the pipes (so it can be removed again in the future), and the other is stepped to overlap the joint (providing a secondary seal):one slip on joint which needs to be joined better
I used the type in the first photo for my Volvo exhaust and they worked quite nicely. You get a good seal, and not damage the pipes so they can be easily removed. I'll likely go that route when I put together an exhaust for the X.One way to improve a slip-joint on an exhaust is to use a band clamp over the joint. There are two styles. One is flat and offers a lot of clamping force without crushing the pipes (so it can be removed again in the future), and the other is stepped to overlap the joint (providing a secondary seal):
View attachment 12903
View attachment 12904
I seem to recall mine sitting on top of slip joints with slots, and it compressing the slots. Definitely was not a butt joint. Not sure you would get a gas tight seal with a butt joint because the clamps are not sealed.That first one is also intended for a butt-joint between two pipes. In other words no slip joint (no overlap) of the two, just end to end. Personally that seems a tad questionable, for fear of them separating. But in reality they don't due to the great clamping force of these, so I guess it works. If you have a slip joint with "slots" along the sides of the outer tube (as with many aftermarket exhaust systems, shown below), this type of clamp holds them together and seals the slots.
View attachment 12915
Not sure you would get a gas tight seal with a butt joint because the clamps are not sealed.
There are some band clamps that are a single layer and some that have multiple layers. The single layer ones might have a slight gap along their length where they close (see photo below). The multilayer ones are what Karl refer to, same as what Bosal offers (also available from other makers). The will seal because there is no gap, even along the closing seam (also shown below). Either type is available in both styles (flat and stepped).I prefer the Bosal clamp that VW uses for their butt joints, they are rigid and last a long time.
View attachment 12229 View attachment 12228
I went through the same thought process you did to hang my exhaust but decided a cross brace was more complicated than I needed to just hang a turbo muffler from the header. As you can see I just use a simple exhaust hanger strap bolted to the back panel and a tab I welded on the exhaust pipe.
Congatulations on the progress - Nice '72 H2!Ive now put a couple hours of drive time on the car after finishing up the exhaust. I put together a video of me farting around the neighborhood repeatedly revving up the engine way more than it needs and annoying all my neighbors. But hey this is an exhaust test is it not?
Congrats on successfully getting it back on the road. Thanks for the video, sounds great.
Sounds great, bummer on the emissions approval but good job on choosing parts that helped your car hit such good numbers. I don’t recall which cat you chose, I think the one on my 87 is toast and though its tempting to just dump it, I personally prefer to have one. So which one did you spec?
Looking forward to the next steps along this path. Congrats on this milestone.
Congadulations on the progress - Nice '72 H2!